Clinical Outcome of Implants Following Initial Implant Failure

Clinical Outcome of Implants Following Initial Implant Failure
Friday, 12 March 2004
P.S. ROSEN, and M.A. REYNOLDS, University of Maryland Dental School, Baltimore, USA
IADR
Dental implants have expanded the treatment planning options available to clinicians. While multiple clinical trials substantiate the overall high success rate of implants, few studies have evaluated the survival rate of implants placed in sites following an implant failure. Objective: The purpose of this retrospective study was to examine the 1-2 year clinical outcome of implants placed at sites of a previously failed implant. Methods: A total of 562 implants were consecutively placed in 311 patients (146 male, 165 female; age range 20-86 years) over a four-year period. The distribution and number of initial implant fixtures placed were as follows: maxilla (264), mandible (298), anterior (165), and posterior (397). Clinically integrated implants at second stage surgery subsequently underwent prosthetic restoration. Results: A total of 28 implants failed in 27 patients, representing an overall success rate of 95%. Of the failed implant sites, 8 were associated with a tooth that had received endodontic care and 5 were classified as having had poor bone quality (Type IV). Sixteen of these patients had 17 sites retreated with a second implant having a dual acid-etched surface. Fifteen of the 17 implants clinically integrated and were restored, for a success rate of 88%. All 15 restored implants have remained in function for a minimum of 1-2 years. Conclusion: The results from this retrospective analysis suggest that implants can achieve clinical integration in sites of previously failed implants.