Basics ppt for e mail part 1 10 mb

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cosmeticdentistry on line course

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Basics ppt for e mail part 1 10 mb

  1. 2. DR RAJESH GADEKAR BDS 1982 GDC NGP PG CERT COSMETIC DENTISTRY USA CERT COSMETIC DENTISTRY SWIS CERT DENTAL IMPLANTS GERMANY CERT FIXED ORTHODONTICS CERT MICRO DENTISTRY CERT PERIO AESTHETIC SURGERY CERT METAL FREE DENTISTRY INTERNATIONAL LECTURES JAPAN, TURKEY, SINGAPORE ,SRILANKA, ISRAEL, ITALY T V INTERVIEWS SURABHI –DD1, SUBAH –SAVERE-DD1, ZEE NEWS MAHARASHTRA STATE NEWS , ETV Private practice As GP since 25 yrs As smile designer since 15yrs
  2. 3. SHRI GANESHJI LORD RAMDEOJI LORD MAHAVIRJI
  3. 6. Invisible trouble free & durable composite restorations
  4. 7. BASICS & LATESTS IN AESTHETIC ADHESIVE DENTISTRY
  5. 12. composites *Require different approach in cutting principles *G V BLACK’S principles not useful *No extenssion for prevention,, extenssion is considered As distruction,,extenssion is ONLY FOR CONVENIENCE *Rounded thick margins or thick BEVELS,,NO KNIFE EDGES *No bulk fillings WHY & HOW
  6. 13. *Attention to technique sensitivity as per manufacurers intructions *Use of un expired materials,,good storage *Strict isolation,prevention from infection *Efficient light cure machines *regular periodic maintenance of restoration & gingival pdl tissues composites
  7. 14. composites *use of round burs & tapered fissure burs with rounded ends * minimum cutting,, minimum dentin cementum exposure *updating knowledge & armamentarium
  8. 15. Composites for Direct Restoration <ul><li>Conventional 8 to 12  m </li></ul><ul><li>Small Particle 1 to 5  m </li></ul><ul><li> Hybrid 0.6 to 1  m </li></ul><ul><li>Microfill 0.04 to 0.4  m </li></ul><ul><li>Micro/Nano-hybrid 0.6  m </li></ul><ul><li>Particle size </li></ul><ul><li>0.04  m to 1  m equivalent to </li></ul><ul><li>40 nanometers </li></ul><ul><li>to 100 nm. </li></ul>
  9. 16. Ideal Composite for Direct Composite Restorations outermost layer <ul><li>Microfills - Less cure time 4 to 10 sec. </li></ul><ul><li>- High luster & Polish </li></ul><ul><li>- Slow wear </li></ul><ul><li>- High Polymerization shrinkage </li></ul><ul><li>- Less strength </li></ul><ul><li>- Lower Flexural strength </li></ul><ul><li>- Stickiness </li></ul><ul><li>- Translucency </li></ul><ul><li>Microfill size - 0.04 to 0.4  m </li></ul><ul><li>- Heliomolar Invoclar -Vivadent </li></ul><ul><li>- Clearfil ST - Kuraray </li></ul><ul><li>- Durafil VS - Heraeus Kulzer </li></ul>
  10. 18. Ceram x nano ceramic Composite with organically modified ceramic particles 2-3 nano meter in size High luster Less curing time Low voids Non sticky Low polymerisarion shrinkage Better cure More durable Reuced fluid absorption Low wear Low maintenance Most economical
  11. 20. Micro/Nano Hybrids - – 0.4 to 0.6  m <ul><li>Clinical Features </li></ul><ul><li>Good polishability & Luster. </li></ul><ul><li>Low polymerization shrinkage due to less resin. </li></ul><ul><li>High strength. </li></ul><ul><li>High Flexibility. </li></ul><ul><li>Virtually Non Sticky </li></ul><ul><li>Good Handling Less Slumping </li></ul><ul><li>Higher radioopacity. </li></ul><ul><li>Less Sensitivity to ambient & Operatory light. </li></ul><ul><li>Less curing time. </li></ul><ul><li>Low wear. </li></ul>
  12. 21. Flowable composites Low filler content Thixotrophic Less sticky Better intemate adaptation to tooth strucure Less voids Can be placed evenly all over cavity in very thin layer Makes shading layering of paste composites very easy Reducing pull back to instrument
  13. 26. Effect of 37 % Phosphoric Acid
  14. 29. Beauty of Bonding & Generation Concept
  15. 30. 1 st Generation Dentin Bonding <ul><li>1965 – Bowen - Glycerophosphoric acid dimethacrylate </li></ul><ul><li>– byfunctional molecule- hydrophilic phosphate </li></ul><ul><li>group- calcium irons of hydroxyapatite. </li></ul><ul><li>Surface active comonomer-NPG-GMA bonding by Chelation </li></ul><ul><li>Bond strength to dentin 3 MPA </li></ul>
  16. 31. 2 nd Generation Dentin Bonding <ul><li>Polymerisable phosphates- Bis- GMA-Cloro substituted </li></ul><ul><li>phoshate esters of various monomers </li></ul><ul><li>Ionic bond to calcium by clorophosphate group </li></ul><ul><li>Drawback- Eventual hydrolysis- Debonding- Long term Success? </li></ul><ul><li>Examples : </li></ul><ul><li>Clearfil (Kuraray)- 2-HEMA and Phenyl Phosphate </li></ul><ul><li>Scotch bond – 3 M- Hallo Phosphorous Ester of Bis- </li></ul><ul><li>GMA </li></ul><ul><li>Bond Strength – 2 to 7 MPA </li></ul>

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