Screw‐retained ceramic‐veneered/monolithic zirconia partial implant‐supported fixed dental prostheses: A 5 to 10‐year retrospective study on survival and complications

Abstract

PurposeTo assess the clinical performance of screw‐retained, ceramic‐veneered, monolithic zirconia partial implant‐supported fixed dental prostheses (ISFDP) over 5–10 years and to evaluate implant‐ and prosthesis‐related factors influencing treatment failure and complications.Materials and methodsPartially edentulous patients treated with screw‐retained all‐ceramic ISFDPs with 2–4 prosthetic units with a documented follow‐up of ≥5 years after implant loading were included in this retrospective study. The outcomes analyzed included implant/prosthesis failure and biological/technical complications. Possible risk factors were identified using the mixed effects Cox regression analysis.ResultsA screened sample of 171 participants with 208 prostheses (95% of the restorations were splinted crowns without a pontic) supported by 451 dental implants were enrolled in this study. The mean follow‐up duration after prosthesis delivery was 82.4 ±17.2 months. By the end of the follow‐up period, 431 (95.57%) of the 451 implants remained functional at the implant level. At the prosthesis level, 185 (88.94%) of the 208 partial ISFDPs remained functional. Biological complications were observed in 67 implants (14.86%), and technical complications were observed in 62 ISFDPs (29.81%). Analysis revealed only emergence profiles (over‐contoured) as a significant risk factor for implant failure (P<0.001) and biological complications (P<0.001). Full‐coverage ceramic‐veneered zirconia prostheses had a significantly greater chance of chipping (P<0.001) compared with buccal‐ceramic‐veneered or monolithic zirconia prostheses.ConclusionsScrew‐retained ceramic‐veneered, monolithic partial ISFDPs have a favorable long‐term survival rate. Over‐contoured emergence profile is a significant risk factor associated with implant failure and biological complications. Buccal‐ceramic‐veneered and monolithic zirconia partial ISFDPs lower the initial prevalence of chipping compared with a full‐coverage veneered design.

Clinical evaluation and quantitative occlusal change analysis of posterior implant‐supported all‐ceramic crowns: A 3‐year randomized controlled clinical trial

“…When the fragile‐veneered area, such as the marginal ridge and cusp, are subjected to increased bite force (often occurring on the position of the first molar), chipping is more likely to occur with greater frequency and ease. Considering aesthetics and function, it is suggested that partial veneers retaining the functional occlusal area as zirconia may be a better option than conventional full‐coverage ones (Zhang et al, 2023).…”