Apr 9 Biomaterials in Dentristry by 6983Shf6

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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




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                                              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.
    11/29/2011                                                   remove excess.                                       19
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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