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A Retrospective Evaluation of Treatments with Implant‐Supported Maxillary Overdentures
Author(s) -
Widbom Christin,
Söderfeldt Björn,
Kronström Mats
Publication year - 2005
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/j.1708-8208.2005.tb00061.x
Subject(s) - medicine , implant , dentistry , maxilla , prosthesis , dental prosthesis , implant failure , orthodontics , surgery
Background: Considerably lower success rates have been presented for implant‐supported overdentures in the maxilla compared with the mandible. Purpose: The aim of the study was to report the outcome of implant‐supported maxillary overdentures from one clinic. Methods: All patients treated with implant‐supported maxillary overdentures in the Department of Prosthetic Dentistry, Central Hospital, Skövde, Sweden, between 1993 and 2002 were identified from patient charts and included in the study. All patients had a rigid cast gold alloy bar designed with ball attachments retaining an overdenture. Results: Twenty‐seven subjects were included, of whom 13 were originally planned for overdenture treatment (group 1) and the other 14 for a fixed prosthesis (group 2). The mean observation period was 5.7 years for subjects in group 1 and 5.5 years for those in group 2. One hundred forty‐five implants were placed, and the majority of the failures were diagnosed as early ones and were found in group 2. The cumulative implant survival rate after 5 years was 77% in group 1 and 46% in group 2. The probability of having implant failure was almost three times higher among subjects in group 2 compared with subjects in group 1. Most technical and biologic complications were related to the retention system. Conclusion: Maxillary implant‐supported overdentures show a high implant failure rate, but fewer implant failures occurred for patients originally planned for overdenture treatment.