title: Five-year survival of 3-unit fiber-reinforced composite fixed partial dentures in the posterior area.
abstract: OBJECTIVE
  The purpose of this clinical study was to evaluate the long-term outcome of three-unit posterior fixed partial dentures (FPDs) made of fiber-reinforced resin composite (FRC), and to identify design factors influencing the survival rate.
  
  
  METHODS
  77 patients (52 females, 25 males) received 96 indirectly made FRC FPDs, using pre-impregnated unidirectional glass-fibers, requiring manual wetting, as framework material. FPDs were surface (n=31) inlay (n=45) or hybrid (n=20) retained and mainly located in the upper jaw. Hybrid FPDs consisted of a wing retainer at canine and an inlay retainer at distal abutment tooth. Surface FPDs consisted of uplay and wing combinations. Follow-up period was at minimum 4.5 years, with checkups at every 1-2 years. The study was carried out by six operators in three centers in the Netherlands, Finland and Sweden. Survival rates, including reparable defects of FPDs, and success rates were determined.
  
  
  RESULTS
  Kaplan-Meier survival rate at 5 years was 71.2% (SE 4.8%) for success and 77.5% (SE 4.4%) for survival. Differences were not significantly different. Main failure modes were delamination and fracture of the FPD. Only FPDs with surface retainers showed debonding.
  
  
  CONCLUSIONS
  A success rate of 71% and a survival rate of 78% after 5 years was found. Survival rates of inlay, hybrid and surface retained FPDs did not significantly differ.
authors.affiliation: Department of Prosthodontics and Biomaterials Science, Institute of Dentistry, University of Turku, Finland. c.vanheumen@dent.umcn.nl
authors.forename: Céleste C M
authors.initials: CC
authors.lastname: van Heumen
authors.forename: Johanna
authors.initials: J
authors.lastname: Tanner
authors.forename: Jan W V
authors.initials: JW
authors.lastname: van Dijken
authors.forename: Ronald
authors.initials: R
authors.lastname: Pikaar
authors.forename: Lippo V J
authors.initials: LV
authors.lastname: Lassila
authors.forename: Nico H J
authors.initials: NH
authors.lastname: Creugers
authors.forename: Pekka K
authors.initials: PK
authors.lastname: Vallittu
authors.forename: Cees M
authors.initials: CM
authors.lastname: Kreulen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001641:Bicuspid; D002648:Child; D003188:Composite Resins; D019232:Dental Restoration Failure; D003779:Denture Design; D016379:Denture, Partial, Fixed, Resin-Bonded; D005260:Female; D005500:Follow-Up Studies; D005898:Glass; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D008963:Molar; D055815:Young Adult
chemical_list: D003188:Composite Resins; C009753:fiberglass