Clinical Results and Technical Complications of Posterior Implant‐Supported Modified Monolithic Zirconia Single Crowns and Short‐Span Fixed Dental Prostheses: A 2‐Year Pilot Study. Issue 2 (31st October 2017)

• Record Type: Journal Article
• Authors: Cheng, Chih‐Wen; Chien, Chia‐Hui; Chen, Chun‐Jung; Papaspyridakos, Panos
• Is Part Of: Journal of prosthodontics. Volume 27:Issue 2(2018)
• Page Start: 108
• Page End: 114
• Publication Date: 2017-10-31
• Subjects: Complication -- dental implant -- fixed dental prostheses -- monolithic -- zirconia; Prosthodontics -- Periodicals; Dental implants -- Periodicals; Dentistry -- Periodicals; 617.69
• DOI: 10.1111/jopr.12682
• Languages: English
• ISSNs: 1059-941X

Abstract

Abstract: Purpose: The purpose of this clinical trial was to investigate the clinical outcomes of implant‐supported modified monolithic zirconia single crowns (SCs) and short‐span fixed dental prostheses (FDPs) after a follow‐up of 2 years. Materials and Methods: Twenty‐seven patients in need of implant‐supported SCs or 3‐unit FDPs in the posterior maxilla or mandible were consecutively selected for this study. A total of 56 modified monolithic zirconia prostheses including 44 SCs (8 screw‐retained, 36 cement‐retained) and twelve 3‐unit FDPs (5 screw‐retained, 7 cement‐retained) were included in this study. All patients were followed at 6 months, 12 months, 18 months, and 2 years after placement of the modified monolithic zirconia prostheses. During the follow‐up period, all prostheses were evaluated with clinical and radiographic examinations. The following technical parameters were assessed: framework fracture, fracture of veneering porcelain, screw loosening, loss of retention because of prosthesis de‐cementation and opposing tooth fracture. Results: No implant was lost during the follow‐up period, yielding a 2‐year implant survival of 100%. One FDP failed because of framework fracture. The overall prosthesis survival rate was 98.2% after 2 years of clinical service. During the study, 5 complication events were observed in 3 SCs and one FDP, including one fracture of veneering porcelain and 2 screw loosenings in 3 SCs, and loss of retention and opposing tooth fracture in the same FDP. Therefore, the complication‐free rate of prostheses was 91.1%. Conclusion: According to the results of this study, the modified monolithic zirconia design used in this study resulted in a favorable short‐term outcome for posterior implant‐supported SCs and 3‐unit FDPs.