mininmal intervention dentistry

MINIMAL INTERVENTION DENTISTRY

“Life and health are God’s precious gifts to be treasured, nurtured and protected”.

Macro-dentistry‘Extension for prevention’

Micro dentistry‘Prevention of extension’

Terminology"minimal"

• very small in amount or extent; • smallest possible in amount or least possible in

extent; "intervention"

• an action undertaken in order to change what is happening or might happen in another’s affairs,especially in order to prevent something undesirable.

Minimal intervention (MI) in dentistryMount GJ.

Minim Interv Dent 2011; 4 (6)

DEFINITION

“philosophy of professional care concerned with the first occurrence, earliest detection, and earliest possible cure of disease on micro (molecular) levels, followed by minimally-invasive and patient-friendly treatment to repair irreversible damage caused by such disease”

Tyas MJ, Anusavice KJ, Frencken JE, Mount GJ. Minimal intervention dentistry --a review.

Int Dent J 2000 Feb; 50(1): 1-12.

Paradigm Shift

Dental caries as an infectious disease model involves focusing on treatment of the entire disease process not just surgically treating

cavities.

• ‘Drilling and filling’ a tooth is not the only solution to the damage caused by the caries process and is not an effective method to treat the Cariogenic infection.

• A comprehensive preventive and treatment program is necessary to manage dental caries.

• Minimal intervention is modern approach for management of caries

Minimally invasive dentistryCAROL ANNE MURDOCH-KINCH

JADA, Vol. 134, January 2003

CORE PRINCIPLES OF MID

Recognitionidentify and assess any potential

caries risk factors

eliminate or minimize caries risk factors, through altering DIET & increase pH of oral enviorment

To arrest and reverse incipient lesions, regenerating enamel subsurface lesions

Bioactive materials are used to restore the tooth and promote internal healing of the dentine

. Minimum intervention dentistry principles

and objectives.Walsh LJ, Brostek AM.

Aust.dent.jrnl 2013 Jun;58 Suppl 1:3-16

http://www.ncbi.nlm.nih.gov/pubmed?term=Walsh%20LJ%5BAuthor%5D&cauthor=true&cauthor_uid=23721333

http://www.ncbi.nlm.nih.gov/pubmed?term=Brostek%20AM%5BAuthor%5D&cauthor=true&cauthor_uid=23721333

http://www.ncbi.nlm.nih.gov/pubmed?term=Brostek%20AM%5BAuthor%5D&cauthor=true&cauthor_uid=23721333

Patient Centred Management Cycle On Which MITP Is Based

MITP-PRACTICAL IMPLEMENTATION IN GENERAL PRACTICEMinim Interv Dent 2011; 4 (6)

IDENTIFY


PREVENT


RESTORE


A SYSTEM FOR TOTAL ENVIRONMENTAL MANAGEMENT

(STEM) OF THE ORAL CAVITY

Aspects Of The Oral Environment

A SYSTEM FOR TOTAL ENVIRONMENTAL MANAGEMENT(STEM) OF THE ORAL CAVITY, AND ITS APPLICATION TODENTAL CARIES CONTROL Laurence J Walsh

INTERNATIONAL DENTISTRY SA VOL. 10, NO. 1

Simplified scheme of how medical and lifestyle factors caninfluence resting salivary parameters.

A SYSTEM FOR TOTAL ENVIRONMENTAL MANAGEMENT(STEM) OF THE ORAL CAVITY, AND ITS APPLICATION TO DENTAL CARIES CONTROL Laurence J Walsh


A SYSTEM FOR TOTAL ENVIRONMENTAL MANAGEMENT(STEM) OF THE ORAL CAVITY, AND ITS APPLICATION TODENTAL CARIES CONTROL Laurence J Walsh


CONCEPTS OF MID

The focus is on maximum conservation of demineralized, noncavitated enamel and

dentin.

‘Golden triangle’ of MID

The histology of the dental substrate being treated

The chemistry/handling of the adhesive materials used

to restore the cavity

Consideration of the practical operative techniques available

to excavate caries minimally

Minimal intervention dentistry: part 7. Minimally invasive operative caries management: rationale and techniques

A. Banerjee

1) Early Caries Diagnosis2) The Assessment Of Individual Caries Risk

(high, moderate, low)3) The Classification Of Caries Depth And

Progression Using Radiographs4) The Reduction Of Cariogenic Bacteria To

Decrease The Risk Of Further Demineralization And Cavitation

5) The Arresting Of Active Lesion

6) The Remineralization And Monitoring Of Non Cavitated Arrested Lesions

7) The Placement Of Restorations In Teeth With Cavitated Lesions using Minimal Cavity Designs.

8) The Repair Rather Then The Replacement Of Defective Restorations

9) Assessing Disease Management Outcomes At Pre-established Levels.

EARLY DIAGNOSIS OF DENTAL CARIES

• G.V.Black – “ a sharp explorer should be used with some pressure & if a very slight pull is required to remove it i.e. ‘CATCH POINT’, the pit should be marked for restoration even if there are no signs of decay” .

CLINICAL EXAMINATION

• BASCD & WHO: “ if in the opinion of the examiner after visual

inspection a doubt exists, the surface should be investigated with a blunt probe & unless the point enters the lesion ,the surface will be regarded as sound. The blunt probe should have a tip of 0.5 mm”

Clinicians are forced to measure a dynamic process as a dichotomous variable of presence or absence of disease, using

i. Clinical criteria (e.g. color, softness or resistance to removal)

ii. Tools (Sharp explorer)

Healthy occlusal fissure

“ SHARP EYES BUT BLUNT PROBE”

The enamel is damaged by forceful probing with sharp sickle probes, so probes used to examine occlusal surfaces should beblunt and the probing forces light

Unaided caries diagnosisLess then 50% of caries incidences are correctly diagnosed!- occlusal caries = 41% diagnosed- approximal caries = 21% diagnosed

Caries diagnostic with magnification- occlusal caries = 53% diagnosed- approximal caries = 31% diagnosed

Disadvantages

• Still not all carious lesions are identified • Additional aids (Bitewing etc) needed • Costs • poor fit and adjustment - eye strain

• No longer consider to be an appropriate means of diagnosing occlusal caries because of the

i. possibility of extending the lesion or ii. inoculation of additional sites with cariogenic

microbes

Radiographic Assessment

• Minimal depth-500 micro meters• 2D image• Faulty angulation• Ionizing radiation

Caries Detecting Dyes

• Dyes for detection of enamel caries: Procion dye Calcein dye Fluorescent dye Brilliant blue• Dyes for detection of dentinal caries: Basic fuchsin Acid red Carbolan green Comassie blue Lissamin blue

DISADANTAGES:

Does not stain bacteria Risk of over treatment few are carcinogenic some may cause irreversible staining

Recent diagnostic methods

• Electrical Conductance Measurement (ECM)• Quantitative Light Induced Fluorescence (QLF)• Dye Enhanced Laser Fluorescence (DELF)• Diagnodent • Fibre optic Trans Illumination (FOTI)• Direct Magnification (DIMA)• Digital Subtraction Radiography• Optical Coherence Tomography (OCT)• Tuned Aperture Computed Tomography (TACT)• Electrical Impedence Tomography (EIT)• Digital Radiology (DR)

DIFOTI

Electronic Caries Monitor

DIAGNOdent

Diagnodent - dental caries laser detector - Minh Nguyen, D.D.S. - YouTube.flv

Laser detectorExplorer

ULTRASONOGRAPHY

ENDOSCOPE• Fluorescence• Blue light

• White light endoscopy• Small carious lesion• Camera + endoscope = VIDEOSCOPE

CARIES RISK ASSESSMENT

According To “AAPD”

The Caries Balance

Pathological Factors Acid-producing bacteria• Sub-normal saliva flow and/or function Frequent eating/drinking of fermentable carbohydrate

Protective Factors Saliva flow and components Fluoride: remineralizationAntibacterials: - chlorhexidine, iodine?, xylitol, new?Ph controling rinses

Caries No Caries

Featherstone JD 2000

Cariogram is a new way in which to illustrate the interaction between caries related factors

CARIOGRAM - THE FIVE SECTORS

AIMS • Illustrates the interaction of caries related factors. • Illustrates the chance to avoid caries. • Expresses caries risk graphically. • Recommends targeted preventive actions. • Can be used in the clinic. • Can be used as an educational programme.

CARIES MANAGEMENT BY RISK ASSESSMENT (CAMBRA)

2002 FDI BASIC CAMBRA PRINCIPLES• Modification of the oral flora to favor health.• Patient education and informed participation.• Remineralization of non-cavitated lesions of

enamel and dentin/cementum• Minimal operative intervention of cavitated

lesions and defective restorations.• Repair of defective restorations

1. Modification of the oral flora

Dental caries is an infectious disease, and the primary focus should therefore be on-

i. control of the infection,ii. plaque control and iii. reduced carbohydrate intake.

2. Patient education

The etiology of dental caries should be explained to the patient, together with the means of prevention through dietary and oral hygiene measures.

3. Remineralization of non-cavitated lesions of enamel and dentine

• Saliva plays a critical role in the demineralization/remineralization cycle, and its quantity and quality should therefore be assessed.

• There is strong evidence that ‘white spot’ lesions of enamel and non-cavitated lesions of dentine can be arrested or reversed.

• Such lesions should therefore be managed initially by remineralization techniques.

• The extent of the lesion should be objectively recorded such that any progression can be identified at recall.

4. Minimal operative intervention of cavitated lesions

Operative intervention should focus on the preservation of natural tooth structure and be limited to the removal of friable enamel and infected dentine.

This can be done with hand, rotary, sonic, ultrasonic, air abrasive or laser instruments, depending on the circumstances.

Preparation of minimal cavities enables their restoration with adhesive materials such as glass-ionomer cement and/or resin composite.

5. Repair of defective restorations

Removal of restorations results in an inevitable increase in cavity size as a consequence of removal of sound tooth structure.

Depending on the clinical judgment of the dentist, repair could be considered as an alternative to replacement in some circumstances.

• LANIMA-lesions for which appropriate non-invasive management is advised.

• LOCA-lesions for which operative care is advised

• Five treatment categories for the protocol:1. Caries-Balanced Low-Risk2. Caries-Balanced Moderate-Risk3. Caries-Active Moderate-Risk4. Caries-Active High-Risk5. Caries-Active Extreme-Risk

NEW CARIES CLASSIFICATION

MOUNT AND HUME CLASSIFICATION

SITE 1

SITE 2

SITE 3

4.REMINERALIZATION OF EARLY LESIONSAND REDUCTION OF CARIOGENIC BACTERIA

• Enamel and dentin demineralization is not a continuous, irreversible process.

• Through a series of demineralization and remineralization cycles, the tooth alternately loses and gains calcium and phosphate ions, depending on the microenvironment



When the pH is less than 5.5, subsurface enamel or dentin will demineralize.

Fluoride enhances the uptake of calcium and phosphate ions and can form fluoroapatite.

Fluorapatite demineralizes at a pH less than 4.5, making it more resistant to demineralization from an acid challenge than hydroxylapatite.

In early carious lesions, there is subsurface demineralization of the enamel.

As caries progresses into dentin, the surface of the enamel eventually cavitates.



surgical treatment— caries removal and restoration—is indicated for the cavitated lesion

In the noncavitated lesion, to take advantage of the tooth’s capacity to remineralize, one must first alter the oral environment, to tip the balance in favor of remineralization and away from demineralization.



This is achieved by:1. Rebalancing the oral environment2. Approach to remineralization3. Surface protection• Changing the microflora, using agents such as topical

chlorhexidine and topical F• Reducing the amount of dietary sucrose• Decreasing the intake of fermentable carbohydrates• Adding fluoride, particularly through daily application

during tooth brushing• Increasing salivary flow, using mechanical stimulation

during vigorous chewing to enhance flow, by changing drugs which reduce flow, or by using drugs to enhance flow.

• Fissure protection by use of sealants.

Rebalancing the Oral Environment

i. Use a chlorhexidine mouthwash twice a day, ii. Limit intake of fermentable carbohydrates, iii. Ensure an optimum salivary flow,iv. Use buffering agents to control oral ph, v. And practice good oral hygiene to prevent plaque

accumulation.

The goal is to change the local biochemistry so that the patient is no longer losing tooth mineral and further cavitation does not occur

Approach to Remineralization

Fluoride is widely known molecule that enhanceremineralization.

It is used in various forms, topical application ofgel/foam, mouthwash, varnish, in toothpastes.

Fluoride combines with hydroxyapatite to formfluorapatite layer that is resistant to dissolution inacid produced bymicroorganisms.

Non-Fluoride Remineralizing Agents

CPP-ACP complex

Demineralized EnamelRemineralized enamel using fluoride and CPP-ACP

Body of lesion remineralized with CPPACP

NovaMin® (calcium sodium phosphosilicate)

is a bioactive glass composed of minerals that naturally occur in the body and reacts when it comes into contact with water, saliva or other body fluids.

This reaction releases calcium, phosphorus, sodium and silicon ions in a way that results in the formation of new hydroxycarbonate apatite (HCA) crystals.

NovaMin forms a mineralized layer that is mechanically strong and more resistant to acid

Xylitol containing chewing gums increase salivary flowrate and enhance protective properties of saliva by increasing the buffering activity.

The concentration of bicarbonate and phosphates ions in stimulated saliva is high which help in preventing demineralizationXylitol containing chewing gums increase salivary flow rate and enhance protective properties of saliva by increasing the buffering activity.

The concentration of bicarbonate and phosphates ions in stimulated saliva is high which help in preventing demineralization

7.MINIMAL INTERVENTION TOOTH PREPARATION

Conventional caries removal and cavity preparation entail the use of the burs.

Disadvantages of this system include:(1) The perception by patients that drilling is

unpleasant.(2) Local anesthesia is frequently required.(3) Drilling can cause deleterious thermal effect

combined with the use of pressure for caries removal, causing pulpal effects.

(4) The use of a hand piece may result in removal ofsoftened, but affected dentine, resulting in an

excessive loss of sound tooth tissue.

An Introduction To MinimalIntervention Dentistry (MI)

S Mickenautsch

DENTAL NEWS, VOLUME XIV, NUMBER IV, 2007

1.MECHANICAL ROTARYi. BURS

2.MECHANICAL,NON ROTARYii. AIR ABRASIONiii. AIR POLISHING

iv. ATRAUMATIC RESTORATIVE TECHNIQUEv. ULTRASONICS

vi. SONIC ABRASION3.CHEMO-MECHANICAL

vii. CARISOLV,CARIDEXviii. ENZYMES

4.PHOTOABLATIONix. LASER

MECHANICAL ROTARY BURS

The Fissurotomy® Bur1. It can be used to progressively explore suspect fissure

systems or portions of fissure systems.

2. The bur can be used to create one pass cutting to theDEJ, when its depth is accurately judged by knowingthe bur head length (2.5 mm) and gauging depth byrelating the bur head/neck junction to the cavosurfacecavity preparation margin.

3. The bur can be used to remove very small amounts of carious dentin..

• The bur can be used to gain access to larger dentin carious lesions by efficiently removing overlying enamel

• Finally, the bur can be used for enameloplasty procedures to remove irregular surface and fissurerelated defects, and to prepare an area for restoration or sealing.

The goals of ultraconservative preparation are quite simple:

1. Recontouring the fissure and pit anatomy for access and visibility.

2. Exploration of the cavity to ensure that no decay remains undetected.

3. Ultraconservative (but complete) caries removal.

Variations In Dealing With AProximal Lesion

Smart Polymer Burs !!!

Dream or Reality ?

SMART PREP KIT

KNOOP HARDNESS NUMBER

ATRAUMATIC RESTORATIVE

TREATMENT

“No Needle, No Drill,

No Noise”

The correct use of the ART approachJo E. FRENCKEN1, Soraya Coelho LEAL

J Appl Oral Sci. 2010;18(1):1-4

DEFINITION

• Elementary technique of caries removal using hand instruments only ,combined with the use of modern restorative material with adhesive characteristics

PioneersFrencken Joe, Makoni F. in Tanzania 1980

PRINCIPLE

• Removal of cariogenic biomass

• Seal & protect tooth

• Place an adhesive restorative material

ART Indications

• Limited access to traditional care• Pediatric & Geriatric care• High caries risk management• Extreme dental fear/anxiety

management

ADVANTAGES OF ART• Easy Caries Removal • Conserve tooth structure• Hand Instruments• Limitation of Pain, Non threatening• Restore with an adhesive material• No local anesthesia• No high/low speed hand piece• No suction• No water• Simple infection control• Prevent secondary caries(Fluoride)• Ease of repair• Low cost

Procedure• Isolate• Access• Excavate• Condition• Insert• Press• Remove excess

….Instruct patient not to eat for at least an hour

Atraumatic restorative treatment (ART)

The most common failures are:-

Partial material lossComplete material lossCaries related to restoration marginMaterial wear >0.5 mm

Atraumatic restorative treatment (ART) – factors affecting successMickenautsch S and Grossman E S

Journal Of Minimum Intervention In Dentistry2008; 1 (2)

ART failures may occur in combination or lead to each other.

