Applicability of osseointegrated oral implants in the rehabilitation of partial edentulism: a prospective multicenter study on 558 fixtures.

TLDR

Nine centers enrolled 159 partially edentulous adults (18–70 y) in a prospective study using the Brånemark System, assessing plaque, gingivitis, pocket depth, bleeding, tooth mobility, and stomatognathic function. Of 558 implants placed, 521 survived to prosthesis placement; failures (19 nonintegration, 11 withdrawals, 6 prosthodontic, 1 procedural) were mainly linked to poor bone quality, male sex, and smaller implant size, and early results indicate a success rate comparable to or exceeding that of fully edentulous patients.

Abstract

Nine clinical centers using the Brånemark System participated in a prospective study of 159 partially edentulous patients between 18 and 70 years of age. Clinical parameters evaluated were plaque index, gingivitis, pocket depth, bleeding index, tooth mobility, and stomatognathic function. Initially, 558 fixtures were placed and 521 remained in the study following prosthesis placement (199 prostheses in 154 patients). Fixtures were lost or unaccounted for because of nonintegration prior to prosthesis fabrication (19), patient withdrawal (11), prosthodontic reasons (6), and failure during prosthetic procedures (1). Failure was primarily attributable to unfavorable bone quality, sex (more in males), and smaller fixture size. Complications and failure related to other patient characteristics are presented. After 1 year of a 5-year study, preliminary results suggest that a success rate equal to or better than that obtained with edentulous patients may be expected.