title: A multicenter prospective evaluation of 2-months loaded Osseotite implants placed in the posterior jaws: 3-year follow-up results.
abstract: In this prospective study, the clinical outcome of 2-months loaded implants placed in the posterior jaws was evaluated after up to 3 years of functional loading. 405 Osseotite implants with microtextured acid-etched surface were consecutively placed in 11 fully and 164 partially edentulous patients (mean age 53.5 +/- 15.3 (S.D.) years) using a one-stage technique. 282 implants, supporting 154 restorations, were placed in the mandible, while 123 implants, supporting 75 restorations, were placed in the maxilla. A total of 99 single-tooth restorations, 119 short-span fixed bridges and 11 full-arch prostheses were applied. The mean time interval from surgery to connection of provisional restoration was 2.0 +/- 0.7 months. 9 failures were reported up to 3 years of follow-up; of these, 4 mandibular and 2 maxillary implants failed during the initial healing period (before prosthesis connection), while 3 mandibular implants failed after loading. No other complications occurred throughout the study. Life table analysis showed a cumulative survival rate of 97.5% for the mandible and 98.4% for the maxilla. Post-loading implant survival rate was 98.9% for the mandible and 100% for the maxilla. The excellent outcome of this interim report suggests that microtextured Osseotite implants in the posterior jaws may safely bear a functional load applied 2 months after insertion. The results of the present study are particularly encouraging for implants placed in the maxilla, since both a significant reduction of the healing period compared to the 6 months suggested by the classical Brånemark protocol, and an excellent post-loading function may be achieved also in low quality bone.
authors.affiliation: Department of Periodontology, University of Milan, and C.E.R.I.B. (European Center for the Research in Implant dentistry and Biomaterials), Milan, Italy. ttestor@tin.it
authors.forename: Tiziano
authors.initials: T
authors.lastname: Testori
authors.forename: Massimo
authors.initials: M
authors.lastname: Del Fabbro
authors.forename: Sylvan
authors.initials: S
authors.lastname: Feldman
authors.forename: Gianpaolo
authors.initials: G
authors.lastname: Vincenzi
authors.forename: Daniel
authors.initials: D
authors.lastname: Sullivan
authors.forename: Renato
authors.initials: R
authors.lastname: Rossi
authors.forename: Eduardo
authors.initials: E
authors.lastname: Anitua
authors.forename: Francesca
authors.initials: F
authors.lastname: Bianchi
authors.forename: Luca
authors.initials: L
authors.lastname: Francetti
authors.forename: Roberto L
authors.initials: RL
authors.lastname: Weinstein
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015921:Dental Implants; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003824:Denture, Complete; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation / Q000601:surgery; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery; D015993:Life Tables; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D011446:Prospective Studies; D013314:Stress, Mechanical; D013499:Surface Properties; D015996:Survival Rate; D016896:Treatment Outcome; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants