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No. 30 March 2017 3M SM Health Care Academy Espertise Magazine Content Dear Reader, Science … is just science. Until you make it improve the world. 3M combines science, technology, creativity and innovation to make a real impact, stimu- lating progress to inspire people and communities across the globe. This is exactly what happens at 3M Oral Care, where 3M products are developed and improved every day to support dental professionals in achieving clinical, professional and personal success. In this issue of the 3M SM Health Care Academy Espertise Magazine, you will learn from the company’s researchers how 3M science evolves into new materials and devices that offer you practical benefits. In addition to this, users of innovative products share their clinical experience with you, giving you new ideas of how to simplify your work. Finally, you are informed about new educational programs, platforms and competitions. Enjoy reading! 3M offers new platforms for dental, orthodontic and health care education ............................................................... 2 Exploring 3M Science. Applied to Life ......................................... 3 Simple and beautiful: Dual-layer technique in the anterior region......................................................................... 4 Helping young dentists to be equipped for the future ................7 Wanted: Talented young dental professionals!............................ 8 Development of a new bulk fill restorative with increased opacity ....................................................................10 Amalgam replacement using a new bulk fill restorative with increased opacity................................................ 12 Tablet-based intraoral scanning: A small innovation making a huge difference ............................................................... 14 Digital implant impressions – an update ..................................... 16 Following a simpler path from prep to crown............................20 Insights into the development of a new oxide ceramic restorative material ......................................................... 22

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Page 1: 3M Health Care Academy Espertise Magazine...shade selection, the VITA classical A1-D4 shade guide was used (Fig. 4). Alternatively, the individual shade guide produced with the desired

No. 30 March 2017

3MSM Health Care Academy

Espertise™ Magazine Content

www.3MESPE.com

Dear Reader,

Science … is just science. Until you make it improve the world. 3M combines science, technology, creativity and innovation to make a real impact, stimu-lating progress to inspire people and communities across the globe. This is exactly what happens at 3M Oral Care, where 3M products are developed and improved every day to support dental professionals in achieving clinical, professional and personal success.

In this issue of the 3MSM Health Care Academy Espertise™ Magazine, you will learn from the company’s researchers how 3M science evolves into new materials and devices that offer you practical benefits. In addition to this, users of innovative products share their clinical experience with you, giving you new ideas of how to simplify your work. Finally, you are informed about new educational programs, platforms and competitions.

Enjoy reading!

3M offers new platforms for dental, orthodontic and health care education ............................................................... 2

Exploring 3M Science. Applied to Life ......................................... 3

Simple and beautiful: Dual-layer technique in the anterior region ......................................................................... 4

Helping young dentists to be equipped for the future ................7

Wanted: Talented young dental professionals! ............................ 8

Development of a new bulk fill restorative with increased opacity ....................................................................10

Amalgam replacement using a new bulk fill restorative with increased opacity ................................................ 12

Tablet-based intraoral scanning: A small innovation making a huge difference ...............................................................14

Digital implant impressions – an update .....................................16

Following a simpler path from prep to crown ............................20

Insights into the development of a new oxide ceramic restorative material .........................................................22

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ContactAshley HaslundGlobal Customer Education [email protected]

ucation credits earned during these courses can be awarded, and archived, automatically to the participants depending on their country’s regulations.

Additional information offered on the platform includes prod-uct technique videos and a wide range of literature. Regis -tered users and visitors may research, read and download e. g. scientific articles, clinical study reports and white papers.

Content for orthodontic professionalsSimilar content is offered to orthodontic professionals on their own landing page. They may access on-demand education and product training as well as educational resources focusing on esthetic orthodontic treatment options etc.

How to get startedTo access the US-based 3M Health Care Academy site, go to www.3M.com/dental or www.3M.com/orthodontics, and click on the Education tab on the menu bar. Next, click the Register button under Access on-demand Education and cre-ate an Enterprise Network Login with a username and pass-word. Follow the links to find the resources that fit your needs. One-stop education is that easy!

3MSM Health Care Academy was recently created as an integrated training and education resource for health care professionals. Via discipline-specific landing pages, dental practitioners and orthodontic specialists are granted access to educational programs and information tailored to their par-ticular needs. While the main content focuses on topics most relevant for their own profession, there will also be options to explore a wider area within 3M Health Care: In the near future, registered dental professionals will be able to access literature that focuses on infection prevention or attend an online webinar about health information systems to broaden their minds.

In late 2016, the new 3M Health Care Academy landing pages designed for dentists and orthodontists were rolled out in the United States. Currently, 3M Health Care Academy land-ing pages for dentists and orthodontists are being rolled out in other regions as well: In Europe, for example, the Nordic region is launching the platform; webpages with specific con-tent for the D-A-CH region (Germany, Austria and Switzer-land) will follow in the summer of 2017.

Content for dental professionalsThe landing page for dental professionals allows visitors to obtain an overview of the upcoming events. They can also reg-ister for in-person seminars offered somewhere close to their dental office (searchable by state) or for live online education.

Registered users of the 3M Health Care Academy platform are given access to diverse online CE-courses that focus on topics such as cementation of contemporary dental materials, direct restorative treatment techniques and intraoral scanning. These courses are available on-demand, which allows interested professionals to continue their education on their own sched-ule. Due to a learning management system, the continuing ed-

3M offers new platforms for dental, orthodontic and health care educationAshley Haslund, 3M Oral Care, St. Paul, Minnesota

The new 3M Health Care Academy landing page for dental professionals: http://www.3m.com/3M/en_US/dental-us/education/.

On-demand webinar by Dr. Daniel Poticny, DDS, titled “A Clinicians Guide to Cementing and Bonding Contemporary Dental Materials”.

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"Science and collaboration are at the heart of everything we create that makes life better. Now, we invite our current and future customers to come be surprised by the breadth of 3M science in their lives". This quote of Jesse Singh, 3M senior vice president of Marketing and Sales, was published with the announcement that 3M launched a new corporate brand appearance and communication strategy in 2015: 3M Science. Applied to Life.™

And the quote says it all: 3M uses its profound scientific knowledge acquired in various fields for the development of powerful technologies. Collaboration ensures that the technologies are avail-able everywhere within the company for the development of products and solu-tions that improve the user’s everyday life in his work environment as well as at home. In this context, 3M Science and core technologies have been implement-ed in dental products. Among the long list of examples are nanotechnology, light reflection, adhesives and abrasives.

Whereas the benefit of these examples for dentistry seems to be quite obvious, there are other technologies based on 3M Science with an impact on clinical solu-tions that nobody will realize at the first glance, as shown in the following story.

