A Clinical Trial of the Impact of Speed and Conventional Sintering on Ultra-thin, Highly Translucent, Multilayered Zirconia Laminate Restorations

Study Overview
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Brief Summary
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A Minimally invasive esthetic restorative approach with the advancement of highly translucent multilayered monolithic zirconia ceramic can provide minimal thickness that affords high strength and esthetics without the need for layering porcelain. The effect of sintering conditions on yttria-partially stabilized zirconia is essential for the long-term success of such restorations. The study aims to evaluate the clinical performance of speed and conventional sintering on ultra-thin, highly translucent, multilayered zirconia laminate restorations with minimum invasive tooth preparation.

Official Title
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Effect of Speed Sintering on Translucency and Microstructure of High Versus Low Translucent Zirconia Veneers: a Randomized Clinical Trial

Conditions
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Dental Veneers

Intervention / Treatment
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* Other: Laminate veneers with speed sintering
* Other: Laminate veneers with conventional sintering


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients able to understand and sign the informed consent form. physically and psychologically able to undergo conventional restorative procedures. