Apr 9 Biomaterials in Dentristry

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posted:: 11/29/2011
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Applications in Dentristry

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ADHESIVE DENTISTRY
Indications
 Replace carious and fractured tooth
structure.
 Fill erosion or abrasion defects in cervical
areas.
 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, and
resin restorations.
 Pit and fissure sealants.
 Core build up foundations.

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2. Apply sealant
Sealants

1. Etch enamel

3. Light cure

Courtesy of 3M Dental
Products

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Glass-ionomers

• Most commonly referred to as glass ionomer cements
(GIC's).
• These are materials which consist of an aqueous
polyacrylate 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
bisphenol A glycol dimethacrylate

triethylene glycol dimethacrylate
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Fractured incisors

http://www.seattle-
dentist.com/chipped-
teeth.htm
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50 Yellow & 50 Pink
LINKMAX
Self-Etching Primer Self-Etching Primer
EP-A EP-B Micro-Tips Packaging

Mixing Pad

LINKMAX A3
Cartridge

Ceramic Primer LINKMAX Clear
Cartridge

Metal Primer II Dispensing Dish
Package

11/29/2011 Micro-Tip Handle 14
Mixing Spatula
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 Of
Material Dispensed To Reduce Waste.
More

Less

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Dual Cure: Light Cure & Self Cure

• Temporary Light-Cured Linkmax Removes Easily With Hand
Instrument 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 Expose
To Light, Linkmax Self-Cures In 6 Minutes From Placement Of
Prosthesis.

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BONDING MICRO-FILLED HYBRID RESIN

Apply thin layer to Light-cure for 20 seconds Shake the Self-Etching Primer bottles, then dispense one
prosthesis with micro- Using a VLC Curing Light. drop each into dispensing dish and mix for 5 seconds.
tip. Apply to tooth surface.

Dispense LINKMAX and Apply LINKMAX to primed Hold for 1 minute. Light- Light-cure each surface for
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mix for 10 seconds. porcelain surface. cure for 1-2 seconds; then 20 seconds. 17
remove excess.
BONDING MICRO-FILLED HYBRID RESIN
Composite Primer

LINKMAX
Self-Etching Primer
MFR Hybrid
Resin Inlay

Composite Primer

LINKMAX

Self-Etching
NOTE:When bonding MFR hybrid resin
(with main ingredients of organic fillers)
Primer
from another manufacturer, apply
CERAMIC PRIMER to the prosthesis
instead of COMPOSITE PRIMER.

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BONDING PORCELAIN

Apply etchant, after 30 seconds, rinse Dispense one drop each Ceramic Primer Shake the Self-Etching Primer bottles,
with water and dry. into dispensing dish and mix for 5 seconds. then dispense one drop each into
Apply to bonding surface and dry. dispensing dish and mix for 5 seconds.
Apply to tooth surface.

Dispense LINKMAX and Apply LINKMAX to primed Hold for 1 minute. Light- Light-cure each surface
mix for 10 seconds. porcelain surface. cure for 1-2 seconds; then for 20 seconds.
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BONDING PORCELAIN

• Etchant Etchant

•
•
Ceramic Primer
LINKMAX
Ceramic Primer

•
LINKMAX
Self-Etching Primer Self-Etching Primer
Porcelain Inlay
Ceramic Primer
Etchant

LINKMAX Ceramic Primer

LINKMAX
Self-Etching
Primer Self-Etching
Primer
Porcelain
Veneer
Etchant

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BONDING METAL PROSTHESIS TO TOOTH STRUCTURE

Metal Metal
Primer II Crown

LINKMAX

Self-
Etching
Primer

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The future
 Adhesive dentistry
 Improving the properties of adhesive materials. e.g. wear
resistance, strength
 Biocompatible materials
 Antibacterial, bioactive, drug delivery
 Increasing use of implants
 Shorter healing periods
 Poorer quality bone
 Less bone
 Growing natural teeth

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