• Hand excavation, as a mechanical form of selective caries removal, is capable to remove most of the infected dentin.

• However, research showed that bacteria remain present after complete hand excavation within the tubuli of affected dentine

Bönecker M, Grossman E, Cleaton-Jones PE, Parak R. Clinical, histological and microbiological study of hand-excavated carious dentine in

extracted permanent teeth. South Afric Dent J 2003; 58: 273-8.

Caries activity can be reduced through- effective nutrient deprivation by sealing the

cavity using filling materials which chemically bond to the cavity walls

assist remineralisation of affected dentine through long-time fluoride and mineral release

Weerheijm KL, Groen HJ. The residual caries dilemma.

Community Dent Oral Epidemiol 1999; 27: 436-41

• Clinical factors responsible for ART failures are

1. Material Factor 2. Operator Factor

3. Technique Factor


Journal Of Minimum Intervention In Dentistry


Journal Of Minimum Intervention In Dentistry

WHAT IS UNDERSTOOD BY‘MODIFIED ART’?

• Modification is most often associated with theuse of rotary equipment: the drill, to open thetooth cavity, followed by the normal ARTprocedure in cleaning and restoring the cavity

• It has been suggested that the use of rotaryequipment would make the total procedurequicker and easier.

The correct use of the ART approachJo E. FRENCKEN1, Soraya Coelho LEAL

CHEMO MECHANICAL CARIES REMOVAL (CMCR)

Chemical softening of carious dentin followed by its removal by gentle excavation

• Softened the outer dentin• Solution 1: NaOCl• Solution 2: glycine+amino butyric acid+ NaCl+NaOH• pH = 11

CARIDEX

Chemomechanical caries removal (CMCR) agents:Review and clinical application in primary teeth

M. Ganesh and Dhaval Parikh

MediTeam – Sweden-1998

carisolvChemomechanical caries removal (CMCR) agents:Review and clinical application in primary teeth


2 Syringes

NaOCl

Pink Viscous gel ( Lysine, Leucine, Glutamic Acid +Carboxymethyl cellulose + Erythrosine )

Time Required – 10 – 15 mins

Max Volume of Gel – 0.2 – 1 ml

Cloudy - frosty

‘A silent revolution’

Procedure







ADVANTAGES• Painless• No need of local anesthesia• Conservation of sound tooth structure• Reduced risk of pulp exposure• Well suited for anxious patient

LIMITATION

• Rotary and hand instruments may still be needed



ENZYMES

Enzymes for removal of caries !!!!!! • Achromobacter collagenase- In 1989 Goldsberg and

Keil• Enzyme Pronase –non specific proteolytic enzyme –

Streptomyces griseus

• Pepsin- carboxylic protease enzyme ,acts only on non-helical and denatured collagen segments.

PAPACARIE

MAIN COMPONENTS –•PAPAIN- Enzyme•CHLORAMINE- Bactericidal and disinfectant•TOLUIDINE BLUE- Coloring agent


M. Ganesh and Dhaval ParikhJournal of Dentistry and Oral Hygiene Vol. 3(3)34-45, 2011

MODE OF ACTION



AIR ABRASION (Kinetic Cavity Preparation)

• Air abrasion utilizes kinetic energy from alumina particles entrained in high velocity stream of air to remove tooth structure

Kavo Rondo Flex

KCP 100

Prep Start

Comparison between drill and air abrasion

High Speed Drills Air Abrasion

Rotary bur cause micro fractures No micro fractures

Excessive destruction of tooth structure

Less destruction of tooth structure

Heat,vibration,bone conducted noise-patient discomfort

Heatless,vibrasion less, minimal sound

Patient Anxiety Patient friendly

Abrasive particles

• Aluminum oxide• Alumina particles – alpha alumina, pure,

biocompatible, used in food and medicine, prime ingredient in tooth paste

• Particle size – 27 micro meter• Polycarbonate resin alumina- hydroxyapatite

mixtures-selective in removal of caries• Sodium bicarbonate-remove surface stains ,plaque

