1. involves
2. Factors Preventing Restoration Dislodgement
3. Factors Related to Marginal Integrity
   1. determine termination of the restoration
   2. locate the margins in self cleansing areas
4. Resistance
   1. Circumferential Irregularities
   2. Occlusal Integrity
   3. Occluso-gingiva height
5. Marginal Adaptation
   1. fit
   2. strength
   3. location
6. Marginal Geometry
   1. Knife Edge
   2. Chamfer
   3. Shoulder margin
   4. 120 Degree Sloped Shoulder
   5. Beveled Shoulder Margin
7. Types of Occlusal Forces
   1. occlusal or forces along the path of insertion
   2. twisting or rotational forces
8. Factors Contributing to Structural Durability
   1. Incisal/Occlusal Reduction
      1. 1.5-2.0 mm
         1. occlusion
         2. patient's age
         3. type of restoration
      2. 1.0 mm for non-functional cusp
      3. 1.5 mm for functional cusp
         1. functional cusp bevel
            1. resist forces
            2. prevent perforation
            3. provide anatomy
   2. Axial reduction
      1. 0.3-0.5 mm cevical
      2. 1.0 mm occlusal
9. Retention
   1. Ratio of Preparation Diameter to the Axial Wall Height
   2. Taper or Convergence of Axial Wall
   3. Surface Area of Axial Wall Height