Apr 9 Biomaterials in Dentristry

8/12/2019 Apr 9 Biomaterials in Dentristry

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Applications in Dentristry


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ADHESIVE DENTISTRY

Indications

Replace carious and fractured toothstructure.

Fill erosion or abrasion defects in cervicalareas.

Correct unaesthetic shapes, positions,

dimensions, or shades. Bond silver amalgam restorations.

Cement crowns.


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Indications-continued

Bond orthodontic brackets.

Treat dentinal hypersensitivity.

Repair fractured porcelain, amalgam, andresin restorations.

Pit and fissure sealants.

Core build up foundations.


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Sealants2. Apply sealant

1. Etch enamel

Courtesy of 3M Dental

Products

3. Light cure


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Glass-ionomers

Most commonly referred to as glass ionomer cements

(GIC's).

These are materials which consist of an aqueouspolyacrylate and a fluoroaluminosilicate glass.

These set by an acid-base reaction in the presence of

water.

These cements appear to adhere to tooth structure by

formation of ionic bonds as a result of chelation of the

carboxyl groups in the acid with the calcium and/or

phosphate ions in the apatite of enamel and dentin.


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COMPOSITION

POWDER = CALCIUM

FLUOROALUMINOSILICATE GLASS

Silicon 13.3% Phosphorus 2.5%

Aluminum 13.3% Fluoride 22.7%

Calcium 17.3% Oxygen 28.0%

Sodium 1.6%

LIQUID = POLYACRYLIC ACID OR COPOLYMER OF ACRYLIC ACID

WATER


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Composites


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Most Common Dental Resin

triethylene glycol dimethacrylate

bisphenol A glycol dimethacrylate


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Fractured incisors

http://www.seattle-

dentist.com/chipped-

teeth.htm


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LINKMAX A3

Cartridge

LINKMAX Clear

Cartridge

Dispensing Dish

Mixing Pad

Self-Etching Primer

EP-A

Self-Etching Primer

EP-B

50 Yellow & 50 Pink

Micro-Tips

Ceramic Primer

Metal Primer II

Package

Micro-Tip HandleMixing Spatula

Packaging

LINKMAX


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Paste Pak Dispenser

Produces Ideal Consistency Every Time.

Dispenses The Exact Mixing Ratio No Matter How Little Or

How Much Material Dispensed.

Metering Slide Enables The User To Control The Volume OfMaterial Dispensed To Reduce Waste.

Less

More


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Dual Cure: Light Cure & Self Cure

Temporary Light-Cured Linkmax Removes Easily With HandInstrument One Minute After Seating.

No Radical Clean-Up Procedure Should Be Required.

Light-Cure Each Surface Of Restoration 20 Seconds.

When Used Under Metal Or When Cement is Difficult To ExposeTo Light, Linkmax Self-Cures In 6 Minutes From Placement OfProsthesis.


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BONDING MICRO-FILLED HYBRID RESIN

Apply thin layer to

prosthesis with micro-

tip.

Light-cure for 20 seconds

Using a VLC Curing Light.

Shake the Self-Etching Primer bottles, then dispense one

drop each into dispensing dish and mix for 5 seconds.

Apply to tooth surface.

Dispense LINKMAX and

mix for 10 seconds.

Apply LINKMAX to primed

porcelain surface.

Hold for 1 minute. Light-

cure for 1-2 seconds; thenremove excess.

Light-cure each surface for

20 seconds.


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Composite Primer

LINKMAX

Self-Etching Primer

MFR Hybrid

Resin Inlay

LINKMAX

Self-Etching

Primer

Composite Primer

NOTE:When bonding MFR hybrid resin

(with main ingredients of organic fillers)from another manufacturer, apply

CERAMIC PRIMER to the prosthesis

instead of COMPOSITE PRIMER.

BONDING MICRO-FILLED HYBRID RESIN


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Apply etchant, after 30 seconds, rinse

with water and dry.

Dispense one drop each Ceramic Primer

into dispensing dish and mix for 5 seconds.Apply to bonding surface and dry.

Shake the Self-Etching Primer bottles,

then dispense one drop each intodispensing dish and mix for 5 seconds.

Apply to tooth surface.

Dispense LINKMAX and

mix for 10 seconds.

Apply LINKMAX to primed

porcelain surface.

Hold for 1 minute. Light-

cure for 1-2 seconds; then

remove excess.

Light-cure each surface

for 20 seconds.

BONDING PORCELAIN


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Ceramic Primer

Ceramic Primer

LINKMAX

LINKMAX

Etchant

Porcelain

Veneer

Self-EtchingPrimer

Porcelain Inlay

Self-Etching

Primer

Etchant

LINKMAX LINKMAXSelf-Etching Primer Self-Etching Primer

Ceramic Primer Ceramic Primer

Etchant Etchant

BONDING PORCELAIN


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Metal

Crown

Metal

Primer II

LINKMAX

Self-

Etching

Primer

BONDING METAL PROSTHESIS TO TOOTH STRUCTURE


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The future

Adhesivedentistry Improving the properties of adhesive materials. e.g. wear

resistance, strength

Biocompatiblematerials Antibacterial, bioactive, drug delivery

Increasing use of implants Shorter healing periods

Poorer quality bone

Less bone

Growing naturalteeth

Documents

Apr 9 Biomaterials in Dentristry