Retrospective multicenter analysis of 3i endosseous dental implants placed over a five‐year period |
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| Authors: | R Lazzara A A Siddiqui P Binon S A Feldman R Weiner R Phillips A Gonshor |
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| Institution: | Periodontist, West Palm Beach, Florida,;School of Dentistry, University of Southern California, Los Angeles,;Periodontal and Implant Regenerative Center, University of Maryland, Baltimore,;Prosthodontist, West Palm Beach, Florida,;Department of Restorative Dentistry, University of California at San Francisco,;Department of Periodontics, School of Dentistry, Temple University, Philadelphia, Pennsylvania,;Department of Oral and Maxillofacial Surgery, University of Texas at Galveston,;Oral and Maxillofacial Surgeon, Toronto, Canada |
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| Abstract: | Osseointegrated dental implants have now become an accepted form of treatment for patients with a fully or partially missing dentition. The purpose of this study was to evaluate the performance of 3i threaded and cylindrical implants. During a 5-year period, a total of 1969 3i endosseous implants were placed at 6 centers in the United States and 2 elsewhere in the edentulous and partially edentulous jaws of 653 consecutive patients ranging in age from 18 to 82 years. Of the total number of implants placed, 1341 were commercially pure titanium threaded implants and 628 were titanium plasma-sprayed implants with a cylindrical configuration. A total of 28 patients with 110 implants were lost to follow-up. Implants in these patients were considered neither a success nor a failure. Success was predicated on the osseointegration of each and every implant followed in this analysis rather than the persistence of prosthetic function. Confirmed bone anchorage was considered essential for success. A total of 625 patients with 1871 implants remain in the study with a follow-up period ranging from 6 to 60 months. A total of 93 implants (5.0% of the total implants followed) were considered as failures. A mean implant survival rate was 95.0% for both the threaded and the cylindrical implant was calculated. The success rate of threaded implants was 97.0% in the mandible and 93.8% in the maxilla. The success rate for the 3.3mm cylindrical implants was 96.0% in the mandible and 95.5% in the maxilla, and the success rate of 4.0mm diameter cylindrical implants was 95% in the mandible and 92.0% in the maxilla. Causes of failure consisted of loss of osseointegration 2.3%crestal bone loss requiring periodontal therapy after the first year of function 1.7% and mechanical problems associated with the prosthesis 0.9%. This retrospective analysis of the 3i endosseous implant system is comparable to previous reports on other implant systems in terms of implant survival and prosthesis stability. It is demonstrated that 3i implants are predictable and can provide lasting osseointegration leading to improvement of oral function if the recommended surgical and restorative protocol is followed. |
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| Keywords: | dental implantation osseointegrated multicenter trial retrospective study |
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