title: Osseointegrated implants for single-tooth replacement: progress report from a multicenter prospective study after 3 years.
abstract: 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 1-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.
authors.affiliation: Department of Dentistry, Mayo Clinic-Mayo Medical School, Rochester, Minnesota.
authors.forename: W R
authors.initials: WR
authors.lastname: Laney
authors.forename: T
authors.initials: T
authors.lastname: Jemt
authors.forename: D
authors.initials: D
authors.lastname: Harris
authors.forename: P J
authors.initials: PJ
authors.lastname: Henry
authors.forename: P H
authors.initials: PH
authors.lastname: Krogh
authors.forename: G
authors.initials: G
authors.lastname: Polizzi
authors.forename: G A
authors.initials: GA
authors.lastname: Zarb
authors.forename: I
authors.initials: I
authors.lastname: Herrmann
mesh_terms: D000328:Adult; D000368:Aged; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000706:statistics & numerical data; D015921:Dental Implants; D017268:Dental Prosthesis Retention; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011475:Prosthesis Failure; D014093:Tooth, Artificial; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants