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3-year prospective multicenter study on one-stage implant surgery and early loading in the edentulous mandible.

Journal article
Authors Gerry M Raghoebar
Bertil Friberg
Ingrid Grunert
John A Hobkirk
Gabor Tepper
Inger Wendelhag
Published in Clinical implant dentistry and related research
Volume 5
Issue 1
Pages 39-46
ISSN 1523-0899
Publication year 2003
Published at Institute of Odontology
Pages 39-46
Language en
Links www.ncbi.nlm.nih.gov/entrez/query.f...
Keywords Adult, Aged, Alveolar Bone Loss, etiology, Chi-Square Distribution, Dental Implantation, Endosseous, methods, Dental Implants, adverse effects, Dental Plaque, etiology, Dental Prosthesis Retention, Dental Prosthesis, Implant-Supported, Dental Restoration Failure, Denture, Overlay, Denture, Partial, Fixed, Denture, Partial, Immediate, Female, Humans, Jaw, Edentulous, rehabilitation, Life Tables, Male, Mandible, Middle Aged, Odds Ratio, Osseointegration, Periodontal Index, Prospective Studies, Statistics, Nonparametric
Subject categories Surgical research

Abstract

BACKGROUND: The long-term success rates achieved in dental implantology suggest that flexibility might well exist within the various implant systems to a degree that an altered protocol (ie, one-stage surgery and immediate or early loading) can be performed under controlled conditions. However, before variations of the protocol can be considered for general use, they must be subjected to critical analysis, particularly with respect to the predictability of osseointegration, alteration of soft tissue barrier, and relative change in bone height around the implants. PURPOSE: The aim of this prospective multicenter study was to evaluate implant survival and periimplant conditions around endosseous implants placed in a one-stage surgical procedure and early loading. MATERIALS AND METHODS: A total of 170 implants were placed in 40 patients with mandibular edentulism and were functionally loaded within 6 weeks with overdentures (n = 30) or fixed prostheses (n = 10). All patients and prosthetic constructions were evaluated according to a standardized protocol during 3 years of follow-up. Cumulative implant survival rates were calculated, and implant loss in relation to implant size and bone quality and quantity were evaluated. Furthermore, the protocol included assessment of clinical (plaque and bleeding scores, prosthesis stability) and radiographic parameters. RESULTS: Over a period of 3 years, the implant survival rate was 93% for both implants and prostheses (fixed or removable). No implants were lost after the first year of loading. The periimplant tissues were in a healthy condition. Mean marginal bone resorption from the time of loading to the 3-year follow-up was 0.41 mm (SD 0.52). CONCLUSIONS: From this study it may be concluded that early loading results in good implant survival and proper periimplant health in edentulous mandibles.

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