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Dental crown preparation

    • Introduction
    • Principles – biologic consideration
    •                 – Mechanical considerations
        • Esthetic considerations
    • Biological – prevention of damage during tooth preparation
    •   – causes of injury- chemical
    •               – bacteria
    •               – temperature
    •   – conservation of tooth structure
    •   methods for controlled tooth reduction
    •   – considerations affecting future dental health
    •   – axial reduction
    •   – margin placement
    •   – margin adaptation
    •   – margin geometry
    •   finish lines and armamentarium
    •   – occlusal consideration
    •   – preventing tooth fracture
          • Retention form
            • Magnitude of the dislodging forces
            • Geometry of tooth preparation
            • Taper
            • Surface area
            • Stress concentration
            • Type of preparation
            • Roughness of the surface being cemented
            • Materials being cemented
            • Type of luting agent
            • Film thickness of the luting agent
        •   –   Resistance form
            • Magnitude of direction of the dislodging force
            • Geometry of the tooth preparation
            • Physical properties of the luting agent
            • Adequate tooth structure
            • Margin design

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