title: [Three-year clinical observation and failure analysis of all-ceramic restorations made by chair-side computer aided design and computer aided manufacture system].
abstract: OBJECTIVE
  To evaluate 3-year clinical performance of restorations made by chair-side computer aided design and computer aided manufacture (CAD/CAM) system and analyze possible failure reasons.
  
  
  METHODS
  Thirty-two single-tooth large all-ceramic restorations were fabricated using a computer aided design and computer aided manufacture (CAD/CAM) system. Fourteen premolars and 18 molars were restored with machined porcelain blocks. Of these 11 inlays, 10 crowns, and 11 endocrowns were finished respectively. The integrity and marginal fitness were evaluated at 3 years after insertion.
  
  
  RESULTS
  Twenty-eight restorations were rated as good; 2 were fractured (1 molar-crown and 1 molar-inlay) and had to be replaced; and 2 were found marginal defects (1 molar-inlay and 1 premolar-inlay). The failures occurred mostly in the inlays and molars.
  
  
  CONCLUSIONS
  With proper indication selection and careful tooth preparation, restorations with chair-side CAD/CAM were clinical success both in function and esthetics.
authors: Department of Prosthodontics, Faculty of Stomatology, Capital University of Medical Sciences, Beijing 100050, China.
authors: Su
authors: S
authors: Chen
authors: Zhen-ting
authors: ZT
authors: Zhang
mesh_terms: D000328:Adult; D017076:Computer-Aided Design; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D017211:Treatment Failure; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D003776:Dental Porcelain