How do you go from protecting electronics to preserving a giant squid?Imagine playing a video on your com-puter or calling your cell phone while

they’re submerged in a curious liquid that looks like water … or having the confidence to dunk your irreplaceable family photos in the mysterious fluid. Surprisingly, all would emerge un-scathed. That’s because 3M scientists invented a unique type of chemistry – 3M™ Novec™ brand fluids – that doesn’t

harm devices or memorable treasures. In fact, in many instances it’s used to protect them. There is no sleight of hand; this is 3M innovation at work. This seemingly magical fluid is virtu-ally harmless to electronic devices and evaporates completely without a trace of dampness or residue. It is no won-der then that the Novec fluid is used to safely extinguish fires in places that house our cultural treasures – places like the Alamo and the Library of Con-gress in the US or the Russian National Art Library.

Beyond the museums and archives, it’s likely that you encounter 3M Novec fluids every day. It’s used to clean elec-tronic devices and to minimize heat pro-duced by our computers and phones. But innovation applies to all things big and small, so it’s no wonder that the miraculous fluid used for that gadget in your pocket is also being applied to something as big as … a giant squid.

If you pay a visit to the Smithsonian Insti-tution’s Museum of Natural History in

Washington, D.C., you’ll easily encounter wide-eyed individuals who are awestruck when they see the 24-foot-long squid displayed in an enormous tank, neatly preserved by Novec chemistry. It is the magic of innovation that lets museum vis-itors clearly view the giant specimen be-cause, unlike alcohol, Novec fluid does not yellow or discolor the specimen.

Where is the link of this exciting development to dentistry?In addition to the above-mentioned fields of application, the fluid is even used in the manufacturing of dental implants, hypodermic needles and surgical instruments used in the dental office. The device manufacturers utilize Novec fluid for precision cleaning without residues.

The power of innovation is such that one simple idea can affect our daily lives in ways that are multiple and sig-nificant. Finding the right application, well, that’s just a matter of chemistry.

More innovation stories are available at http://www.3m.com/3M/en_US/Newsroom

ContactAlbert WaningSenior Technical Manager [email protected]

Exploring 3M Science. Applied to Life.Albert Waning, 3M Oral Care, Prague, Czechia

A giant squid can also be preserved by the innovative chemistry.

Mobile phone submerged in the miraculous fluid.

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oured composite restoration on her up-per right central incisor (Figs. 1 and 2). The character of the teeth was analysed closely using images taken under differ-ent light conditions. The image shows that it is relatively easy to read the inside of the tooth, which has varying opacities and a clearly visible mamelon structure, but no intensive intrinsic colours (Fig. 3). Therefore, it was decided to restore the tooth using a dual-layer technique with one dentin and one enamel shade plus the Clear Translucent shade of Filtek Supreme XTE restorative.

The use of additional stains included in the restoration was not necessary. For shade selection, the VITA classical A1-D4 shade guide was used (Fig. 4).

Alternatively, the individual shade guide produced with the desired composite material may be employed. It is important to select the shade when the teeth are hydrated and not yet isolated with rubber dam, as the colour of the dam and dry-ing may affect the natural tooth shade. In the present case, the shade A1 was de-termined. According to the StyleItaliano recipes, this shade is produced with Filtek Supreme XTE restorative shades A1D (dentin) and A3E (enamel).

A rubber dam was placed and the exist-ing restoration was removed. To provide for a smooth transition between restora-tion and tooth structure, a labial bevel was created with a red 3M™ Sof-Lex™ Contouring and Polishing Disc (Fig. 5). Subsequently, the available space and the shape of the tooth were checked with a silicone key (Fig. 6).

When a restoration is needed in the up-per anterior region of a patient with par-ticularly high aesthetic demands, many dental practitioners prefer indirect over direct restorative techniques. Reasons are a seemingly higher predictability and easier handling of the materials inside the mouth. However, it is possible to achieve beautiful results with little effort using di-rect composite materials as well – provid-ed that several basic rules are respected.

Rules for direct procedure successOne of the most important precondi-tions for high-quality outcomes is that the character of the tooth is analysed properly. In order to imitate its char-acter, a stable material with a high colour stability and a high strength for easy finishing and polishing should be selected. These properties are of-fered by 3M™ Filtek™ Supreme XTE Universal Restorative preferred by StyleItaliano™. In addition, an under-standing of the materials outside the mouth is essential for their successful intraoral use. This understanding is obtained by playing with different opacities and shades; and ideally by creating an individual shade guide. The StyleItaliano recipes and recom-mendations (e. g. the advice to always create an enamel layer of 0.5 mm strength) support the dental practi-tioner in obtaining great shade guide results and treatment outcomes.

Beautiful results possibleWith the StyleItaliano recipes and rules, any dentist is able to learn how to create direct restorations that fulfil high aes-thetic demands. The procedure is easily taught and learned and does not lead to an unpleasant surprise, as the case of a young female patient shows.

The patient had beautiful teeth, but the aesthetics of her smile were somewhat negatively affected by a small, discol-

Figure 2: The small discoloured restoration is visible and creates a disharmony in the overall picture. The proportion of the tooth is not ideal, either.

Figure 4: Shade selection with the two options A1 (left) and B1.

Figure 1: Beautiful teeth of the young female patient.

Figure 3: Analysis of the teeth’s character: The adjacent tooth shows different opacities including highly translu-cent areas on the incisal edge, but no intrinsic colours to be imitated.

Figure 5: Creation of a smooth, beveled surface.

Simple and beautiful: Dual-layer technique in the anterior regionPaulo Monteiro, Caparica, Portugal

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It is possible to check and – if neces-sary – adjust the available space with the Misura Instrument (LM Arte). At this stage of the treatment, the shade of the dentin core appears to be slight-ly too light. However, the final enamel layer in a darker A3E shade masks this effect reliably, as shown in Figure 13.

Making provisions for a strong bondThe adjacent teeth were protected with PFTE tape when etching gel with 35 per-cent phosphoric acid was applied to the enamel for 15 seconds (Fig. 7). The etchant was thoroughly rinsed off with water be-fore the bond (3M™ Scotchbond™ Univer-sal Adhesive) was applied (Fig. 8), rubbed in for 20 seconds, air-dried until the solvent had evaporated and the adhesive layer did no longer show any movement and finally light-cured for 15 seconds.

Colour and the inner shape

Then, the thin palatal enamel layer was created with Filtek Supreme XTE res-torative in the Clear Translucent shade (Fig. 9). For the build-up of the interproxi-mal walls, the shade A3E (enamel) was used. Slick Bands™ XR Matrices (Garrison Dental) were placed in a vertical position between the teeth to ensure tight con-tacts and an anatomical shape of the res-toration (Fig. 10). When the interproximal and incisal walls were finished, the dentin core (shade A1D) was added and mod-elled to imitate the anatomical structure of the adjacent central incisor (Fig. 11). As a matter of course, every single layer of composite was light-cured before placing the next. The dentin core was covered with a layer of Filtek Supreme XTE restorative in the Clear Translucent shade to increase the translucency in the incisal area and to obtain a uniform surface with 0.5 mm space left for the final enamel layer (Fig. 12).

Figure 6: Checking the shape of the tooth with a silicone key.

Figure 7: Selective enamel etching of the prepared tooth structure.

