Technical and Biological Complications of Screw-Retained (CAD/CAM) Monolithic and Partial Veneer Zirconia for Fixed Dental Prostheses on Posterior Implants Using a Digital Workflow: A 3-Year Cross-Sectional Retrospective Study

Abstract

Objective. The introduction of CAD/CAM and the development of zirconia-based restorations have allowed clinicians to use less expensive materials and faster manufacturing procedures. The purpose of the study was to analyze the differences, in terms of mechanical and biological complication, in multiunit zirconia fixed dental prosthesis (FPDs) on posterior implants produced using a digital workflow. Method and Materials. This study was a retrospective investigation, and patients treated with screw-retained monolithic or partial veneer FPDs on dental implants were selected. Periapical radiographs were taken at baseline and at the 3-year follow-up. Complications were recorded and classified as technical and biological ones. Results. The study population included 25 patients. The occlusal and interproximal corrections were not clinically significant. In the study sample, the survival rate and success rate of the FPDs after 3 years were 100% and 96%, respectively. One implant failed immediately after placement. Conclusion. Monolithic zirconia FPDs and partial veneer FPDs showed a 100% survival rate, presenting an interesting alternative to metal ceramic restorations. The partial veneer FPDs had a higher technical complication rate than the monolithic FPDs; however, no statistically significant difference was found.

The Application of Angulated Screw-Channels in Metal-Free, Implant-Supported Restorations: A Retrospective Survival Analysis

“…The present study reported on the success rate of screw-retained FPD employing ASC. At the 2 years follow-up, a success rate of 94% was observed; this is in line with what other studies reported on FPD not employing ASC [26][27][28], hinting that this retentive system does not reduce the efficacy of these kind of restorations.…”

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

“…17 Another similar study of screw-retained monolithic and partial veneer zirconia ISFDPs reported a 100% survival rate and a 96% success rate (at the prosthesis level), with a small sample (14 monolithic and 11 veneered prostheses), and a shorter observation period (3 years). 18 The current study assessed the emergence profiles via radiographs and reported that an over-contoured proximal profile was strongly associated with implant loss (HR: 7.132; 95% CI: 1.638-31.062; P < 0.001) and biological complications (HR: 8.833; 95% CI: 2.324-33.577; P < 0.001). This is consistent with previous studies, wherein peri-implant complications were more likely associated with over-contoured prostheses.…”

“…The survival rate of PFM ISFDP after 5 years was 96.4%, and after 10 years was 93.9%. 3,16 Recent studies have reported excellent short-term (<5 years) survival rates of monolithic zirconia ISFDP; 17,18 however, clinical evidence on the medium-(>5 years) and long-term survival of screw-retained monolithic zirconia ISFDP is still lacking. 19 Consequently, this retrospective study aimed to evaluate the clinical outcomes of screw-retained, ceramicveneered/monolithic zirconia ISFDPs in partially edentulous patients over 5-10 years.…”

Clinical outcomes of implant‐supported monolithic zirconia crowns and fixed partial dentures: A systematic review

“…Of these, 3 were designed as randomized controlled trials, 5 were prospective studies, and 6 were retrospective studies. All 14 studies included in this study reported on implant‐supported monolithic zirconia restorations 6–19 . The inter‐reviewer reliability was evaluated at the title and abstract review stage, and Cohen's kappa value was found to be 0.850 at the title stage and 0.798 at the abstract stage, indicating substantial agreement.…”

“…All 14 studies included in this study reported on implant-supported monolithic zirconia restorations. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] The inter-reviewer reliability was evaluated at the title and abstract review stage, and Cohen's kappa value was found to be 0.850 at the title stage and 0.798 at the abstract stage, indicating substantial agreement. The specific manufacturers and products of monolithic zirconia used in restorations differed between studies.…”