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Shlinberg Temporary Crown And Bridge 87 8 21
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Shlinberg Temporary Crown And Bridge 87 8 21

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Shlinberg Temporary Crown And Bridge 87 8 21

Shlinberg Temporary Crown And Bridge 87 8 21


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  • 1. PROVISIONAL RESTORATIONS
  • 2. A good provisional restoration should satisfy the following requirements
    • Pulpal protection
    • Positional stability.
    • Occlusal function
    • Easily cleaned
    • Non impinging margins
    • Strength and retention.
    • Esthetics
  • 3. Types of Provisional Restorations
    • zinc oxide-eugenol
      • small intracoronal inlay
    • to
    • provisional crowns
    • and provisional fixed partial dentures
  • 4. Prefabricated vs Custom Restorations
    • Prefabricated
      • only for single-tooth restorations
      • stock aluminum cylinders ("tin cans")
      • anatomic metal crown forms
      • clear celluloid shells
      • Tooth colored polycarbonate crown forms.
    • Custom crowns and fixed partial dentures
      • Resins
        • direct or indirect.
  • 5. Direct vs. Indirect Techniques
    • on the actual prepared teeth in the mouth.
    • outside of the mouth
    • on a cast made of quick-set plaster
    • direct technique
    • indirect technique
  • 6.
    • Poly methyl methacrylate
    • Poly ethyl methacrylate
    • Poly vinyl ethyl methacrylate
    • Bis acryl composite resin
    • Visible light-cured (VLC)
    Resins for Provisional Restorations Crown
  • 7. Type Brand Manufacturer Advantages Disadvantages Poly(methyl methacrylate) Alike Cf & Br Resin Duralay Jet GC America LD Caulk Reliance Dental Lang Dental Good marginal fit' 5 Good transverse strength 15 Good polishability 15 Durability 16 High exothermic heat increase 17 - 18 Low abrasion resistance 15 Free monomer toxic to pulp 16 High volumetric shrinkage 16 Poly(ethyl methacrylate) Snap Parkeli Biomaterials Good polishability 15 Minimal exothermic heat increase 17 Good stain resistance 15 Low shrinkage 8 Surface hardness 15 Transverse strength 15 Durability 16 Fracture toughness 19 Poly(vinylethyl methacrylate) Trim Harry Bosworth Good polishability 15 Minimal exothermic heat increase' 7 Good abrasion resistance 15 Good stain resistance 15 Flexibility 8 Surface hardness 15 Transverse strength 15 Esthetics 8 Fracture toughness 19 Bis-acryl composite Protemp II ESPE-Premier Good marginal fit 15 Low exothermic heat increase 18 Good abrasion resistance 15 Good transverse strength 15 Low shrinkage 8 Surface hardness 15 Less stain resistance 15 Limited shade selection 8 Limited polishability 8 Brittle 16 VLC uerthane di methacrylate Triad Dentsply York High surface hardness 15 Good transverse strength 15 Good abrasion resistance 15 Controllable working time 20 Color stability 15 Marginal fit 15 Less stain resistance 15 Limited shade selection 20 • Expensive 11 ' 21 Brittle
  • 8. Techniques for Custom Provisional Restorations
    • Over impression-Fabricated Provisional
    • Template-Fabricated Provisional Fixed Partial Denture
  • 9. Overimpression-Fabricated Provisional
  • 10. Over impression-Fabricated Provisional
    • Defects, such as a missing cusp (arrow), should be filled in on the cast
    • Utility wax is placed in the defect
  • 11. Over impression-Fabricated Provisional
    • Overimpression is made from the diagnostic cast
    • Thin edges in the gingival areas of the overirepression are cut away.
  • 12. Over impression-Fabricated Provisional
    • Alginate impression is made of the prepared tooth
    • Untrimmed quick-set plaster cast.
  • 13. Over impression-Fabricated Provisional
    • Properly trimmed plaster cast.
    • The cast is tried in the overimpression before proceeding
  • 14. Over impression-Fabricated Provisional
    • Separating medium is painted on the plaster cast.
    • Acrylic resin is mixed in a dappen dish
  • 15. Over impression-Fabricated Provisional
    • Resin is placed into the overirnpression
    • The cast is seated firmly in the overimpression.
  • 16. Over impression-Fabricated Provisional
    • Cast held in place with a rubber
  • 17. Over impression correct seating
    • overimpressions: correctly seated (A)
    • if the cast is pushed to one side (B);
    • overseating of the cast will produce a provisional restoration (C).