Figure 8: Application of the universal adhesive.

Figure 9: Placement of the first palatal layer of composite.

Figure 10: Vertical use of a posterior tooth matrix to restore the mesial interproximal wall.

Figure 11: The dentin core is created and mamelons are added to copy the natural look of the left central incisor.

Figure 12: Placement of a layer in the shade Clear Translu-cent to lay the foundation for a uniform thickness of the final enamel layer.

Figure 13: Situation prior to finishing and polishing.

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tioner has developed a thorough under-standing of the employed materials. In-stead of magic, it is precise preparation and careful planning that leads to the desired, repeatable and therefore pre-dictable outcomes loved by the patient.

The difference between the adjacent natural teeth and the restoration was virtually imperceptible and there was no visible junction between enamel and dentin in one section of the tooth and the composite material in the other.

Simple and predictable techniqueThe described technique is easily taught and learned. It enables every dentist to obtain beautiful results despite a highly efficient procedure. However, these results are only achieved if high-quality materials are used and if the practi-

Texture and the outer contourThe beauty of a restoration is not only determined by its colour and precise imitation of the natural anatomy with its convex shapes and different opacities, but also by its outer contour and texture. Thus, the finishing procedure is highly important. In the present case, Sof-Lex discs were used for contouring and tex-turing (Fig. 14).

Afterwards, the 3M™ Sof-Lex™ Diamond Polishing System was employed to ob-tain a natural gloss. The beige spiral was used for pre-polishing (Fig. 15), followed by the pink one developed for the crea-tion of a paste-like gloss (Fig. 16). Ex-perience shows that even better results are achievable in this final step when the spiral is used in combination with water. Figure 17 shows the outcome im-mediately after polishing.

When the rubber dam was removed, a dark triangle was visible between the anterior teeth due to the manipulation of the soft tissue (Fig. 18). After several days, the tissues had recovered and a beautiful overall picture was obtained (Figs. 19 and 20).

Figure 15: Pre-polishing with the beige spiral.

Figure 16: High-gloss polishing with the pink spiral and water.

Figure 17: Restoration after the finishing and polishing procedure.

ContactPaulo Monteiro DMD, MScCoordinator and Professor, Aesthetic and Restorative Dentistry Post-graduation program at [email protected]

Figure 18: The restoration is beautiful, while the soft tissue needs some time to recover.

Figure 19: Treatment result several days after the treatment.

Figure 20: Beautiful smile of the young and pretty patient.Figure 14: Contouring with the proven 3M™ Sof-Lex™ Con-touring and Polishing Discs.

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Competition in SeefeldOn September 11 to 13, 2016, a group of 14 students who had won the competition at their university in the CEE region came to 3M in Seefeld, Germany for a regional competition. The event was kicked off with an informal welcome dinner, where connections started to form between the students quickly, creating a homogeneous group. The next day began with an introduction to 3M Research & Development, followed by a company tour. Then, the students gave their presentations of 7 to 10 minutes focusing on their winning clinical case. They were judged on case complex-ity, outcome, photography skills, slide design, and presentation skills. The jury was pleasantly surprised at the quality of many of the presentations. In the last session, the students shared their fresh ideas regarding a product in development. The pro-gram during the second day was a mix-ture of lectures and workshops, including a presentation skills training. Finally, the winner of the competition was announced and received a 3M™ Elipar™ DeepCure-S LED Curing Light.

Join the program!The feedback of the participants was very positive. They leveraged the networking opportunities and seized every chance to improve their skills. The program is being continued, with Burcu Sat Dedeler, Marketing Man-ager CEE and Albert Waning, Senior Technical Manager CEE at 3M being an integral part of the organizing team. Students interested in participating are invited to visit the website www.dentistofthefuture.3m.com for addi-tional information.

Life is not always easy for dental stu-dents and young dental professionals: They have to obtain an overview of the available products, have to stay ahead of the continual changes being made in both materials and techniques and need to develop their own preferences and ways of practicing the profession. In order to support them in reaching this goal, 3M developed the Dentist of the Future program in 2015.

Scientific and clinical contentThe idea behind this program is to help students improve their skills and knowledge by delivering relevant scientific and clinical content online and through lectures and workshops. Students enrolled in the program are provided with a Dentist of the Future Kit containing selected materials for direct and indirect restorative procedures, which may be tested and used for case

documentation. In return for receiving the materials free of charge, the young professionals are asked to document and upload direct and indirect clinical cases to the Dentist of the Future web-site. These cases can be viewed and commented on by other students en-rolled in the program, who can also post questions and interact with each other. At the end of each academic year, stu-dents compete, on the university level in each country, for the best clinical case posted. The winner, selected by each university, advances to a regional competition.

ContactDr. Shira Zary, DMDSr. Scientific Affairs & Education [email protected]

Website www.dentistofthefuture.3m.com with helpful videos, presentations and literature as well as clinical cases helping to improve knowledge and skills.

Group of students from the CEE region participating in the competition.

Helping young dentists to be equipped for the futureShira Zary, 3M Oral Care, Herzlia, Israel

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3MSM Health Care Academy

Useful hintsFor those who are interested in participating, we have collected some useful hints from former Talent Award winners. Dr. Katharina Kuhn, senior physician at the Department of Prosthetic Dentistry at Ulm University, Germany, won the award in 2013. She reports: “In my opinion, the secret of success lies in being very well prepared. A well-structured presentation that is adjusted to the pre-set timeframe of your lecture is more important than your research topic. What is also deci-sive is that you visualize the content using images and animations which are easily comprehensible, while the text should be reduced to a minimum. I am sure that those who respect these hints and take their time to practice lecturing will be successful. Anyway, your motivation for participation should rather be the opportunity to gain experience and establish or expand your network than to win a competition.”

Wiebe Derksen, PhD student at the Academic Centre for Dentistry Amsterdam, the Netherlands, who is also working in a dental practice and won the Talent Award in the scientific research category in 2015, observed that “some of the lectures seemed to be slightly too theoretical, since the question the jury brought up most frequently focused on the clinical relevance of the selected study.” His advice for future con-testants: “Be prepared for critical questions of the jury and stay calm during the dis-cussion. You should think about the link of your research topic, the test methods, and the obtained results to the practical world in advance: Those who are able to explain the value of their work for the general dental practitioner will be one step ahead of the rest.”

Finally, a very encouraging comment comes from Dr. Ali Salehi, (winner of 2015 in the clinical category). He is a clinician with a dental office in Strasbourg, France, and an Assistant Professor at the Department of Prosthodontics of the University of Strasbourg Dental School. “I can recommend participation to anyone who would like to improve his skills. The insight into the work of others opened up new

Wanted: Talented young dental professionals!Armin Bock, 3M Oral Care, Seefeld, Germany

On October 17 and 18, 2017, talented young dental professionals are given yet another opportunity to prove their lecturing skills, expand their own net-work and learn from like-minded peo-ple. The occasion: the 3MSM Health Care Academy Talent Award that takes place for the 14th time in Seefeld, Germany.

