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Tooth Preparation - Aesthetic veneers

Presentation from Prof Paul A. Tipton, for Smile GB, on aesthetic veneers

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Tooth Preparation - Aesthetic veneers

  1. 1. Dr. Paul A. Tipton the art and science of aesthetic dentistry prepare ur1 for conventional veneer
  2. 2. Dr. Paul A. Tipton use a putty matrix of the teeth or wax up , as a guide to tooth preparation.
  3. 3. Dr. Paul A. Tipton cut the matrix vertically through the centre of UR1
  4. 4. Dr. Paul A. Tipton if the tooth is not to be moved labially or palatally the conventional labial preparation involves 0.5mm reduction of the labial surface and 2mm off the incisal edge
  5. 5. Dr. Paul A. Tipton prepare depth cuts using burs of between 0.3 – 0.5mm thick to establish labial reduction and 1 - 2mm for incisal edge reduction.
  6. 6. Dr. Paul A. Tipton the labial surface is prepared in 3 planes – gingival, labial and incisal thirds to produce a convex surface the finish line labially should be a 0.3mm supra-gingival chamfer to stay in enamel using a chamfer bur of 0.6mm thick cutting tip.
  7. 7. Dr. Paul A. Tipton cut the matrix through the middle of the tooth that is being prepared and vertically reseat to evaluate tooth reduction.
  8. 8. Dr. Paul A. Tipton the finish line mesially and distally should finish halfway into the contact area with the adjacent teeth.
  9. 9. Dr. Paul A. Tipton place depth cut on the palatal incisal edge and prepare palatal chamfer 1mm over the incisal edge and 0.5mm depth.
  10. 10. Dr. Paul A. Tipton evaluate labial, incisal and palatal reduction.
  11. 11. Dr. Paul A. Tipton prepare the palatal chamfer through mesially and distally so they are at the same level as the palatal mini-chamfer
  12. 12. Dr. Paul A. Tipton completed palatal chamfer.
  13. 13. Dr. Paul A. Tipton break through the contact areas with finishing strips and polish these surfaces so there are no rough or loose enamel prisms round the corners of the preparation to prevent any stress
  14. 14. Dr. Paul A. Tipton reseat the matrix to verify overall reduction.
  15. 15. Dr. Paul A. Tipton the finished preparation should be very rounded to eliminate potential porcelain fractures.
  16. 16. Dr. Paul A. Tipton the art and science of aesthetic dentistry porcelain veneers preparation techniques conventional no guidance preparation labial enamel
  17. 17. Dr. Paul A. Tipton prepare ur2 for butt joint veneer prep
  18. 18. Dr. Paul A. Tipton the putty matrix is again used.
  19. 19. Dr. Paul A. Tipton the labial surface is reduced by 0.3 – 0.5mm as previously.
  20. 20. Dr. Paul A. Tipton the incisal edge is reduced by 1.5 – 2.0mm.
  21. 21. Dr. Paul A. Tipton the incisal edge is prepared for an angled butt joint. the incisal edge will have a 30° sloping shoulder
  22. 22. Dr. Paul A. Tipton mesially and distally the preparation is halfway into the contact area with the adjacent teeth.
  23. 23. Dr. Paul A. Tipton all contact areas are smoothed.
  24. 24. Dr. Paul A. Tipton finished prep
  25. 25. Dr. Paul A. Tipton the art and science of aesthetic dentistry porcelain veneers preparation techniques conventional slice
  26. 26. Dr. Paul A. Tipton the art and science of aesthetic dentistry slice preparations are used for imbrication, rotation, diastemas or missing interdental papillae.
  27. 27. Dr. Paul A. Tipton reduce the labial surface by 0.3 – 0.5mm with the use of depth cuts and the incisal edge by 2mm.
  28. 28. Dr. Paul A. Tipton The style of palatal incisal reduction depends upon the degree of anterior guidance and how much labial enamel is present
  29. 29. Dr. Paul A. Tipton break through the contact areas with a fine diamond bur and produce a line of draw of the mesial and distal surfaces
  30. 30. Dr. Paul A. Tipton prepare the mesial and distal margins for a 0.5mm chamfer finish line with an overall angle of convergence of 20 – 30° ( axial inclination of 10 - 15° ) using a 1mm thick chamfer bur
  31. 31. Dr. Paul A. Tipton round the corners so there is no stress in the porcelain restoration.
  32. 32. Dr. Paul A. Tipton the palatal incisal finish line is an inclined butt joint or palatal mini chamfer dependant upon anterior guidance and the amount of labial enamel
  33. 33. Dr. Paul A. Tipton finish the slice though the contact so that the mesio-palatal and disto- palatal vertical walls have 20 – 30° angle of convergence
  34. 34. Dr. Paul A. Tipton
  35. 35. Dr. Paul A. Tipton round the corners where the slice and incisal preps join
  36. 36. Dr. Paul A. Tipton check overall reduction with the matrix.
  37. 37. Dr. Paul A. Tipton the finished preparation from the labial looks like a dentine bonded crown preparation
  38. 38. Dr. Paul A. Tipton
  39. 39. Dr. Paul A. Tipton
  40. 40. Dr. Paul A. Tipton slice preps only where required
  41. 41. Dr. Paul A. Tipton
  42. 42. Dr. Paul A. Tipton
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  44. 44. Dr. Paul A. Tipton
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  46. 46. Dr. Paul A. TiptonDr. Paul A. Tipton st very thin labial enamel – so no labial reduction is required , the veneers are additive
  47. 47. Dr. Paul A. TiptonDr. Paul A. Tipton the dentine is hybridised
  48. 48. Dr. Paul A. TiptonDr. Paul A. Tipton
  49. 49. Dr. Paul A. TiptonDr. Paul A. Tipton the ¾ crown preparation wraps around the palatal aspect further than the slice
  50. 50. Dr. Paul A. TiptonDr. Paul A. Tipton
  51. 51. Dr. Paul A. TiptonDr. Paul A. Tipton
  52. 52. Dr. Paul A. TiptonDr. Paul A. Tipton
  53. 53. Dr. Paul A. TiptonDr. Paul A. Tipton
  54. 54. Dr. Paul A. TiptonDr. Paul A. Tipton
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  56. 56. Dr. Paul A. TiptonDr. Paul A. Tipton

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