Porcelain Fused to Metal
A fixed dental restoration in which a layer of dental porcelain is fused to a cast metal alloy substructure, combining the aesthetics of ceramic with the strength of metal.
Full Definition
Porcelain fused to metal (PFM) is a type of dental crown or bridge restoration consisting of a metal alloy coping or framework over which layers of feldspathic porcelain are applied and fired to create a tooth-coloured surface. PFM restorations have been a standard of care for several decades and appear frequently in laboratory prescriptions, cost schedules, and insurance documentation. Editors should note that 'porcelain fused to metal' is the full preferred term; the abbreviation 'PFM' should be expanded at first use in formal publications. Confusion with 'all-ceramic' or 'full-contour' restorations is common and should be avoided.
Usage
Usage note: The abbreviation PFM is already present in the database. This entry covers the full expanded term. Avoid the archaic 'porcelain jacket crown' as a synonym, which is technically a distinct restoration type.
In Context
- "The laboratory invoice listed twelve porcelain fused to metal crowns billed at the agreed rate." — Laboratory invoice
- "When transcribing insurance narratives, expand 'PFM' to 'porcelain fused to metal' at first occurrence." — Editorial style guideline