title: Osteotome Sinus Floor Elevation without Grafting: A 10-Year Prospective Study.
abstract: BACKGROUND
  Little is known about the long-term outcome of implants placed in the atrophic maxilla using osteotome sinus floor elevation (OSFE) without grafting.
  
  
  OBJECTIVE
  The study aims to evaluate the long-term efficiency of the procedure and stability of the peri-implant bone formed following implant placement without grafting into resorbed posterior maxilla.
  
  
  METHODS
  Twenty-five implants (≤10 mm in length) were placed in 17 patients using OSFE without grafting. The mean residual bone height was 5.4 ± 2.3 mm. Bone levels were evaluated at 1, 3, 5, and 10 years using periapical radiographs.
  
  
  RESULTS
  Fifteen patients (23 implants) participated in the 10-year examination. All implants fulfilled the survival criteria. Following surgery, the implant sites gained endo-sinus bone (mean: 3.0 ± 1.4 mm). The mean crestal bone loss (CBL) was limited to 1.0 ± 0.9 mm. The difference in mean endo-sinus bone gain and CBL was statistically significant between 1 and 10 years, but not between 3 and 5, 3 and 10, and 5 and 10 years.
  
  
  CONCLUSIONS
  At 10 years, the implant survival rate was 100%. Endo-sinus bone was mainly gained during the first year. This study demonstrates the long-term predictability of OSFE without grafting and simultaneous implant placement.
authors: Swiss Dental Clinics Group, Ardentis Clinique Dentaire, Vevey, Switzerland.
authors: Rabah
authors: R
authors: Nedir
authors: Swiss Dental Clinics Group, Ardentis Clinique Dentaire, Vevey, Switzerland.
authors: Nathalie
authors: N
authors: Nurdin
authors: Department of Orofacial Rehabilitation, Oral and Maxillofacial Radiology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
authors: Lydia
authors: L
authors: Vazquez
authors: Swiss Dental Clinics Group, Ardentis Clinique Dentaire, Geneva, Switzerland.|Department of Oral and Maxillofacial Surgery, Oral Surgery and Implantology Unit, Geneva University Hospitals, Geneva, Switzerland.
authors: Semaan
authors: S
authors: Abi Najm
authors: Swiss Dental Clinics Group, Ardentis Clinique Dentaire, Lausanne, Switzerland.
authors: Mark
authors: M
authors: Bischof
mesh_terms: D016301:Alveolar Bone Loss / Q000601:surgery; D001861:Bone Regeneration; D015921:Dental Implants; D017267:Dental Prosthesis Design; D006801:Humans; D008437:Maxilla / Q000502:physiology / Q000601:surgery; D010027:Osteotomy / Q000379:methods; D011446:Prospective Studies; D059546:Sinus Floor Augmentation / Q000379:methods*
chemical_list: D015921:Dental Implants
keywords: atrophic posterior maxilla; bone grafting; long-term study; no grafting; sinus lift; sinus osteotome