All Ceramic Crown Preparation-Dr. Sheeba

Question 1

All Ceramic Crown: Indications

Answer 1

• High Esthetic requirement
  
  • proximal or facial caries, not able to restore with composite
• Incisal edge intact
• Endo treated teeth with posts and cores
• Favorable distribution of occlusal load
• Thin Gingival biotype
  
  • when there ia greater chance for recession and margin exposure
• no skilled lab tech
  
  • better esthetics are easier achieved with full ceramic restoration than PFM

Question 2

All Ceramic Crown: Advantages vs Disadvantages

Answer 2

• Advantages:
  
  • esthetic
  • translucency
  • good tissue response even for subgingival margins
  • maintains highly polished and glazed surface
  • some ceramics can be bonded to tooth structure
• Disadvantages:
  
  • reduced strength vs PFM
    
    • no metal substructure
  • proper prep extremely crucial
  • Brittle material
  • substantial tooth reduction required
  • opposing tooth wear
  • only used as single restortion

Question 3

All Ceramic Crown: Contraindications

Answer 3

• more conservative restoration can be used
• superior strength is needed=PFM
• extensive caries
• insufficient coronal tooth structure for support
• Thin teeth Faciolingually
• unfavorable distribution of occlusal load
  
  • brittle material
• Posterior teeth
  
  • increased occlusal load
  • decreased esthetic demand
• Bruxism