title: The confusing array of tooth-colored crowns.
abstract: The venerable PFM crown or fixed prosthesis still dominates the tooth-colored restoration market. However, use of PFMs is declining slightly, as the many new all-ceramic and resin-based composite crowns and fixed-prosthesis products flood the market. Several situations may indicate the use of materials other than PFM. They include patients requiring a high level of esthetic acceptability, patients with proven or perceived allergies to the metals used in dentistry and bruxing or clenching patients with metal allergies or desire to eliminate metal from their mouths. PFM restorations have been proven during 40 years of successful use. They provide acceptable esthetics for most situations, minimal fracture during service, proven ability to serve in multiple-unit situations and excellent fit, and the profession has detailed knowledge of these restorations' advantages, disadvantages and physical characteristics. PFM restorations have only a few well-known negative characteristics. Be cautious as you elect to move from the reliability and positive history of PFM to relatively unknown types of restorations.
authors.affiliation: Clinical Research Associates, Provo, Utah 84604, USA.
authors.forename: Gordon J
authors.initials: GJ
authors.lastname: Christensen
mesh_terms: D002012:Bruxism / Q000150:complications; D002516:Ceramics / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns / Q000191:economics; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D004955:Esthetics, Dental; D005250:Fees, Dental; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D006967:Hypersensitivity / Q000150:complications; D016876:Metal Ceramic Alloys / Q000737:chemistry
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D006047:Gold Alloys; D016876:Metal Ceramic Alloys