title: A 5-year prospective follow-up study of implant-supported fixed prostheses in patients subjected to maxillary sinus floor augmentation with an 80:20 mixture of bovine hydroxyapatite and autogenous bone.
abstract: BACKGROUND
  Prospective long-term follow-up studies evaluating the use of bone substitutes to enable dental implant placement and integration are rare.
  
  
  OBJECTIVE
  This study was undertaken to evaluate the survival rate of dental implants placed 6 months after maxillary sinus floor augmentation using a mixture of 80% bovine hydroxyapatite (BH) and 20% autogenous bone (AB).
  
  
  METHODS
  Twenty patients subjected to 30 maxillary sinus floor grafting procedures using fibrin glue and an 80:20 mixture of BH and AB to enable placement of dental implants 6 months later were followed for 5 years of functional loading. Clinical and radiographic examinations of the grafts and implants were performed.
  
  
  RESULTS
  After 5 years of functional loading with fixed bridges, 15 of 108 implants had been lost, giving a cumulative survival rate of 86%. The mean marginal bone loss after 5 years was 1.3 +/- 1.1 mm.
  
  
  CONCLUSIONS
  Grafting of the maxillary sinus with a mixture of BH and AB and later placements of turned implants could be performed with predictable long-term results. All but one of the patients who were observed had functional fixed bridges after 5 years of functional loading.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Public Health Service, Gävle, Sweden. mats.hallman@lg.se
authors.forename: Mats
authors.initials: M
authors.lastname: Hallman
authors.forename: Lars
authors.initials: L
authors.lastname: Zetterqvist
mesh_terms: D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000601:surgery; D000818:Animals; D018786:Bone Substitutes; D016025:Bone Transplantation / Q000379:methods; D002417:Cattle; D003758:Dental Implantation, Endosseous; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000534:rehabilitation; D015993:Life Tables; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery*; D008875:Middle Aged; D008903:Minerals; D013516:Oral Surgical Procedures, Preprosthetic; D011446:Prospective Studies; D011859:Radiography
chemical_list: C077540:Bio-Oss; D018786:Bone Substitutes; D008903:Minerals