The international speaker competition is open to two groups of professionals: young researchers and teachers who graduated as dentists or scientists no longer than five years ago and are cur-rently working at a university and clini-cians working at a university or in a dental office who graduated as a dentist maximally seven years ago. The first group is invited to present their scientific research results, whereas the second group is asked to focus on clinical results in a 15 or 20-minute lecture.

The short presentations will be given in English language and evaluated by an international jury composed of inde-pendent clinicians and researchers in-cluding the previous award’s winner as well as 3M scientists. Important criteria for evaluation include the relevance of the selected topic, the quality of the presented clinical case or research pro-ject, the participant’s presentation skills and his or her development potential.

Venue of the Talent Award: 3M in Seefeld, Germany. Aerial image Seefeld: © Dr. Jörg Bodenbender

The 3M site in Seefeld.

Dr. Katharina Kuhn, University of Ulm, Germany.

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perspectives for me and triggered a different way of thinking. The event and the opportunities I had after it have opened my eyes for new aspects in my personality and helped me to grow personally and professionally.”

How to registerIn order to register, please submit personal information, a short curriculum vitae and an abstract or summary of the planned content of the lecture until September 4, 2017.

The registration form is available online at www.3MESPE.de/Uni and may be sent to 3M via email.

ContactDr. Armin Bock, Professional Service Manager & General Manager CIC [email protected]

Dr. Ali Salehi, Strasbourg, France.

Talent Award winner redeeming his prize in Australia

In 2015, the 3M Talent Award winner Wiebe Derksen was awarded a financial sponsorship for a three-month stay at a foreign university for scientific research abroad. He went to Melbourne, Aus-tralia to work both at university and in the practice of Dr. Christopher Evans, an ITI research fellow. “Christopher and I used our time together to describe my scanning protocol for digital implant impressions of anterior restorations us-ing the 3M™ True Definition Scanner. The idea is to ensure an exact transfer of the emergence profile of a temporary crown into the digital world, which is possible with our Triple Scan Tech-nique. The first scan is used to capture the arch with the implant and the provi-sional restoration on it. The second scan – a complete capture of both arches – is carried out with a Straumann® CARES® Mono Scanbody in place, while in the third step, the temporary crown including its submucosal portion is scanned extraorally. Matching of the three data sets enables us to transfer 3D information of the emergence pro-file into the software and design the final restoration in the desired shape.”

Both clinicians are employing very simi-lar digital workflows in their practices and were able to benefit from each other: “Christopher and I were encoun-tering exactly the same problems in our digital procedures. Sharing our experi-ence and ideas, we were able to de-velop strategies that help us overcome many of these challenges.” The Triple Scan Technique visualized.

At the Melbourne University School of Dentistry, Wiebe Derksen came across treatment strategies and philosophies that were very different from what he learned in the Netherlands. The differ-ent perspectives were shared and this led to fruitful discussions interesting for both sides. Together with Dr. Jaafar Abduo, Wiebe developed a 3D-analysis protocol for evaluating wear of mono-lithic zirconia restorations in a clinical study. “The data to be analyzed is al-ready available: We have got intraoral scans of about 60 patients who re-ceived monolithic zirconia restorations. The situation was scanned immediately after the restorative procedure and one year later. In the protocol, we de-termined how to compare these scans and measure the wear on the antagonist teeth. We already started with the first measurements in Melbourne, and I will continue with the project in Amsterdam now.”

He would like to thank 3M for the opportunity to work with and learn from experienced practitioners and researchers in Australia, where he was able to lay the foundation for future collaborations.

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In order to enable the high cure depth of bulk fill restoratives (ap-plied in layers of 4 or even 5 mm), the products available so far have a higher translucency than universal composites. In some cases, however, this can compromise the aesthetic appearance, especially when the underlying tooth structure shows discolora-tions. Based on this feedback from the market, our team initiated a new project: The development of an aesthetic bulk fill material which offers an increased opacity while maintaining the great properties and depth of cure of Filtek Bulk Fill Posterior.

How did you proceed in the early stages of development?

In principle, it’s all about getting the blue curing light as deeply as possible into your material, and using the quickly decreasing light intensity at the bottom of the cavity more efficiently. This contradicts the traditional way of increasing opacity by adding a white pigment. This has a negative effect on the depth of cure.

During ideation and initial testing, we came up with a totally dif-ferent approach: A smart change in the compositional behaviour on cure. This led to the desired effect – a higher opacity without a reduction in depth of cure. We call this Smart Contrast Ratio Management.

Development of a new bulk fill restorative with increased opacityFrédéric van Vliet, 3M Oral Care, Seefeld, Germany

In fall 2014, the bulk fill material 3M™ Filtek™ Bulk Fill Posterior Restorative was launched. With this innovative product, 3M succeeded in addressing the dental practitioners’ major con-cern, which was that clinical issues might arise from an incom-plete cure or insufficient marginal adaptation of the materials placed in a bulk. Meanwhile, clinical experience and scientific studies show that these worries are unfounded when Filtek Bulk Fill Posterior Restorative is used according to the manu-facturer’s instructions.

Now, after two and half years, 3M is proud to present a successor which addresses additional customer needs. We had a conversation with Karsten Dede about the reasons to initiate the new development project, the unique features of 3M™ Filtek™ One Bulk Fill Restorative and the benefits re-sulting from its use in the dental office. Karsten is a Product Development Specialist at 3M Oral Care in Seefeld, Germany and has joined the R&D team responsible for composite and adhesive development 21 years ago.

Karsten Dede, Filtek Bulk Fill Posterior Restorative contains 3M’s true nanofiller technology as well as innovative meth-acrylate monomers ensuring lower shrinkage and stress relief. What happened that 3M decided to change this suc-cessful material so quickly after its launch?

Filtek Bulk Fill Posterior Restorative is a material with very good mechanical properties combined with a low shrinkage stress. Dentists love its handling and use it to simplify their posterior restorative procedures. Its high strength and wear resistance allow placement in one increment up to the occlusal surface, without the need for a capping layer consisting of a universal composite.

The new product: 3M™ Filtek™ One Bulk Fill Restorative.

Karsten Dede, Advanced Product Development Specialist at 3M Oral Care in Seefeld, Germany.

Opacity of 3M™ Filtek™ Bulk Fill Posterior Restorative (left) and 3M™ Filtek™ One Bulk Fill Restorative (right). (Shade: A2, thickness of specimen: 2.6 mm)

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ContactFrédéric van Vliet Western European Professional Services [email protected]

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Would you please give a more detailed description of this approach?

Smart Contrast Ratio Management is a concept where, by managing the interaction and refractive index between the resin and the filler, the opacity of the composite can be increased without sacrificing the depth of cure. Contrast ratio is the measurement of the degree of opacity or translu-cency. The higher the contrast ratio, the more opaque the material will be.

