title: Long-term results after lateral and osteotome technique sinus floor elevation: a retrospective analysis of 2190 implants over a time period of 15 years.
abstract: BACKGROUND
  During a time period of 15 years (1992-2007), 2190 implants were inserted in 983 patients after sinus floor elevation.
  
  
  METHODS
  One thousand two hundred and seven implants (461 patients) were placed into sites, in which the sinus was augmented using the lateral approach (LSFE), and 983 implants (522 patients) in sites augmented with the osteotome technique. Bovine bone mineral (n=1217), beta-tricalcium phosphate (n=126), and in some cases, only autogenous bone were used for augmentation in the LSFE. Generally, bone chips that were collected during the preparation of the osteotomy were added to the bone substitutes. No additional augmentation materials were used for augmentation with the osteotome technique. A retrospective analysis of the treatment results was assessed by patients documentations that were recorded in the impDAT(R) - Program and by the evaluation of pre-, and post-surgical orthopantomograms.
  
  
  RESULTS
  The implant survival analysis according to Kaplan-Meier showed 97.1% after 176 months of loading for both sinus floor elevation techniques.
  
  
  CONCLUSIONS
  The evaluation with respect to the augmentation material used did not reveal significant differences in the implant survival rate and in both cases remodelling processes could be observed in the augmented area.
authors.affiliation: ptetsch@t-online.de
authors.forename: Jan
authors.initials: J
authors.lastname: Tetsch
authors.forename: Peter
authors.initials: P
authors.lastname: Tetsch
authors.forename: Dominikus A
authors.initials: DA
authors.lastname: Lysek
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D007431:Intraoperative Complications; D008137:Longitudinal Studies; D008297:Male; D008437:Maxilla / Q000601:surgery*; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D012044:Regression Analysis; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants