NCT04879498

Clinical Evaluation of Monolithic Zirconia FPDs

Clinical Evaluation of Monolithic Zirconia and Metal-ceramic Posterior Fixed Partial Dentures

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 90 (actual)
• Sponsor: Universidad Complutense de Madrid · Academic / Other
• Sex: All
• Age: 20 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

The objectives of the present study are to compare the survival rates and possible biological and technical complications of metal-ceramic, veneered and monolithic zirconia posterior three-unit fixed partial dentures. The null hypothesis is that no differences would be found between the parameters studied for each type of restoration.

Detailed description

Ninety patients requiring at least one 3-unit Fixed partial denture (FPD) in the posterior region of the maxilla or mandible were included in this study. All subjects were recruited from the Master in Buccofacial Prostheses and Occlusion (Faculty of Odontology, University Complutense of Madrid, Spain). Before treatment, patients were informed of the study objectives, clinical procedures, materials used, advantages and possible risks of the ceramic material, and other therapeutic alternatives. Prior to the study, participants were asked to provide written informed consent. Ninety posterior FPDs were produced and allocated in parallel and randomly to either monolithic zirconia, veneered zirconia or MC restorations. The clinical procedures were performed by two experienced clinicians. All participants received oral hygiene instructions and a professional tooth cleaning prior to prosthetic treatment. The abutment teeth were prepared with a 0.8- to 1-mm-wide circumferential chamfer, an axial reduction of 1 mm and an occlusal reduction of 1.5- to 2.0-mm. A 10- to 15- degree angle of convergence was achieved for the axial walls. Tooth preparations were scanned with an intraoral scanner and the FPDs were designed using specific software. The restorations were then cemented using a resin self-adhesive cement. After cementation, occlusal contacts were evaluated, and the adjusted surfaces were polished using a porcelain polishing kit. The 90 FPDs were examined at 1week (baseline),1, 2 and 2 years by 2 researchers who were not involved in the restorative treatment.

Conditions

• Dental Materials

Interventions

Type	Name	Description
DRUG	Monolithic zirconia	To assess the clinical performance and survival of posterior monolithic zirconia fixed partial dentures
OTHER	Veneered zirconia	To assess the clinical performance and survival of posterior veneered zirconia fixed partial dentures
OTHER	Metal-ceramic	To assess the clinical performance and survival of posterior metal-ceramic fixed partial dentures

Timeline

• Start date: 2016-01-18
• Primary completion: 2019-03-30
• Completion: 2022-12-12
• First posted: 2021-05-10
• Last updated: 2023-01-25