title: Survival of cylindrical implants in composite grafted maxillary sinuses.
abstract: OBJECTIVE
  This retrospective study investigated the survival of dental implants placed in the maxilla after composite grafting of the sinus and an average of 55 months of loading.
  
  
  METHODS
  Maxillary sinuses of 88 patients were grafted with autogenous cancellous bone combined with dense hydroxyapatite particles. After an average healing period of 3.4 months, hydroxyapatite-coated titanium endosseous implants were placed. A total of 388 implants were placed in grafted sinus floors, and 82 were placed in onlay grafted nonsinus position in the canine region. The implants were loaded with overdentures and fixed bridges 4 months (mean) after implantation, with a follow-up for a mean of 55 months.
  
  
  RESULTS
  The cumulative implant survival was calculated according to the Kaplan-Meier method. Implant survival from the time of loading was 89% in full reconstructed cases and 90% in partially edentulous cases. The overall cumulative implant survival rate, including the loss in the surgical stage, was 82%.
  
  
  CONCLUSIONS
  Implant loss in composite grafted maxillae after 70 months of follow-up was similar to loss in nongrafted maxillae.
authors.affiliation: Department of Oral Maxillofacial Surgery, Prosthodontics and Special Dental Care, Faculty of Medicine, University of Utrecht, The Netherlands.
authors.forename: M L
authors.initials: ML
authors.lastname: Kaptein
authors.forename: C
authors.initials: C
authors.lastname: de Putter
authors.forename: G L
authors.initials: GL
authors.lastname: de Lange
authors.forename: P A
authors.initials: PA
authors.lastname: Blijdorp
mesh_terms: D000328:Adult; D000368:Aged; D016025:Bone Transplantation; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery*; D008875:Middle Aged; D009092:Mucous Membrane / Q000293:injuries; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods*; D017063:Outcome Assessment, Health Care; D012189:Retrospective Studies; D016019:Survival Analysis
chemical_list: D015921:Dental Implants