Dental Air Abrasion - YouTube.flv

Applications of Air Abrasion

• Cavity preparations• Removal of temporary cement• Micro abrasion of white spot enamel

hypoplasia• Stains removal• Repair of acrylic ,composite, porcelain

Air abrasion cannot be used for …

• Crown preparation• Large-deep carious defects• Amalgam removal• Class II Cavity preparations

ADVANTAGES

• Non traumatic treatment• Biocompatibility• No Chipping• No micro fracturing• Decreased thermal build up• smooth margins• Less invasive procedure• No anesthesia• Less discomfort

DISADVANTAGES

• Lack of tactile sensation• Non contact based modality• Messy –Spread of aluminium oxide• Danger of air embolism and emphysema• Impaired indirect view

Contraindications

• Asthma patients• Severe dust allergy• Chronic pulmonary disease• Recent extraction• Open wound in oral cavity• Sub gingival caries removal

Safety Issues

• Masks• Rubber dam• Dry vaccum systems• Eye glasses• Disposable mouth mirror• High speed suction

OZONE THERAPY

THE MOST BEAUTIFUL THINGS ON EARTH ARE ALSO THE MOST SIMPLEST AND MOST NATURAL !!!!!

OZONE

NATURE’S MOST POWERFUL OXIDANT

CARIOUS LESIONS NOT ONLY BECOME STERILE AFTER EXPOSURE TO OZONE BUT ALSO TEND TO RE-MINERALIZE AFTER SOMETIME

Kills bacteria,spores and viruses….

ozone to the rescue ….• completely eliminates acidophilic

bacteria ,fungi and viruses • Sterile environment • 10 secs of 2200 ppm ozone

eliminates 99 % of the carious micro flora

• Niche is very unlikely to re-develop

Effects of ozone

• kills microbes

• Plaque• Little influence on alloys

Ozone A powerful biocide

Heal ozone Tec3 ( Curosone, USA)

POLYURETHANE CONSOLE HAND PIECE PATIENT KIT

•Ozone Generator•Vacuums pump •Flow sensors •Peristaltic pump• Desiccant •Ozone destructor•Back-lit LCD Display

•Hand piece•Disposable sealing cup•Push button

•Re-Mineralizing tooth paste•Oral rinse•Travel spray

Clinical steps Polymer Cup is adapted to carious lesion and air is sucked to create a vacuum

Ozone gas is delivered at a preset conc. ,for 10 secs if the seal is good

If the seal is defective the unit switches off

Suction activated for 10 secs to remove debris from the surface

Suction system passes gas through Granular activated carbon filter to remove all traces of ozone

Reductant fluid is pumped for 5 secs onto treatment site to start the remineralization process

Patient is instructed to use ‘home care kit’ and recalled after 3 months for check up ,when a cosmetic restoration can be placed if needed

OZONE THERAPY

Indications for Ozone Therapy

• Primary root carious lesions• Early carious lesions• Pit and Fissure caries• Caries around crowns and bridges

Advantages• Kills 99%micro organisms• Oxidizes caries and speeds up re-

mineralization• Removes organic debris on carious lesions• Removes volatile sulphur which cause halitosis• Decrease treatment time• Microbes don’t become resistant• Non –allergic, noiseless, painless and Phobic

friendly and pedo friendly

BIDDING A FINAL FAREWELL TO OUR DRILL,

FILL AND BILL PHILOSOPHY !!!!

LASER THERAPY

Efficacy of laser depends on •Wavelength characteristics•Pulse energy•Optical properties of incident tissue

Applications•Selective Hard Tissue Ablation•Selective Carious Dentin Removal•Destroy S.Mutans•Sealing of Fissures•Cut Dental Hard Tissue•Adjunctive treatment in caries prophylaxis•Modify structures of dentin and enamel

Lasers used for selective hard tissue ablation•Er:YAG :Yttrium –Aluminium-Garnet and Nd:YAG – Neodymium-YAG-IR Emission•C02 Laser – IR Emission•Excimer Lasers (ArF- Argon: Freon and XeCl – Xenon : Chlorine – U.V.Emission•Holomium lasers•Dye enhanced laser ablation – Indocyanine Green & Diode Laser

