title: [Long-term observation of 920 porcelain fused to metal prostheses].
abstract: OBJECTIVE
  To evaluate the long-term clinical results of porcelain fused to metal prostheses.
  
  
  METHODS
  Since January 1995, 920 porcelain fused to metal prostheses were fabricated. The long-term outcome were evaluated according to the condition of the prosthese, abutment and the periodontal tissue in the respects of successful rate and causes of failure.
  
  
  RESULTS
  74 patients were found to be during the follow up period, including 36 anterior crowns (46 units), 18 posterior crowns (22 units), 12 percentage of anterior bridges and 8 posterior bridges. The overall failure rate was 8.04%, 4.84% for crown, 8.77% for bridge. The failed prostheses was 5.39%.
  
  
  CONCLUSIONS
  Porcelain fused to metal prostheses is an ideal method for restoration. The standard process both for the clinician and the technician must be obeyed to improve the success rate.
authors.affiliation: Department of Prosthodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China.
authors.forename: Yong-Lin
authors.initials: YL
authors.lastname: Jiang
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Weng
authors.forename: Fu-Qiang
authors.initials: FQ
authors.lastname: Zhang
mesh_terms: D003442:Crowns; D000044:Dental Abutments; D003776:Dental Porcelain / Q000627:therapeutic use*; D017266:Dental Prosthesis; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003829:Denture, Partial; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D016876:Metal Ceramic Alloys; D003776:Dental Porcelain