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Volume 14 , Issue 4
July/August 2001

Pages 321-328

Tooth-Implant Supported Fixed Prostheses: A Retrospective Multicenter Study

Tomas Lindh, LDS, Odont Dr/PhD, Simon Dahlgren, LDS, Kjell Gunnarsson, LDS, Thomas Josefsson, LDS, Hans Nilson, LDS, Peter Wilhelmsson, LDS, Johan Gunne, LDS

PMID: 11508086

Purpose: The purpose of this retrospective multicenter study on implants combined with natural teeth was to investigate the implant survival rate and loss of marginal bone, as well as indications and complications pertinent to this form of implant therapy. Materials and Methods: The study comprised 185 implants in 111 patients from six different clinics in Sweden. Gathering of data, which were taken from patient records, followed a strict protocol. The registrations included indications for treatment, failure of implants, radiographs from baseline and follow-up, and information on complications. Results: The cumulative implant survival was found to be 95.4% (standard error 4.5%) up to 3 years of follow-up. The marginal bone level at baseline was lower in the maxilla compared with the mandible (P = .015), but any further loss did not differ between the jaws. The most severe complication other than loss of osseointegration (6/185) or periimplant infections (4/183) was intrusion of the abutment teeth, which occurred in 5% of the cases. In all instances, the intrusion was seen in constructions with nonrigid forms of connection between the implants and teeth. Conclusion: The tooth-implant supported prosthesis using the Brånemark system is in the short term an equally predictable treatment as the completely implant-supported prosthesis concerning implant survival and loss of marginal bone. When combining implants and teeth, a rigid form of connection should be used to prevent tooth intrusion. Int J Prosthodont 2001;14:321-328.

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