3M Filtek One Bulk Fill Restorative utilizes novel proprietary 3M nanotechnology to alter the opacity of the composite ma-terial during cure. The ability to have an uncured paste that is more translucent than that of the final cured paste allows light to penetrate deeply into the restorative material, activating the cure chemistry throughout the composite, allowing the depth of cure to be thus achieved. The material, however, changes in contrast ratio during cure due to a scientifically designed in- situ creation of a refractive index mismatch which also allows the cured material to have a greater final opacity for improved aesthetics of the restoration.

Were the mechanical properties of the material affected by this change in the system?

No, due to this innovative change, Filtek One restorative has all the existing properties of its predecessor, with the addition of higher, more natural opacity for enhanced aesthetics. This makes it an outstanding material for posterior restorations. The polymerization shrinkage of the new material is equivalent to Filtek Bulk Fill Posterior and lower than that of many other bulk fill materials. In addition, Filtek One restorative has similar polymerization stress when placed in a bulk compared to many of the universal materials that are placed in 2 mm increments. Flexural strength, fracture toughness and wear resistance are higher compared to many competitive universal composites.

What is your conclusion with regard to the development project?

The product is the result of a successful collaboration of a cre-ative team based in Saint Paul, Minnesota and Seefeld, Ger-many. The project benefitted hugely from the combination of different perspectives and expertise of the developers based in the two locations, which led to fruitful discussions and a quick progression from ideation to product introduction. In the dental office, the product will offer the proven clinical benefits like the great handling and efficient procedure, while it now also fulfills the users’ needs in terms of aesthetics.

Effect of the smart contrast ratio management technology on the translucency of dental restorative materials.

= Refractive index mismatch

= Refractive index match

= Potential scattering site

= Light ray

Refractive index does matchRefractive index does not match

Incoming light Incoming light

Scattering of blue light – reduced intensity at bottom. Reduced scattering by smart contrast ratio management technology.

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Amalgam replacement using a new bulk fill restorative with increased opacityGiuseppe Marchetti, Parma, Italy

Day in, day out, patients present in dental offices with the need for restora-tive treatment in the posterior region. Every time, we have to decide whether a direct or indirect treatment approach is best suited for the specific case. Sup-port for making the right decision is of-fered by StyleItaliano™. According to the group, minimally invasive direct tech-niques should be preferred whenever possible. Thus, there is no indication for inlays, while overlays should be chosen instead of crowns in cases with severely decayed tooth structure (e. g. following endodontic treatment).

Direct composite restorations are not only preferred due to maximum preser-vation of healthy tooth structure. They also show a high clinical success over time, provided that the basic rules in-cluding proper isolation of the working field and correct use of adhesive tech-niques are respected during treatment. In addition, innovative restorative mate-rials like bulk fill composites enable the dental practitioner to adopt an efficient procedure.

Efficient procedure, aesthetic resultsWith the most recent innovation, 3M™ Filtek™ One Bulk Fill Restorative, even the aesthetic impairment caused by a higher material translucency is a thing of the past. A true sample of this en-hancement is shown in the following clinical case. The maxillary right first molar of this patient was restored with an insufficient amalgam restoration that had to be replaced, while the adjacent premolar showed a primary carious lesion needing treatment.

Figure 3: Final preparation after complete removal of the amalgam restoration and caries.

Figure 4: Adaptation of a sectional matrix. Figure 5: Selective enamel etching using 3M™ Scotchbond™ Universal Etchant for 15 seconds.

Figure 1: Initial situation: First molar with insufficient amalgam restoration and premolar with primary caries lesion.

Figure 2: Placement of rubber dam and separation of teeth with a wedge for easier preparation access.

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Figure 6: Application of 3M™ Scotchbond™ Universal Adhesive. It is rubbed in for 20 seconds, air-dried until the solvent has evaporated and light cured for 10 seconds.

Figure 7: Direct application of 3M™ Filtek™ One Bulk Fill Restorative in the shade A2 into the cavity. As the material may be placed in layers of up to 5 mm thickness, one incre-ment is sufficient to fill the cavity.

Figure 8: Restoration directly after light curing from the occlusal, buccal and lingual surfaces for a minimum of 10 seconds each with the 3M™ Elipar™ DeepCure-S LED Curing Light.

Figure 9: Polishing with the 3M™ Sof-Lex™ Diamond Polish-ing System. It works very well on moist surfaces and does not need paste to obtain a natural gloss.

Figure 10: Final occlusal check. The bulk fill restorative has a tooth-like opacity and colour.

Figure 11: Final restoration at a check-up visit. Smooth and high-gloss restoration surface for a natural aesthetic appearance. Different from other bulk fill materials, the discoloured underlying tooth structure does not shine through.

ContactDr. Giuseppe Marchetti, DDSCo-owner of Studio Dentistico [email protected]

ConclusionThis case shows that – if a dental practitioner follows some simple rules and protocols and selects high-quality materials – it is easy to obtain brilliant treatment results in terms of aesthetics and function. This is what StyleItaliano refers to as feasible, teachable and re-peatable dentistry.

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The 3M™ Mobile True Definition Scan-ner is the first intraoral scanner that operates solely on a tablet. With this in-novation launched in late 2016, intraoral scanning (digital impression taking) in dental and orthodontic offices is taken to the next level.

In order to learn more about the new device and its benefits, we had a con-versation with James Graham, Global R&D Director, responsible for new prod-uct introductions in the field of elec-tronics and software at 3M Oral Care. He has been deeply involved in the development projects of both the 3M™ True Definition Scanner and the 3M™ Mobile True Definition Scanner.

What was the main idea behind the de-velopment of a tablet-based intraoral scanner?

While the cart version of the 3M True Definition Scanner is portable, it is clear that a more compact design of the workstation would enable the user to move between operatories or different dental offices more easily. We wanted to develop a device that offers exactly this benefit, while also enhancing patient engagement in the planning phase at the same time. A tablet-based intraoral scanner seemed to be the ideal solution. If a clinician would like to use it in a dif-ferent room or building, one just grabs it and walks over. For patient education

Tablet-based intraoral scanning: A small innovation making a huge differenceNaveen Kumar, 3M Oral Care, Loughborough, United Kingdom

and communication, the tablet is simply handed to the patient, who can have a look at the easy-to-understand visual representation of the oral anatomy and interact with the device. This will lead to a better understanding of the treatment plan and – as a consequence – to treatment plan acceptance.

What are the differences between the mobile device and the cart-based intraoral scanner?

In fact, there are more similarities than differences: The scanning wand and the software applications used to capture precision digital data as well as the scanning experience are identical. This leads to the fact that both systems offer the same accuracy and quality of the scans, and the same workflow options. These options include an STL output function that allows for virtually unrestricted use of the captured data and a number of diverse Trusted Connections – i.e. workflows with validated interfaces between the intraoral scanner and CAD/CAM components of partner companies.

