title: Rehabilitation of the edentulous posterior maxilla after sinus floor elevation using deproteinized bovine bone:  a 9-year clinical study.
abstract: OBJECTIVE
  To evaluate the long-term survival rate of rough-surfaced implants placed in maxillary sinuses augmented with deproteinized bovine bone (Bio-Oss; Geistlich Pharma AG, Wolhusen, Switzerland).
  
  
  METHODS
  Thirteen maxillary sinuses were augmented in 10 patients with Bio-Oss. After an average healing period of 13.8 months, 24 implants were placed. In 4 cases, biopsies were performed and submitted to histological analysis. Clinical and radiographic evaluation was performed 9 years after implant placement and minimum 8 years after functional loading.
  
  
  RESULTS
  At the 9-year control, all the 24 implants were still functional. Thus, the implant survival rate was 100%.
  
  
  CONCLUSIONS
  Bio-Oss is an acceptable substitute to the autogenous bone, and it can be used as a unique material for sinus floor elevation. Rough-surfaced implants placed in 100% Bio-Oss grafts showed a high survival rate (100%) on the long term. Larger clinical trials are necessary to confirm our results.
authors.affiliation: rita.oliveiragrbavac@gmail.com
authors.forename: Rita
authors.initials: R
authors.lastname: Oliveira
authors.forename: Marc
authors.initials: M
authors.lastname: El Hage
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Carrel
authors.forename: Tommaso
authors.initials: T
authors.lastname: Lombardi
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Bernard
mesh_terms: D000328:Adult; D000818:Animals; D018786:Bone Substitutes; D002417:Cattle; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D005260:Female; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation*; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery*; D008875:Middle Aged; D008903:Minerals; D059546:Sinus Floor Augmentation / Q000379:methods*; D013499:Surface Properties; D014025:Titanium
chemical_list: C077540:Bio-Oss; D018786:Bone Substitutes; D015921:Dental Implants; D008903:Minerals; D014025:Titanium