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http://dx.doi.org/10.4047/jap.2015.7.4.329

Clinical outcome of double crown-retained implant overdentures with zirconia primary crowns  

Rinke, Sven (Dental Practice)
Buergers, Ralf (Department of Prosthetics, University Medical Center Gottingen)
Ziebolz, Dirk (Department of Cariology, Endodontology and Periodontology, University of Leipzig)
Roediger, Matthias (Department of Prosthetics, University Medical Center Gottingen)
Publication Information
The Journal of Advanced Prosthodontics / v.7, no.4, 2015 , pp. 329-337 More about this Journal
Abstract
PURPOSE. This retrospective study aims at the evaluation of implant-supported overdentures (IODs) supported by ceramo-galvanic double crowns (CGDCs: zirconia primary crowns + galvano-formed secondary crown). MATERIALS AND METHODS. In a private practice, 14 patients were restored with 18 IODs (mandible: 11, maxilla: 7) retained by CGDCs on 4 - 8 implants and annually evaluated for technical and/or biological failures/complications. RESULTS. One of the 86 inserted implants failed during the healing period (cumulative survival rate (CSR) implants: 98.8%). During the prosthetic functional period (mean: $5.9{\pm}2.2years$), 1 implant demonstrated an abutment fracture (CSR-abutments: 98.2%), and one case of peri-implantitis was detected. All IODs remained in function (CSR-denture: 100%). A total of 15 technical complications required interventions to maintain function (technical complication rate: 0.178 treatments/patients/year). CONCLUSION. Considering the small sample size, the use of CGDCs for the attachment of IODs is possible without an increased risk of technical complications. However, for a final evaluation, results from a larger cohort are required.
Keywords
Clinical trial; Telescopic crown; Overdenture; Zirconia; Survival; Success;
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