title: Factors affecting changes in sinus graft height between and above the placed implants.
abstract: OBJECTIVE
  The aim of this study was to compare the radiographic dimensional changes of sinus graft height above and between placed implants, and evaluate the factors effecting these changes with 2 different grafting materials and both combination.
  
  
  METHODS
  The study group comprised 42 patients (50 sinus augmentation procedures). Four consecutive panoramic radiographs were evaluated for changes in sinus graft height between and above the placed implants. Factors that may influence graft height reduction were evaluated.
  
  
  RESULTS
  The mean percentage of autogenous bone height reduction was 23% between implants and 13% above the implants. Bovine xenograft showed a mean of 6.5% graft height reduction between implants and 0% above implants. The only 2 parameters that correlated with reduction of graft height above and between the implants were time elapsed from surgery and the type of bone graft. Autogenous bone graft presented significantly more reduction (P = .022), whereas anorganic bovine bone graft had only minor or no changes in height.
  
  
  CONCLUSIONS
  The most important factor influencing reduction in vertical bone height on the time axis, following sinus augmentation is the grafting material, followed by the presence of a functional implant. Anorganic bovine bone was found superior in graft height maintenance in an up to 10 years of follow-up.
authors.affiliation: Department of Oral And Maxillofacial Surgery, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel-Aviv University, Tel-Aviv, Israel. ofer.mardinger@gmail.com
authors.forename: Ofer
authors.initials: O
authors.lastname: Mardinger
authors.forename: Gavriel
authors.initials: G
authors.lastname: Chaushu
authors.forename: Sheli
authors.initials: S
authors.lastname: Sigalov
authors.forename: Ran
authors.initials: R
authors.lastname: Herzberg
authors.forename: Binyamin
authors.initials: B
authors.lastname: Shlomi
authors.forename: Devorah
authors.initials: D
authors.lastname: Schwartz-Arad
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D000704:Analysis of Variance; D018786:Bone Substitutes; D016025:Bone Transplantation / Q000009:adverse effects*; 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; D008903:Minerals; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods*; D011859:Radiography; D018709:Statistics, Nonparametric
chemical_list: C077540:Bio-Oss; D018786:Bone Substitutes; D015921:Dental Implants; D008903:Minerals