Screw-retained ceramic-veneered, monolithic partial ISFDPs have long survival

A study is done to 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.

Partially 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.

Results

A 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.

Screw-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.

Reference:

Zhang, Y, Luo, J, Di, P, Chen, B, Li, J, Yu, Z, et al. Screw-retained ceramic-veneered/monolithic zirconia partial implant-supported fixed dental prostheses: A 5 to 10-year retrospective study on survival and complications. J Prosthodont. 2023; 00– 00. https://doi.org/10.1111/jopr.13723

Keywords:

Screw-retained, ceramic-veneered, monolithic, partial, ISFDPs, have, long-term, survival, Zhang, Y, Luo, J, Di, P, Chen, B, Li, J, Yu, Z, Journal of Prosthodontics