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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 9 (1994), No. 1     1. Jan. 1994
Int J Oral Maxillofac Implants 9 (1994), No. 1  (01.01.1994)

Page 49-54

Osseointegrated Implants for Single-Tooth Replacement: Progress Report From a Multicenter Prospective Study After 3 Years
Laney, William R. / Jemt, Torsten / Harris, David / Henry, Patrick J. / Krogh, Paul H. J. / Polizzi, Giovanni / Zarb, George A. / Herrmann, lrene
After 3 years, 82 of the original 92 patients remain in this prospective multicenter study of single-tooth restorations supported by Brånemark implants. Since the l-year follow-up, 6 more patients have been lost, but no additional implants have failed in those patients examined at the 3-year follow-up visit. After 1 year of function, 97.2% of the implants survived in 88 patients, and between the 1- and 3-year follow-up, 100% survived in 82 patients, giving a 3-year cumulative success rate of 97.2%. No changes were observed in the status of gingivitis, pocket depth, periodontal pocket bleeding index, and tooth and implant mobility from those reported after 1 year. Marginal bone resorption remained at a low level-less than 0.1 mm annually during the second and third years. Abutment screw loosening continued, but at a significantly reduced rate from that reported after 1 year. When used, gold rather than titanium abutment screws remained secure.

Keywords: multicenter study, single-tooth implants