Differences lie in the design, dimensions and interior of the workstations: The 3M Mobile True Definition Scanner workstation is more compact, and provides for more mounting options within the operatory. Scanning speed remains the same, and both platforms rely on the 3M™ Connection Center, where all data is uploaded and is accessible anywhere and anytime. Thus, the differences a user is likely to notice every day are in its compact design and the further enhanced patient experience.

You mentioned the Trusted Connections. Would you please provide an overview of the validated workflows currently available?

Right now, CAD software integration is available for the 3Shape Dental System™, Dental Wings® DWOS® and exocad® DentalCAD. Physical models may be ordered at Dreve via a Trusted Connection, and there are validated workflows available for the fields of implantology and orthodontics. Our partners in implant prosthetics are the companies Straumann and Zimmer Biomet (with the BellaTek® Encode® Impression System). The integrated orthodontic solutions include the Invisalign® workflow (Align Technology) and – last but not least – the 3M™ Incognito™ Appliance System for lingual orthodontic treatment. Additional validated workflows may be available regionally. Information about these options is offered on the local 3M website.

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James Graham, Global R&D Director at 3M Oral Care.

The 3M™ Mobile True Definition Scanner.

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As a last step, we focused on battery management to ensure that the system could be operated while plugged in or un-plugged.

What is your conclusion regarding the new 3M Mobile True Definition Scanner system?

With the new mobile system, we succeeded in developing a completely new platform that we will continue to build upon. You will not be surprised to hear that we are already working on additional capabilities and features of our intraoral scan-ners that will open up new opportunities for our customers. One aspect we will continue to expand upon is the number of Trusted Connections.

We will keep you informed!

What were the major tasks to be fulfilled during the development of the 3M Mobile True Definition Scanner?

At first, we had to identify a housing that allows the user to easily move the device throughout the office, could withstand rigorous cleaning and disinfection regulations, and provide physical protection of the device against accidental drops and mishandling. In order to develop the most suitable solution, we collaborated with the recently formed 3M Design Team. Together, we developed and tested different options and finally selected a tablet and a custom-designed housing solution with an integrated VESA mount and carrier specifically modified to meet our unique requirements.

When we had selected the tablet, we worked on improving the performance of the 3M True Definition Scanner Software to enable it to run on a tablet. As we did not want to reduce the amount of data captured with the wand, we had to find a different way of leveraging the data in a small form factor. In addition, we optimized the interfaces between the tablet’s operating system and the scanner software to ensure the desired speed and high-quality results.

ContactNaveen Kumar Digital Business Development Manager - Western [email protected]

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Different design concepts developed by 3M and evaluated by clinicians during the concept phase.

Doctor and patient with the tablet-based intraoral scanner in their hands.

The 3M™ Mobile True Definition Scanner.

Person carrying the 3M™ Mobile True Definition Scanner around.

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The impression procedureFor the implant impression, a second-generation scanbody (type T 1405) was fixed to the implant (Fig. 2). OptraGate (Ivo-clar Vivadent) was used to retract the lips and cheeks, the teeth in the lower jaw were air-dried and 3M™ High-Resolution Scanning Spray was applied to take a high-precision impres-sion with the 3M™ True Definition Scanner (Fig. 3).

The procedure was carried out for both jaws. Finally, a bite registration was taken. Figures 4 and 5 show the scanning re-sult on the touchscreen of the intraoral scanner. In the present case, the scanning time was 57 seconds for the mandible and 96 seconds for the maxilla including the scanbody. The quality of the scan may be checked in detail before the data is up-loaded to the 3M™ Connection Center (Fig. 6).

The first intraoral scanners with open interfaces were launched several years ago. Despite the availability of the cap-tured data in the industry-standard STL format, however, their use was initially limited. The reason was that often, several im-portant links were missing in the process chain. This was par-ticularly true for the field of implantology with its diverse im-plant systems and prosthetic platforms.

Implant impressionsIn order to capture implant positions with an intraoral scanner, sterilisable intraoral scanbodies are required. They are slightly different for each implant type and diameter. Since a physical model is needed, a CAD software with a model builder mod-ule must be used in the dental laboratory. Another highly im-portant precondition is the availability of laboratory analogues for printed models which can be precisely repositioned and offer a high radial and axial positional stability. Last but not least, the geometries of scanbodies and compatible titanium bases must be available for download and import into the de-sign software.

Today, scanbodies, implant analogues and corresponding component libraries are available for many implant systems. The whole package is offered by the German manufacturer Medentika for implant systems of all popular implant manu-facturers including bredent, Dentsply Sirona, Nobel Biocare, Straumann and Zimmer Biomet. The workflow from scanning to placement of the prosthetic work is described using a case with a single implant replacing a maxillary premolar.

The initial situationTooth 24 (FDI notation) of a 30-year-old female patient could not be preserved after an unsuccessful root canal treatment (Fig. 1). The tooth was extracted and a XiVE S® Implant (Dent-sply Sirona) with 3.8 mm diameter placed.

Digital implant impressions – an updateChristoph Niesel, Karlsruhe, Germany

Figure 1: Pre-operative radiograph with the first premolar to be extracted.

Figure 2: Scanbody in place.

Figure 3: Ready for scanning: the teeth in the lower jaw are dusted with scanning spray.

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The design stepsIn the dental laboratory, the impression data was downloaded in the STL format and imported into the software Dental Wings® DWOS® . At first, the technician has to define the planned type of restoration (abutment) and the desired restorative material (3M™ Lava™ Plus High-Translucency Zirconia). In addition, the implant kit has to be specified: This kit includes the required construction components (scanbody, implant analogue and titanium base) and

can only be selected from a dropdown menu in the order mask after download of the library from the Medentika website. The libraries are available for the CAD software solutions 3Shape Dental System™, DWOS and exocad® DentalCAD and can be downloaded free of charge by registered users. In the present case, the T1005 kit was selected.

Subsequently, the DWOS Model Builder was started and the model of the upper jaw selected. In order to produce a precise model with a highly accurate implant position, it is essential to replace the scanned scanbody with the construction compo-nent available from the library. This task is accomplished using the 3-point repositioning functionality (Fig. 7).

The compatible virtual implant analogue was placed automati-cally and a cut-out was created around the implant (Fig. 8).

Figure 4: Virtual three-dimensional model of the lower jaw.

Figure 5: Virtual three-dimensional model of the upper jaw including the scanbody.

Figure 6: Close-up view of the scanbody in 2D; a 3D view is also available.

Figure 7: 3-point repositioning of the scanbody in the model builder module.

Figure 8: Defining the area for the cutout in the software.

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This prevents any positional change of the analogue in the model and thus contributes to a high process reliability. Sub-sequently, the titanium base was positioned on the model (Fig. 13) and the zirconia part was glued to it (Fig. 14). The abutment was finalized using veneering porcelain (Fig. 15). Finally, this crown was fixed to the implant and the screw access hole filled with composite material (Fig. 16).

The software enables the user to add artificial gingiva, howev-er, not all companies producing 3D-printed models are cur-rently able to print flexible gingiva as well.

