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Volume 9 , Issue 1
January/February 1994

Pages 49-54


Osseointegrated Implants for Single-Tooth Replacement: Progress Report From a Multicenter Prospective Study After 3 Years

William R. Laney, DMD, MS/Torsten Jemt, DDS, PhD/David Harris, FDS RCS, FICD, LRCP, MRCS/Patrick J. Henry, BDSc, MSD/Paul H.J. Krogh, DDS, MSD/ Giovanni Polizzi, MS, DDS/George A. Zarb, BChD, DDS, MS, MS, FRCDC/lrene Herrmann, DDS


PMID: 8150512

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. (INT J ORAL MAXILLOFAC IMPLANTS 1994;9:49—54.)

Key words: multicenter study, single-tooth implants


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