  • 18. Over impression-Fabricated Provisional
    • The cast can be broken to remove the provisional restoration.
    • Any plaster remaining in the provisional restoration is removed.
  • 19. Over impression-Fabricated Provisional
    • flash is ground off with a carborundum disc
    • Margins are smoothed with a sandpaper disc.
  • 20. Over impression-Fabricated Provisional
    • Occlusion on the restoration is checked in the mouth.
    • Occlusion is adjusted outside the mouth
  • 21. Over impression-Fabricated Provisional
    • The restoration is polished with pumice.
    • Zinc oxide-eugenol cement is often mixed with a small amount of petrolatum
  • 22. Over impression-Fabricated Provisional
    • An explorer is used to remove cement from the gingival crevice
  • 23. Cementation Armamentarium
  • 24. Template-Fabricated Provisional Fixed Partial Denture
    • A crown form or a denture tooth is placed in the edentulous space on the diagnostic cast
    • A rope of Mor-Tight is placed around the periphery of the cast.
  • 25. Template-Fabricated Provisional Fixed Partial Denture
    • The plastic sheet is secured in the frame of the vacuum forming machine
    • The plastic sags as it is heated to the proper tempera­ture.
  • 26. Template-Fabricated Provisional Fixed Partial Denture
    • The frame is pulled down over the perforated stage of the vacuum forming machine
    • The plastic is cut to remove the template from the diagnostic cast.
  • 27. Template-Fabricated Provisional Fixed Partial Denture
    • The plastic can be heated in a wire frame over a Bunsen burner
    • The plastic sheet is positioned over the diagnostic cast.
  • 28. Template-Fabricated Provisional Fixed Partial Denture
    • The plastic template is adapted by exerting heavy force on the impression tray of silicone putty.
    • The tray full of putty is pulled off the adapted plastic
  • 29. Template-Fabricated Provisional Fixed Partial Denture
    • Excess is trimmed from the periphery of the template
    • The quick-set plaster cast should be trimmed back to the dotted line
  • 30. Template-Fabricated Provisional Fixed Partial Denture
    • The template is tried on the cast to verify the fit
    • Some acrylic resin is placed in the interproximal areas of the cast
  • 31. Template-Fabricated Provisional Fixed Partial Denture
    • Resin is placed in the template
    • The template is held in position with rubber bands
  • 32. Template-Fabricated Provisional Fixed Partial Denture
    • The lingual ridge of the saddle (arrow) is removed to open the lingual embrasure of the pontic.
    • The pontic is trimmed to widen the embrasures and create cleanable contours.
  • 33. Template-Fabricated Provisional Fixed Partial Denture
    • A silicone putty index is formed over the template on the diagnostic cast
    • VI.C resin is placed in the clear template
  • 34. Template-Fabricated Provisional Fixed Partial Denture
    • The resin-loaded template is forcefully seated on the quick-set plaster cast.
    • silicone putty index is seated over the template
  • 35. Template-Fabricated VLC Provisional Restoration
  • 36. Template-Fabricated VLC Provisional Restoration
    • The cast with the resin-loaded template is placed in the light-polymerizing unit.
    Excess resin is cut off with crown and bridge scissors
  • 37. Template-Fabricated VLC Provisional Restoration
    • Monomer is applied to the over impress ion with a needle-tipped liquid applicator.
    • Enough polymer is applied to turn the surface of the impression dull.
  • 38. Template-Fabricated VLC Provisional Restoration
    • Gingival flash is removed and gingival embrasures are opened
  • 39.
    • The resin-filled shell is seated on the prepared teeth on the cast.
    • The resin-filled shell is seated on the prepared teeth in the mouth
  • 40. Template-Fabricated VLC Provisional Restoration
    • Impression material is loaded into a quadrant tray for the over-impression.
    • Border of the overimpression is trimmed
  • 41. Template-Fabricated VLC Provisional Restoration
    • A gingival trough is cut with a no. 8 bur in the facial and lingual surfaces of the imprint of the tooth being restored
    • A midsagittal section of the overimpression and the provisional restoration shows a bulk of material (arrows) near the margins.
  • 42. Template-Fabricated VLC Provisional Restoration
    • The catch should be engaged in the slot in the threaded plunger at the back of the base syringe.
    • The plunger of the base syringe is rotated one full turn to produce one measure of base resin.
  • 43. Template-Fabricated VLC Provisional Restoration
    • The catch must be engaged in the slot in the threaded middle plunger at the back of the catalyst syringe.