Carious Dentin Removal – UV Excimer (377nm)Destroy S.Mutans – Excimer with Dye

Sealing of fissures – CO2

Laser Caries Removal Technique - YouTube_2.flv

Advantages

• Effect of vibrations,pressure and unfavorable temperatures associated with rotary cutting instruments –avoided

• Safe and efficacious modality of caries removal and cavity preparation

Limitations•Expensive•Size of the instrument

POINTS TO REMEMBER…

• GENTLY TOUCH TARGET TISSUE • CUTTING RADIATION ONLY FROM THE END OF

TIP• WATER STREAM TO TARGET TISSUE• OPERATION AREA SHOULD BE WET• KEEP TIP MOVING• WIDE CUT- TIP OVER THE SURFACE• DEEP CUT- TIP UP & DOWN

Laser safety

SONIC OSCILLATION (SONOABRASION)

SONO ABRASION• Removal of carious dentin using high

frequency ,sonic air scaler with modified abrasive tips

First Design

•Sonic micro unit deigned by Dr.Hugo Unterbrink and Mosele•Based on Soniflex Air scaler Hand piece •Oscillations - < 6.5 KHZ

Mechanics

Elliptical motion Transverse 0.08 - 0.15mm Longitudinal - 0.055 -0.135mm

Diamond Coated – 40 micro meter grit Water irrigation 20-30ml/minAir pressure 3.5 bar

• Torque Applied – 2N • More pressure - dampens oscillations

Indications

•Carious dentin removal•Finishing cavity preparations

More studies needed to prove its efficiency

Principals of Minimally Invasive Restoration1. Shape of cavity is dictated by the caries and unique

foreach carious lesion (conservative cavity preparation).2. Only demineralized enamel and infected dentine isremoved, affected dentine can be left.3. Macromechanical retention not required.4. Undermined enamel cavity can be restored with

adhesive materials.

BIOMIMETIC MATERIALS

CPP-ACP

• Casein phosphopeptide- amorphous calcium phosphate

releases Ca and Phosphate ions

GC tooth mousse,ACP composite

• Remineralization effect of 0.5 - 1.0% CPP-ACP solution, equivalent to 500 ppm of Fluoride

• GC TOOTH MOUSSE

• flavor helps stimulate salivary flow

ARISTON pHc • Introduced by ivoclar-vivadent in 1998• Light activated alkaline –glass restorative material• Intelligent restorative material as it releases

calcium,flouride and hydroxyl ions when intraoral pH values dropes below critical 5.5 level

• Restoration of class I and II lesions.

BIODENTINE

• Bio-active dentin substitute• All-in-one, biocompatible, bulk filling material.• Ca3SiO5 based cement• A supra plasticizing admixture to reduce the water

content to the mix and retain its workability.• Improved handling properties.• Setting time - 10 min.• Helps in re-mineralization of dentin.

8.REPAIR VS. REPLACEMENT OF DEFECTIVE RESTORATIONS

caries under well-sealed restorations fails toprogress and that caries progresses slowly Inmost populations, repairing defective

restorations rather than replacing them is a valid and more conservative option for treatment



PEDIATRIC MINIMAL INTERVENTION DENTISTRY

Caries Management Protocol for 1-2 Year Olds

Caries Management Protocol for 3-5 Year Olds

Caries Management Protocol for ≥6 Year-Olds

GERIATRIC MINIMAL INTERVENTION DENTISTRY

COMPLEXRESTORATIVE CHALLENGES IN OLDER

PATIENTS

• Erosion, • Abrasion,• Demineralization,• Rampant coronal and root caries, • Sound and decayed retained roots, • Recurrent caries (necessitating crowns and other

repairs),• Subgingival caries, • “wet” oral environments

• Salivary gland hypofunction,• Disruptive behaviours, • Poor compliance with preventive care, • High plaque levels,• Bleeding and swollen gingival tissues, and • Financial and• Other restrictions on care options

• The use of a blunt or periodontal probe is advocated for exploring root-surface caries in older adults

TECHNIQUES

• Placement of Glass Ionomers• Sandwich Technique• Remineralization and Restoration to Counteract

Erosion and Abrasion• Tunnel and Slot Preparations• Techniques for “Wet” Subgingival Environments• Vital Pulp Therapy• Geriatric Atraumatic Restorative Technique

Placement of Glass Ionomers

Sandwich Technique

• 2 direct restorative materials can be used to “make the most of the biological, physical and/or aesthetic properties of each material, and in the presence of adhesion, to achieve as close as possible to a single monolithic reconstruction of a tooth.

