title: Bone resorption around dental implants placed in grafted sinuses: clinical and radiologic follow-up after up to 4 years.
abstract: OBJECTIVE
  The long-term results of endosseous implants depend on the maintenance of bone support. The aim of this study was to evaluate radiologically bone resorption around dental implants placed in grafted sinuses after up to 4 years of function.
  
  
  METHODS
  Between 1997 and 2001, augmentation of the maxillary sinus floor with alloplastic (Biostite) or xenogenic (Bio-Oss) materials was performed in 34 patients.
  
  
  RESULTS
  Eighteen patients participated in the study. Twenty-six sinus augmentations were performed on these 18 patients, and they received 37 implants. The change in marginal bone level around the implants at the mesial side was 1 mm during the first year after the abutment connection, followed by an annual loss of 0.1 mm. The change in marginal bone level around the implants at the distal side was 1.1 mm during the first year after the abutment connection followed by an annual loss of 0.2 mm.
  
  
  CONCLUSIONS
  The implant survival rate observed in this study is in line with data previously reported for patients treated with implants in the posterior maxilla without bone atrophy. The results for implants placed into sinuses grafted with Bio-Oss were similar to the results for implants placed in sinuses grafted with Biostite.
  
  
  CONCLUSIONS
  Although this study involved a limited number of procedures, it confirmed that alloplastic and xenogenic materials can be reliable for bone regeneration in subantral cavities. The angular defects present both at the distal and mesial sides of the implants were comparable to those observed at implants placed in native bone.
authors.affiliation: Department of Oral Implants, Dental Clinic Instituti Clinici Perfetionarento, University of Milan, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Maiorana
authors.forename: Davide
authors.initials: D
authors.lastname: Sigurtà
authors.forename: Arrigo
authors.initials: A
authors.lastname: Mirandola
authors.forename: Giuliano
authors.initials: G
authors.lastname: Garlini
authors.forename: Franco
authors.initials: F
authors.lastname: Santoro
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D001857:Bone Matrix / Q000637:transplantation; D018786:Bone Substitutes / Q000627:therapeutic use; D002508:Cephalometry; D003094:Collagen / Q000627:therapeutic use; D000044:Dental Abutments; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006025:Glycosaminoglycans / Q000627:therapeutic use; D006801:Humans; D006882:Hydroxyapatites / Q000627:therapeutic use; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D008439:Maxillary Diseases / Q000000981:diagnostic imaging*; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D008903:Minerals / Q000627:therapeutic use; D016348:Osseointegration; D011862:Radiography, Panoramic
chemical_list: C077540:Bio-Oss; C080295:Biostite; D018786:Bone Substitutes; D015921:Dental Implants; D006025:Glycosaminoglycans; D006882:Hydroxyapatites; D008903:Minerals; D003094:Collagen