In the same process, the abutment was designed. For this pur-pose, the module is simply changed from DWOS Model Build-er to DWOS Implant Prosthetics. In order to control the space left for the veneering ceramic and allow for an anatomic framework design, the abutment was first designed in full contour (Fig. 9) and then automatically reduced to the frame-work. The final design is shown in Figure 10.

The final componentsThe model produced by Innovation Meditec, the construction components from Medentika and the zirconia part of the abut-ment arrived in the laboratory. The laboratory analogue comes with an adapter that ensures easy insertion into the model (Fig. 11). When it is placed, the user feels that it clicks into place (Fig. 12).

Figure 11: Laboratory analogue and adapter.

Figure 12: Laboratory analogue in the printed model.

Figure 13: Titanium abutment base placed on the analogue.

Figure 9: Full-contour design of the abutment on a pre-fabricated titanium base selected from the library.

Figure 10: Abutment ready to be produced.

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component manufacturers are currently working at full speed to develop the missing links in the process chains.

Thus, the range of indications for intraoral scanners such as the 3M True Definition Scanner and the brand-new tablet-based 3M™ Mobile True Definition Scanner is continuously in-creasing. Different from the Trusted Connections that work smoothly with the touch of a button, however, the use of open workflows still requires some developmental work driven by the dentist and the dental technician to ensure high-quality outcomes.

Once a workflow is implemented, this high quality and accura-cy is achieved regardless of who is using the device, as con-firmed by my partner who was less enthusiastic about scan-ning in the beginning, while he uses the device frequently today.

DiscussionThe described case shows that there are more and more benefits arising from the use of an intraoral scanner with the option of data output in the open STL format. Software and

ContactDr. med. dent. Christoph NieselCo-owner of the dental office Dr. Christoph Niesel & Dr. Johannes [email protected]

Figure 14: Abutment made of zirconia glued to the titanium base.

Figure 15: The abutment crown ready for placement.

Figure 16: Treatment result.

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Following a simpler path from prep to crownCarlos Eduardo Sabrosa, Rio de Janeiro, Brazil

Indirect restorative procedures can be time-consuming and complicated: Many different processes from impression tak-ing to cementation are carried out in the dental office, and in each of them, different strategies may lead to success.

However, some of the available materials and techniques will involve a lot of effort, while others enable users to proceed quickly and simplify the complete procedure. A simplified workflow from prep to crown that really makes life easier for the dental practitioner is described below.

Figure 1: Initial situation. The failed composite restoration covering a large part of the left mandibular first molar’s occlusal surface needs to be replaced.

Figure 2: Due to the size of the restoration, the amount of remaining tooth structure might not be sufficient to ensure the required stability for a direct composite restoration.

Figure 3: Upon removal of the old filling, it becomes clear that a crown is needed to ensure the required stability. The tooth is built up with 3M™ Filtek™ Bulk Fill Posterior Restorative, which may be placed in conjunction with 3M™ Scotchbond™ Universal Adhesive and in increments of up to 5 mm.

Figure 4: Following tooth preparation, a temporary crown is produced chairside with 3M™ Protemp™ 4 Temporization Material. This material exhibits a high strength and a natural gloss without polishing.

Figure 5: One week after the preparation procedure, healthy soft tissue conditions are obtained. They lay the foundation for a high-quality precision impression.

Figure 6: In order to allow for a detailed capture of the preparation margin, the gingival tissues are retracted using the double-cord technique. Alternatively, a single cord may be applied in combination with 3M™ Astringent Retraction Paste.

Figure 7: Monophase impression taken with 3M™ Impregum™ Penta™ Soft Medium Body Polyether Impression Material. A very detailed representation of the preparation margin is obtained with this simple technique.

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CommentsThe described patient case shows that it is possible to sig-nificantly reduce the number of working steps in an indirect restorative procedure. In this way, potential sources of error are eliminated and chair-time is decreased. Key to success is the use of innovative, high-quality materials that offer ease of use and lead to increased efficiency in the dental office. These include the above-mentioned monophase impression material, the bulk fill composite, the temporization material that does not require polishing and the self-adhesive resin cement all of-fered by a single manufacturer.

ContactCarlos Eduardo Sabrosa DDS, MSD, DScDUniversity of the State of Rio de Janeiro Associate [email protected]

Figure 8: Situation at intraoral try-in of the crown. It is made of a 3M™ Lava™ Zirconia coping and an IPS e.max® Ceram (Ivoclar Vivadent) porcelain layer. Ideal intraoral conditions (smooth margins, healthy tissues) are visible.

Figure 9: Sandblasting of the crown’s intaglio surface to create a microretentive surface structure that is beneficial for cementation. This procedure is recommended for oxide ceramic materials.

Figure 12: At the check-up several days after crown placement, a great overall picture is obtained. The patient is happy with the final restoration in terms of aesthetics and function.

Figure 10: Application of self-adhesive resin cement into the crown. This proven product offers a simplified procedure since it eliminates the need for separate etching, priming and bonding.

Figure 11: Situation after crown placement, removal of the excess cement and thorough cleaning. The crown blends in nicely with the surrounding tooth structure.

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In the past 15 years, oxide ceramics have evolved from white-opaque mate-rials used to produce crown and bridge frameworks to highly translucent, tooth-coloured ceramics perfectly suited for the manufacture of monolithic restora-tions. With the recent launch of 3M™ Lava™ Esthetic Fluorescent Full-Contour Zirconia, the first zirconia material with inherent fluorescence is available. This property, combined with an exception-ally high translucency and a built-in col-our gradient for true shade match with the VITA classical A1-D4® shade guide, ensures that brilliant aesthetics can be achieved in the dental laboratory with less effort.

Goal of developmentIn order to create a new full-contour ceramic that combines the benefits of glass ce-ramic and oxide ceramic materials, 3M brought together a team of chemists, engi-neers and dental technicians. The idea was to integrate translucency, colour and fluo-rescence into the structure of an oxide ceramic restorative material to reach this goal.

The microstructureWe started the project with the search for an approach to further increase the trans-lucency of zirconia compared to 3M™ Lava™ Plus High-Translucency Zirconia. The strategy used for Lava Plus – an optimization of the alumina content and distribution – had reached its limit so that a further improvement was not feasible with this meth-od. Therefore, we decided to develop a material with a different microstructure.

Zirconia has a polycrystalline structure, and zirconia-based restorative materials may exist in three distinct crystalline phases (characterized by a specific arrangement of the Zr and O atoms): monoclinic, tetragonal and cubic. By the addition of yttrium ox-ide, the crystals can be stabilized in the desired phase.

