title: Three-Year Analysis of Fixed and Removable Telescopic Attachment-Retained Implant-Supported Dental Prostheses: Survival and Need for Maintenance.
abstract: OBJECTIVE
  The purpose of this retrospective clinical study was to evaluate the clinical outcomes of fixed implant-supported dental prostheses (FISDPs) and removable ISDPs (RISDPs) retained by telescopic attachments, the factors influencing survival, and the type and number of maintenance treatments required during the observation period.
  
  
  METHODS
  This retrospective clinical study is based on patients who were provided with ISDPs between 2004 and 2010. Patient sex, type of prosthesis, location, opposing dentition, and the effect of continuous follow-up on the probability of a favorable outcome, as well as the number of maintenance treatments, were analyzed. A statistical analysis was performed using the Kaplan-Meier method.
  
  
  RESULTS
  A sample of 233 patients with 157 FISDPs and 76 RISDPs supported by a total of 567 implants was randomized and included in the analysis. The mean observation period was 15.9 ± 15.4 months (maximum, 66.0 months). During the observation period, 3.9% of prostheses (7/157 FISDPs and 2/76 RISDPs) ceased to function and 2.3% of implants (13 implants) were lost. The mean survival time was 59.7 ± 2.3 months, with a survival probability of 90.2% after 3 years. Prostheses in the mandible showed significantly higher survival rates than those in the maxilla. Maintenance treatments had to be performed at an earlier stage for patients with RISDPs than for patients with FISDPs. In patients with a conventional removable prosthesis in the opposing arch, the time until maintenance was needed was significantly shorter.
  
  
  CONCLUSIONS
  Within the limitations of a retrospective study, it can be concluded that the FISDPs and RISDPs show equally good survival rates after 3 years in function. RISDPs showed a greater and earlier need for maintenance treatments during the first years in function.
authors.forename: Peter
authors.initials: P
authors.lastname: Rehmann
authors.forename: Karina
authors.initials: K
authors.lastname: Rudel
authors.forename: Anke
authors.initials: A
authors.lastname: Podhorsky
authors.forename: Bernd
authors.initials: B
authors.lastname: Wöstmann
mesh_terms: D000328:Adult; D003442:Crowns / Q000706:statistics & numerical data; D015921:Dental Implants / Q000706:statistics & numerical data; D019094:Dental Prosthesis, Implant-Supported / Q000706:statistics & numerical data*; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003779:Denture Design / Q000706:statistics & numerical data; D003823:Denture Rebasing / Q000706:statistics & numerical data; D003780:Denture Repair / Q000706:statistics & numerical data; D003828:Denture, Overlay / Q000706:statistics & numerical data*; D003830:Denture, Partial, Fixed / Q000706:statistics & numerical data*; D003832:Denture, Partial, Removable / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008875:Middle Aged; D011897:Random Allocation; D012189:Retrospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants