Clinical Evaluation of Resin Matrix Ceramic Posterior Crowns

Dental Materials Clinical Trial

Official title: Clinical Evaluation of Resin Matrix Ceramic and Zirconia Posterior Crowns

Status Recruiting

Clinical Trial Summary

The objectives of the present prospective randomized clinical study are to evaluate and to compare the survival and success rates, possible biological and technical complications, and the clinical performance of metal-ceramic, monolithic zirconia and resin-matrix posterior crowns. The null hypothesis is that no differences would be found between the parameters studied for each type of restoration.

Clinical Trial Description

A total of 60 patients, in whom the placement of a crown in the posterior region of the maxilla or mandible was indicated, will be included in the study. The patients will be recruited from the Master of Buccofacial Prostheses and Occlusion (School of Dentistry; University Complutense of Madrid). Prior to treatment, patients will be informed regarding the aims of the study, the clinical procedure, the materials used, the risks and benefits of ceramic restorations and the alternatives to the proposed treatment. All the patients will be provided with a written informed consent for the inclusion in this study, Ninety posterior crowns will be produced and assigned in parallel and randomly to either resin-matrix ceramic, zirconia or metal-ceramic restorations. Three experienced prosthodontists will treat the patients. Abutment preparation will be performed in a standardized manner: circumferentially chamfer (1 mm in width), axial reduction of 1 mm, and an occlusal reduction of 1.5 to 2 mm. The tapering angle between the axial walls will be approximately 10- to 12- degrees. Full-arch digital impressions will be taken using an Intraoral Scanner. The restorations will be cemented with a resin cement. The restorations will be examined at one week (baseline), 1, 2, and 3 years, by two researchers who were not involved in the restorative treatment ;

Related Conditions & MeSH terms

• Dental Materials

• NCT number: NCT05707780
• Study type: Interventional
• Source: Universidad Complutense de Madrid
• Contact: MARIA JESUS SUAREZ, PhD
• Phone: 0034 913942029
• Email: mjsuarez@ucm.es
• Status: Recruiting
• Phase: N/A
• Start date: January 25, 2023
• Completion date: October 30, 2026