Clinical Evaluation of Resin Matrix Ceramic and Zirconia Posterior Crowns

What this Trial Is About

Researchers are conducting a randomized clinical study to compare the survival and success rates, potential biological and technical complications, and overall clinical performance of three types of posterior crowns: metal-ceramic, monolithic zirconia, and resin-matrix ceramic. The study aims to determine if there are any differences among these restorations when used in the back teeth, with a null hypothesis that no differences will be found. This investigation is led by Universidad Complutense de Madrid and focuses on dental materials used for crown restorations. The study will include 60 patients needing a single crown on a molar or premolar in either the upper or lower jaw. Ninety crowns will be made and randomly assigned to one of the three types: resin-matrix ceramic, monolithic zirconia, or metal-ceramic. Treatments will be done by three experienced prosthodontists using standardized tooth preparation methods and full-arch digital impressions taken with an intraoral scanner. Crowns will be cemented with resin cement and all procedures will follow a complete digital workflow. Participants will be monitored at baseline (one week after treatment) and then at 1, 2, and 3 years. Evaluations will include the quality of the restorations, plaque and gingival indices, probing depth, margin stability, and patient satisfaction. Two independent researchers will perform these assessments. The primary outcome is the survival and success rates of the crowns after three years. This study will provide detailed long-term data on the clinical performance of these different crown materials.

Clinical Evaluation of Resin Matrix Ceramic Posterior Crowns