title: Resorption of bone graft after maxillary sinus grafting and simultaneous implant placement.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the sinus bone graft resorption over 3 years after two-stage implant placement.
  
  
  METHODS
  The subjects for this study included 30 patients whose maxillary posterior ridges were too atrophic for implants. Bone-added osteotome sinus floor elevation was used in 15 maxillary sinuses, while the bone graft by lateral approach technique was used in 25 maxillary sinuses. The height from the top of the fixture to the sinus floor was estimated immediately after implant placement and the follow-up period was over 3 years. The surgery was classified with two groups: sinus bone grafting with and without autogenous bone. All implants were placed simultaneously.
  
  
  RESULTS
  The mean vertical bone loss was 3.15±2.95 mm. The survival rate of implants was 94.7%.
  
  
  CONCLUSIONS
  The amount of bone resorption was not significantly associated with the surgical methods, the type of bone graft materials used, or sinus perforation during surgery.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Young-Kyun
authors.initials: YK
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea.
authors.forename: Su-Gwan
authors.initials: SG
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Bum-Su
authors.initials: BS
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea.
authors.forename: Kyung-In
authors.initials: KI
authors.lastname: Jeong
keywords: Bone resorption; Dental implants; Sinus floor augmentation