title: Local sinus lift for single-tooth implant. I: clinical and radiographic follow-up.
abstract: BACKGROUND
  For single-tooth implant replacement in the posterior maxilla, it is often necessary to do an augmentation of the alveolar process because of post-extraction resorption and include part of the maxillary sinus.
  
  
  OBJECTIVE
  The purpose of this study is to present a technique for a local sinus lift with autogenous bone in a one-stage procedure. Additionally, volume changes of the grafted area were evaluated radiographically up to 2 years.
  
  
  METHODS
  Twenty patients, 12 female and 8 males, were included in the study. Single-tooth replacement was made in the second premolar area in 7 cases and in the molar area in 13 cases. Local sinus lift and implant installation were made simultaneously. Abutment connection was made after 6 months of healing.
  
  
  RESULTS
  Two years of clinical and radiographic follow-ups have been made in all patients. The survival rate was 100%. The residual bone volume in the actual area was 2-5 mm preoperatively, after sinus lifting in mean 13 mm, after 1 year in mean 11.4 mm, and 2 years postoperatively in mean 10.6 mm.
  
  
  CONCLUSIONS
  Local sinus lift with simultaneous bone augmentation and single-tooth replacement in the posterior maxilla is a predictable method although a certain bone volume reduction around the implant was evident at the 2-year follow-up.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Sweden. k-e_kahnberg@odontologi.gu.se
authors.forename: Karl-Erik
authors.initials: KE
authors.lastname: Kahnberg
authors.forename: Mats
authors.initials: M
authors.lastname: Wallström
authors.forename: Lars
authors.initials: L
authors.lastname: Rasmusson
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D001641:Bicuspid; D015519:Bone Density; D016025:Bone Transplantation / Q000379:methods*; D003442:Crowns; D003758:Dental Implantation, Endosseous / Q000379:methods; D019250:Dental Implants, Single-Tooth; D019094:Dental Prosthesis, Implant-Supported; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar; D009297:Nasal Mucosa / Q000502:physiology; D011859:Radiography; D059546:Sinus Floor Augmentation / Q000379:methods*; D016896:Treatment Outcome