title: A retrospective study of the effects of sinus membrane elevation on bone formation around implants placed in the maxillary sinus cavity.
abstract: OBJECTIVE
  The aim of this study was to investigate the height of new bone formation in the maxillary sinus after implants were inserted into the maxillary sinus without any additional grafting material after sinus membrane elevation.
  
  
  METHODS
  Nine patients with a combined total of 10 implants that were inserted into the maxillary sinus more than 4 mm (range, 4-6 mm) after sinus membrane elevation were evaluated for endosinus bone gain and crestal peri-implant bone loss 4 months after implantation using computerized tomography and dental radiographs.
  
  
  RESULTS
  The mean endosinus bone gain was 3.5 +/- 0.6 mm. The mean crestal peri-implant bone loss was 0.1 +/- 0.1 mm.
  
  
  CONCLUSIONS
  The results indicated that elevation of the sinus membrane without the addition of a bone-grafting material led to bone formation in the sinus.
authors.affiliation: Department of Dentistry, Wonju College of Medicine, Yonsei University, Wonju, South Korea.
authors.forename: Seung-Mi
authors.initials: SM
authors.lastname: Jeong
authors.forename: Byung-Ho
authors.initials: BH
authors.lastname: Choi
authors.forename: Jingxu
authors.initials: J
authors.lastname: Li
authors.forename: Feng
authors.initials: F
authors.lastname: Xuan
mesh_terms: D000368:Aged; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D009297:Nasal Mucosa / Q000502:physiology; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods*; D016348:Osseointegration; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
chemical_list: D015921:Dental Implants