1. Principal of tooth
preparation
Ch:7 rosentiel

2. Principal of tooth preparation
1. Biologic considerations: health of the oral tissues.
2. Mechanical considerations: integrity and durability of
the restoration.
3. Esthetic considerations: appearance of the patient.

4. • Adjacent teeth:
• Soft tissues
• Pulp of the tooth

5. • Extreme temperatures (speed,
pressure, condition of the cutting instrument)
• Chemical irritation
• Microorganisms

6. PULP
 CONSERVATION OF TOOTH STRUCTURE

13. Esthetic restorations include :
 Partial veneer crowns.
 Metal-ceramic restorations.
 All-ceramic restorations.