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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 18 (2003), No. 3     15. May 2003
Int J Oral Maxillofac Implants 18 (2003), No. 3  (15.05.2003)

Page 406-410

A Comparison of Hydroxyapatite (HA) -coated Threaded, HA-coated Cylindric, and Titanium Threaded Endosseous Dental Implants
Jeffcoat, Marjorie K. / McGlumphy, Edwin A. / Reddy, Michael S. / Geurs, Nico C. / Proskin, Howard M.
Purpose: The purpose of this study was to compare the success of hydroxyapatite (HA) -coated and machined titanium (Ti) implants in a 5-year randomized, controlled clinical trial conducted at 2 centers.
Materials and Methods: Each of 120 edentulous patients received HA-coated threaded, HAcoated cylindric, and machined Ti threaded implants in a randomized design using 5 or 6 implants. Digital radiographs allowed for yearly measurements of bone loss. Calibrated clinicians also measured mobility, Gingival Index, Plaque Index, probing depth, and recession. A Kaplan-Meier analysis was used to compare the proportion of ailing implants (defined as less than 2 mm of alveolar bone loss over 5 years) for each type of implant design. The criteria employed to assess implant outcome included the need for successful implants to lose less than 2 mm of bone support over the 5 years following placement of the prosthesis.
Results: This analysis revealed that 95.2% of machined Ti threaded implants and 97.92% of HA-coated threaded implants were successful, while 99.0% of HA-coated cylindric implants experienced less than 2 mm of bone loss (P < .06).
Discussion: All types of implants placed in this study had success rates above 95%.
Conclusion: Over 5 years, the success rate tended to favor HA-coated implants.