What materials are used in a dental crown?

Zirconia has shifted from a back-molar workhorse to the most versatile crown material in the current lab workflow. High-translucency zirconia (HT and UHT grades) now delivers anterior esthetics that close the gap with layered porcelain, while monolithic construction eliminates the chipping risk inherent to PFM veneering porcelain. For posterior full-arch cases, monolithic zirconia processed at 1,500 degrees Celsius hits flexural strength levels that outlast almost every occlusal condition a dentist will encounter clinically.

Lithium disilicate (IPS e.max is the dominant commercial form) remains the material of choice when shade depth, translucency gradients, and incisal characterization matter most. It requires adequate reduction (1.5 mm facial minimum) and is contraindicated under heavy parafunction. Prosthodontists planning anterior single-unit or three-unit cases with demanding shade requirements will still specify e.max first. For high-load implant-supported crowns, zirconia wins on fracture resistance every time.

PFM crowns still appear in practices with older preparation protocols or where metal copings are preferred for fit verification. Full-cast metal (gold or base-metal alloy) has a niche in posterior lingual cusps and subgingival margin cases where tissue response and marginal seal outrank esthetics. PMMA provisionals, milled from pre-polymerized pucks, handle transitional loading for implant cases and temporization during full-arch treatment. Knowing which material fits which clinical scenario saves chair time on remakes and protects margin integrity at delivery.