    • The threaded middle plunger of the catalyst syringe is rotated one click to produce enough catalyst to mix with one measure of base paste.
  • 44. Template-Fabricated VLC Provisional Restoration
    • Catalyst and base are mixed on the mixing pad.
    • Syringe is loaded with mixed resin.
  • 45. Template-Fabricated VLC Provisional Restoration
    • Mixed resin is expressed into the imprint of the tooth for which the provisional restoration is being fabricated.
    • The rubbery provisional restoration is teased from the tooth.
  • 46. Template-Fabricated VLC Provisional Restoration
    • The partially polymerized provisional restoration is removed from the impression.
  • 47. Techniques for Prefabricated Provisional Restorations
  • 48. Anterior Polycarbonate Crown
  • 49. Armamentarium
    • 1. Anterior sectional impression tray (one only)
    • 2. Alginate
    • 3. Rubber bowl
    • 4. Spatula
    • 5. Quick-set plaster
    • 6. Polycarbonate crown kit
    • 7. Pencil
    • 8. Straight handpiece
    • 9. Acrylic bur
    • 10. Coarse garnet disc on Moore mandrel
    • 11. Burlew disc on mandrel
    • 12. Large camel-hair brush
    • 13. Cement spatula
    • 14. Dappen dish
    • 15. IPPA plastic instrument
    • 16. Separating medium
    • 17. Monomer and polymer
    • 18. Medicine dropper
    • 19. Muslin rag wheel
    • 20. White polishing compound
    • 21. Miller forceps
    • 22. Articulating paper
    • 23. Paper pad
    • 24. Zinc oxide-eugenol cement
    • 25. Petrolatum
    • 26. Explorer
    • 27. Mouth mirror
    • 28. Dental floss
  • 50. Anterior Polycarbonate Crown
    • An anterior sectional tray is used to make an alginate impression of the prepared tooth
    • Quick-set plaster cast and the impression in which it was made.
  • 51. Anterior Polycarbonate Crown
    • Mold guide is held adjacent to the cast to select the correct crown size.
    • With the crown on the preparation, a mark is made at a distance from the labial margin that is equal to the amount by which the crown exceeds the height of adjacent teeth.
  • 52. Anterior Polycarbonate Crown
    • Excess gingival length that extends beyond the mark is cut off.
    • Polycarbonate crown after removal of the excess length. The tab is left on at this point to facilitate handling
  • 53. Anterior Polycarbonate Crown
    • The preparation and adjacent portions of the plaster cast are painted with separating medium.
    • The crown filled with resin is placed onto the pre­pared tooth on the plaster cast
  • 54. Anterior Polycarbonate Crown
    • Gingival excess created by the expressed acrylic is trimmed back with a garnet disc until the margin coincides with the imprint of the finish line (arrow)
    • Occlusion is checked with articulating paper.
  • 55. Anterior Polycarbonate Crown
    • Axial surfaces near the margin are smoothed with a Burlew disc.
    • Axia! surfaces are polished with white polishing com­pound on a muslin rag wheel.
  • 56. Anterior Polycarbonate Crown
    • All cement is removed from the gingival crevice with an explorer.
  • 57.  
  • 58. Provisional Crown for an Endodontically Treated Tooth
  • 59. Preformed Anatomic Metal Crown
    • 1. Minimal tooth preparation
    • 2. Measurement and selection of crown
    • 3. Trimming and adaptation of gingival margin
    • 4. Occlusal adjustment
    • 5. Cementation
  • 60. Preformed Anatomic Metal Crown
    • Maxillary second molar with a fractured distolingual
    • Occlusal clearance is obtained with a diamond or a no. 1 70 bur.
  • 61. Preformed Anatomic Metal Crown
    • Functional cusp bevel is placed with the same instru­ment
    • Proximal reduction usually consists of removing an existing amalgam restoration
  • 62. Preformed Anatomic Metal Crown
    • Measuring gauge for selecting a preformed metal crown
    • Mesiodistal measurement of the space is obtained,
  • 63. Preformed Anatomic Metal Crown
    • Gingival margins can be flared slightly on the stretching block.
    • Marginal ridge height discrep­ancy between the restoration and the adjacent tooth is estimated.
  • 64.  
  • 65.
    • در تکنیک مستقیم direct کدام رزین زیر را توصیه نمی نمایید ؟
    • Poly methyl methacrylate
    • Poly ethyl methacrylate
    • Poly vinyl ethyl methacrylate
    • Bis acryl composite resin
    • Visible light-cured (VLC)