Clinical Evaluation of Resin Matrix Ceramic Posterior Crowns

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

90 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-01-25

Study Completion Date

2026-10-30

Brief Summary

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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.

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Detailed Description

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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

Conditions

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Dental Materials

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Resin-matrix ceramic

To assess the survival and clinical performance of resin-matrix posterior crows in a complete digital flow

Group Type EXPERIMENTAL

Resin-matrix

Intervention Type PROCEDURE

posterior crowns

Monolithic zirconia

To assess the survival and clinical performance of monolithic zirconia posterior crows in a complete digital flow

Group Type ACTIVE_COMPARATOR

Monolithic zirconia

Intervention Type PROCEDURE

posterior crowns

Metal-ceramic

To assess the survival and clinical performance of metal-ceramic posterior crows in a complete digital flow

Group Type ACTIVE_COMPARATOR

Metal-ceramic

Intervention Type PROCEDURE

posterior crowns

Interventions

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Resin-matrix

posterior crowns

Intervention Type PROCEDURE

Monolithic zirconia

posterior crowns

Intervention Type PROCEDURE

Metal-ceramic

posterior crowns

Intervention Type PROCEDURE

Other Intervention Names

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VarseoSmile crown

Eligibility Criteria

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Inclusion Criteria

* One posterior tooth (molar or premolar) to be crowned,
* Vital abutments or abutments with sufficient endodontic treatment
* Abutment not crowned previously
* Periodontally healthy abutments with no signs of bone resorption or periapical disease --
* Adequate occlusogingival height
* Stable occlusion, and the presence of natural dentition in the antagonist arch.

Exclusion Criteria

* Patients who present reduced crown length (less than 3 mm occlusogingival height
* Poor oral hygiene, high caries activity, active periodontal disease or bruxism.

Minimum Eligible Age

20 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No