All-Metal (e.g. Gold Alloy)
Advantages
Metal occlusal surfaces protect weak cusps and cause minimal wear of opposing dentition
Excellent clinical longevity
Considerations
Contraindicated for patients with metal allergies or concerns about metal (ref. 11)
Esthetics may be unacceptable for some patients
Conservative tooth preparation
Porcelain Fused to Metal (PFM)
Advantages
Excellent esthetics possible
Predictable service and clinical longevity
Versatility (single units to long span bridges)
(ref. 12)
Considerations
The possibility for metal exposed margins. Restorations may appear chalky, opaque or gray with time
Contraindicated for patients with metal allergies or concerns about metal
(ref. 13)
• May wear opposing dentition
All-Ceramic and Composite Resin Indirect Restorative Materials
Advantages
High esthetic possibilities. No metal exposed margins. No chalky, opaque or gray appearance
Non-metal for patients with metal allergies or for those who do not want metal in their mouth
(ref. 15)
Considerations
Long-term clinical trial results are not available (ref. 16)
Cementation is more technique-sensitive and time consuming than for conventional crowns (ref. 16)
Occlusal adjustments are made after cementation. If the cemented restoration does not fit, removal from the tooth may be extremely difficult (ref. 16)
Gingival irritation is possible given inadequately finished margins (ref. 16)
The potential for higher fracture rates in posterior teeth (ref. 12)
May wear the opposing dentition (ref. 17)
Contraindicated for:
- Preparations with short clinical crown height
- Placement in posterior, stress bearing areas
- For bruxers, clenchers, or patients with no canine guidance
(ref. 16)




Copyright
© 1999 3M. All rights reserved.