• useful in situations when strength and pleasing esthetics are essential

• FULL SANDWICH TECHNIQUE

• PARTIAL SANDWICH TECHNIQUE

Remineralization and Restoration to Counteract Erosion and Abrasion

Remineralization involves the use of products such as-

Topical fluorides and Amorphous calcium phosphatesMI Paste (GC America)

Restoration of cervical lesions may beundertaken when esthetics is an issue or when

soft caries and cavitation have occurred. The use of glass ionomers and composite

resins either alone or in combination (with a sandwich technique) is generally recommended

Tunnel and Slot Preparations

• Slot preparations are indicated for lesions that are less than 2.5 mm from the marginal ridge.

• The lesion is more than 2.5 mm from the marginal ridge, a tunnel preparation can be used.

Techniques for “Wet” Subgingival Environments

In many older patients it can be extremely challenging to control bleeding and saliva during restoration of subgingival carious lesions, which tend to recur around large restorations and crowns.

A glass ionomer such as Fuji Triage works well in these “wet” environments because it has low viscosity and does not “run”

Caries Classification And Treatment Options For Geriatric Minimal Intervention Dentistry

STRATEGIES FOR ADDRESSING THE NEW CARIESCHALLENGE IN OLDER PATIENTS

• For older patients, the practitioner may need to assess modifying factors such as those

i. Social support,ii. Transportationiii. Fear and anxiety, iv. Consent,v. Restraint andvi. Perceived need

Chemoprophylactics

CATIONIC

• chlorhexidine gluconate (CHX),• cetylpyridinium chloride (CPC), • benzalkonium chloride, • hexetidine and • metal salts;

ANIONIC

• sodium lauryl sulfate;

NONIONIC• Phenolic compounds (essential oils) and

triclosan.

OXYGENATING AGENTS

• hydrogen peroxide and • surface-modifying agents(e.g., delmopinol).

Treatment of xerostomia and salivary gland hypofunction

General treatment

• Change medications to classes that are less anticholinergic lead to less fluid retention

• Increase water intake (if not contraindicated bymedications and medical conditions).• Avoid dental products with additives (e.g., sodium

lauryl sulfate) or alcohol (e.g., mouthrinses)• Use a room humidifier during the day and at night.

Saliva substitutes and oral lubricants

• Oral Balance Gel,• Denture Grip,• Biotene Range (mouthrinse, toothpaste and gum) • MI Paste (GC America, Alsip, Ill; • Range of other products such as Moi-Stir(Kingswood Laboratories, Indianapolis, Ind.),• MouthKote • XeroLube

Saliva stimulants

• Sugar-free gum and candy several times daily (e.g.,xylitol gum and candy products, • Trident White with Recaldent gum (Cadbury Adams

USA LLC, Parsippany, N.J.)• SalivaSure tablets (Scandanavian Formulas,

Sellersville, Penn.) Place near major salivary ducts several times daily and suck.

• Contains fruit acid which is pH buffered. • Systemic sialogogue therapy with pilocarpine or

cevimeline;

Future of

Minimal Intervention Techniques …

NANOTECHNOLOGY

Richard.P.Feynman

Think twice before you pick up that hand piece ……. ….Because the cutting edge is not a dental bur anymore !!!

CONCLUSION

Thank you…

Types of caries lesions

Cavitated caries lesions

Non-cavitated caries lesions

Causes structural alteration of the surface of the tooth enamel, without loss of macroscopic

substance and

led to structural alterations to such a

degree that there is loss of dental substance

and the formation of a cavity, whether shallow

or deep

Tooth restoration – Non Invasive TechniquesBasso M

J Minim Interv Dent 2011; 4 (3)

As a rule of thumb, it can be said – cavitated lesions we have no choice but to carry outinvasive restorative procedures, while with non-cavitated surface lesions we caninstead opt for restorative solutions that do notinvolve working with abrasives and hence, do notentail procedures of a locally invasive nature.

Tooth restoration – Non Invasive TechniquesBasso M

J Minim Interv Dent 2011; 4 (3)

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