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  • Title: Prospective study of 429 hydroxyapatite-coated cylindric omniloc implants placed in 121 patients.
    Author: McGlumphy EA, Peterson LJ, Larsen PE, Jeffcoat MK.
    Journal: Int J Oral Maxillofac Implants; 2003; 18(1):82-92. PubMed ID: 12608673.
    Abstract:
    PURPOSE: Controversy over the long-term clinical effectiveness of hydroxyapatite (HA)-coated dental implants still persists, despite numerous clinical studies documenting high survival rates. The Ohio State University College of Dentistry undertook a 5-year prospective study of 429 HA-coated cylindric implants placed into 121 patients to determine the long-term clinical performance of the implants. MATERIALS AND METHODS: All study subjects were patients screened and evaluated in the university's dental clinic by one of the principal investigators and one member of the surgical team. A total of 429 HA-coated implants were placed in 121 patients. The Ohio State University Human Subjects Committee approved and reviewed this study. RESULTS: At the time of this report, 375 implants had completed 5 years of clinical follow-up. Beyond the 5-year limit of the study, 282 implants had completed 6 years and 114 implants had completed 7 years of clinical monitoring. The cumulative survival rate was 96% at 5 years and 95% at 7 years of follow-up. Mean combined mesial/distal bone loss was 1.2 mm in the mandible and 1.4 mm in the maxilla after 5 years of functional loading. Implant failures were most commonly associated with short implants or angled abutments. DISCUSSION: Prospective clinical data are extremely valuable for clinicians evaluating the reliability of dental implant systems. In the present study, the implants achieved 100% osseointegration with minimal marginal bone loss, and 96% of the implants remained in function at 5 years. CONCLUSION: The HA-coated cylindric implants in this study provided a predictable means of oral rehabilitation.
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