Porcelain Fused to Metal (PFM) Restorations
Porcelain Fused to Metal (PFM)
PFMs are composed of a metal alloy that fits directly on the tooth, and a porcelain layer to provide the tooth shape and color. We are now using SLM (Selective Laser Melting) alloys for semi-precious (66% CoCr, 25% Pd, 9% Mo) and non-precious (88.6% CoCr) PFMs. We still use the traditional wax and cast technique for High Noble alloys to create the SLM metal frame, and our CAD technicians design a full crown and produce an STL file. Our SLM machine prints an alloy accordingly and SLM copings are adjusted and fitted on the model. Finally, our ceramists layer Feldspathic porcelain on the SLM coping.
- Pros: The metal alloy provides a more accurate fit and better strength than that for an all ceramic crown.
- Cons: The chance of porcelain breakage is very little, but could result in inconvenient repairs or replacements.
- Usage: Single and multi unit bridges
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