Lava Plus Zirconia with 3 percent yttria has a predominantly tetragonal structure, re-sulting in a high strength, but also in a translucency insufficient for some indications. In order to change the microstructure and allow for an optimization of the translu-cency, the yttria content was increased to 5 percent in Lava Esthetic Zirconia. This leads to a stabilization in the cubic phase. The cubic crystals have isotropic optical properties, resulting in less scattering of incident light – the material is perceived as much more translucent. The change in the microstructure also has an impact on the material strength: The strength of cubic zirconia is lower than that of tetragonal zirconia, but it is still higher than that of glass ceramics including lithium disilicate. For Lava Esthetic Zirconia, a 3-point bending strength of 800 MPa was measured (test method according to ISO 6872:2015) *. This value is higher than that of other leading cubic zirconia-based restorative materials. Lava Esthetic Zirconia also has a

Insights into the development of a new oxide ceramic restorative materialMichael Jahns, 3M Oral Care, Seefeld, Germany

Backlight images of monolithic molar crowns show the difference: The translucency of a crown made of 3M™ Lava™ Esthetic Zirconia (left) is significantly higher compared to a crown made of 3M™ Lava™ Plus Zirconia (right).

number of other beneficial properties, including sufficient stability for conven-tional cementation, efficient milling and easy adjustability of the restorations.

The optical propertiesWhile cubic zirconia has already proven its worth in dentistry when used for the recommended indications (single tooth restorations and three-unit bridges), built-in fluorescence is a completely new feature for dental zirconia. In com-bination with the included colour gradi-ent, this saves a lot of time in the dental laboratory, since several work steps in-cluding the application of shading liq-uids and fluorescent effect shade as well as drying of the restorations are eliminated. Furthermore, the shade and fluorescence effect coming from inside the material offers optical benefits, be-cause the optical properties of natural teeth are imitated even more precisely.

Overcoming challengesDuring the development of Lava Es-thetic Zirconia, we had to overcome two main challenges, as we integrated colour and fluorescence into the ma-terial structure by incorporating differ-ent additives into the zirconia powder prior to disc production. First, we had to ensure a high chemical homogene-ity of the ingredients (zirconia, alumina and yttria plus the aforementioned additives for colour and fluorescence)

3M™ Lava™ Esthetic Fluorescent Full-Contour Zirconia is available in discs with standard diameter (98 mm) and three different heights (14, 18 and 22 mm).

* 3-point bending strength according to ISO 6872:2015; qualified for Type II, class 4; indications: crowns, bridges with one pontic between two crowns, inlays, onlays and veneers.Lava Esthetic has a flexural strength higher than 500 MPa which is the recommended limit to be qualified as Type II, Class 4 according to ISO 6872:2015.

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inside the milling blanks to obtain the desired, controlled aesthetic effect. This homogeneity is also responsible for the material’s comparatively high mechanical strength.

Second, we had to choose the most suitable additives for colour and fluorescence (certain additives for shading may prevent a fluorescence effect) and determine the correct concentration of each additive for every single tooth shade and in dependence of the position in the disc (enamel, transition, dentin area). Since the optical effects of shade and fluorescence interact with each other, this procedure required intensive testing and adjustment. We had to ensure a precise shade match with the VITA classi-cal A1-D4 shade guide and a fluorescence match with natural teeth. For this purpose, the dental technicians in the development team fine-tuned each additive concentra-tion. In order to be able to evaluate the result, every new formula had to be pressed into blanks and then sintered as the optical properties are only visible in the final mate-rial. Currently, Lava Esthetic is available in eight different shades (Bleach, A1, A2, A3, A3,5, B1, C1 and D2); more shades with precisely adjusted fluorescence are already being developed.

Benefits for the userWe are sure that this complex process of development and adjustment has a posi-tive effect the users in practice and labo-ratory will benefit from: The restorations have a natural appearance immediately after processing. The need for time-con-suming work steps of manual individuali-zation and characterization is eliminated. This will result in lower production costs, increased efficiency as well as shorter production times. The aesthetic effect will last over time, as the colour and flu-orescence are embedded in the depth of the material and will not wear off or dis-appear through intraoral adjustments.

Shading element concentrations are fine-tuned throughout the disc to achieve shade matching gradients. Submicron zirconia crystals carry the shading and fluorescence additives.

Eight different shades of 3M™ Lava™ Esthetic Fluorescent Full-Contour Zirconia with an integrated fluorescent effect that is adjusted to each tooth shade.

ContactDr. Michael JahnsR&D Specialist Crown and Bridge [email protected]

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Bleach A1 A2 A3 A3.5 B1 C1 D2

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© 3M 2017. All rights reserved.

3M Oral CareESPE Platz82229 Seefeld · [email protected]

Editorial Information

Calendar of Events 2017

Please note that not all products are available in all countries. Product name and package may vary from country to country. For more information, please contact your local 3M Representative.

Editor:Frédéric van Vliet

Editorial team:Armin BockBarbara CernySigrid HaderAshley HaslundNaveen KumarKaren Sullivan Albert WaningShira Zary

Project management:Olivia Besten

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Production:Eberl Print GmbH · www.eberl.de

We accept no liability for unsolicited manuscripts or photographs.Court of Jurisdiction: Munich

Published by:3M Deutschland GmbHESPE Platz82229 Seefeld · [email protected]

Date Event Location Website

April 13 – 15, 2017

Imagina Dental 2017

Monaco Monaco Mediax www.imaginadental.org

April 17 – 20, 2017

Dental Salon Moscow

Moscow Dental Expo Ltd. www.dentalexpo.com

April 20 – 22, 2017

10th EAPD Interim Seminar

Torino EAPD www.eapd.eu

May 11 – 13, 2017

Forum Dental 2017

Barcelona Fira de Barcelona www.forum-dental.es

May 12 – 13, 2017

WID – Wiener Internationale Dentalausstellung 2017

Vienna Österreichischer Dentalverband http://wid.dental

May 18 – 20, 2017

Expodental Meeting

Rimini PROMUNIDI Srl http://www.unidi.it

May 25 – 27, 2017

EAED 31st Spring Meeting

Milan European Academy of Esthetic Dentistry http://milan.eaed.org

June 2 – 4, 2017

SIDEX 2017 Seoul Seoul Dental Association http://sidex.or.kr

June 8 – 10, 2017

ICOI European Congress

Cracow International Congress of Oral Implantologists http://icoi.org/meetings-and-symposia

August 17 – 19, 2017

ICOI World Congress XXXV

Vancouver International Congress of Oral Implantologists http://icoi.org/meetings-and-symposia

August 29 – September 1, 2017

FDI 2017 – Annual World Dental Congress

Madrid FDI World Dental Federation http://www.fdi2017madrid.org

September 14 – 16, 2017

IFED 2017 Toyama International Federation of Esthetic Dentistry http://ifed-2017.com

September 14 – 16, 2017

CEDE 2017 Poznan exactus https://cede.pl/2017/en

September 21 – 23, 2017

48th Meeting of the CED-IADR

Vienna International Association for Dental Research http://ced-iadr.eu/website-content/events

October 4 – 7, 2017

26th IAPD Congress

Santiago de Chile

International Association of Paediatric Dentistry http://iapdchile2017.cl