Department of Restorative Dentistry

                     Fixed Prosthodontics RSTD 3040


                               ...
LECTURE OUTLINE

  I.     Simplistic components of crown preparation




  II.    5 Principles of crown preparations




 ...
ii. Gingival Tissues




c. Protection of pulpal health




       i. Chemical irritation



      ii. Microorganisms



 ...
1. Excessive taper



             2. Occlusal surface




             3. Axial surfaces




             4. Margin desig...
f. Occlusion (2 slides)




V.   Mechanical concerns
     a. Retention form
           i. Path of withdrawal (taper)




 ...
c. Structural Durability




VI.   Esthetic concerns
      a. The esthetic zone




             i. The smile line




   ...
c. Patient acceptance
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Fixed Prosthodontics RSTD 3040

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Fixed Prosthodontics RSTD 3040

  1. 1. Department of Restorative Dentistry Fixed Prosthodontics RSTD 3040 Dr. V. Swain TITLE: Fixed Prosthodontic Restorations: Principles of Design PURPOSE: An introduction to the basic principles that serve to guide a practitioner in the process of designing fixed prosthetic restorations. A focus will be placed on 3 separate categories of functional demands: esthetic, biological and mechanical. SPECIFIC OBJECTIVES: To Discuss: 1. Basic components of a crown preparation 2. Essential principles of crown preparation 3. Three categories of functional demands 4. Biological concerns of crown preparations 5. Mechanical concerns of crown preparations 6. Esthetic concerns of crown preparations SUGGESTED READINGS: Contemporary Fixed Prosthodontics – 4th Edition. Rosenstiel, Land & Fujimoto. Ch 7: Principles of Tooth Preparation.
  2. 2. LECTURE OUTLINE I. Simplistic components of crown preparation II. 5 Principles of crown preparations III. 3 categories of functional demands IV. Biological concerns a. Protection of adjacent teeth b. Protection of soft tissues i. Tongue and cheeks
  3. 3. ii. Gingival Tissues c. Protection of pulpal health i. Chemical irritation ii. Microorganisms iii. Extreme temperatures 1. Heat increases with: 2. Water Coolant iv. Excessive reduction (iatrogenic)
  4. 4. 1. Excessive taper 2. Occlusal surface 3. Axial surfaces 4. Margin design 5. Apical extension d. Axial reduction e. Margin placement i. supragingival ii. subgingival
  5. 5. f. Occlusion (2 slides) V. Mechanical concerns a. Retention form i. Path of withdrawal (taper) ii. Surface area iii. Preparation design iv. Luting agent b. Resistance form
  6. 6. c. Structural Durability VI. Esthetic concerns a. The esthetic zone i. The smile line b. Restoration type i. Partial veneer restorations ii. Metal ceramic restorations
  7. 7. c. Patient acceptance

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