title: Bone maintenance 5 to 10 years after sinus grafting.
abstract: OBJECTIVE
  This radiographic study determined the amount of bone around hydroxyapatite (HA)-coated dental implants that were placed into bone-grafted maxillary sinuses.
  
  
  METHODS
  Postoperative complex motion tomograms using the Grossman technique were taken on 16 patients who had 27 maxillary sinus grafts performed using particulate autogenous iliac bone with and without demineralized bone, autogenous iliac corticocancellous block with and without demineralized bone, and autogenous jaw bone with demineralized bone. Bone levels were measured from the new floor of the grafted sinus to the apex of the implant and to the alveolar crest. The resulting bone level measures were compared with the type of graft used. All patients had been restored for 5 to 10 years after simultaneous graft and implant placement.
  
  
  RESULTS
  For all patients summed together, the average amount of bone from the top of the graft to the apex of the implant was 3.3 +/- 3.1 mm, and the average amount of bone from the top of the graft to the alveolar crest was 17.6 +/- 3.1 mm. The average level of bone in the sinuses of patients grafted with autogenous iliac bone was greater than the average level of bone in those grafted with autogenous bone combined with demineralized bone.
  
  
  CONCLUSIONS
  The results of this study indicate that autogenous bone grafts are maintained in the maxillary sinus, but the results with autogenous bone alone are better than when demineralized bone is added. However, this difference may not be clinically significant.
authors.affiliation: Department of Oral and Maxillofacial Surgery, LSU School of Dentistry, New Orleans 70119, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Block
authors.forename: J N
authors.initials: JN
authors.lastname: Kent
authors.forename: F U
authors.initials: FU
authors.lastname: Kallukaran
authors.forename: K
authors.initials: K
authors.lastname: Thunthy
authors.forename: R
authors.initials: R
authors.lastname: Weinberg
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015519:Bone Density; D016025:Bone Transplantation / Q000379:methods*; D003648:Decalcification Technique; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003828:Denture, Overlay; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016018:Least-Squares Analysis; D016014:Linear Models; D008297:Male; D008437:Maxilla; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods*; D010012:Osteogenesis / Q000502:physiology*; D014057:Tomography, X-Ray Computed
chemical_list: D015921:Dental Implants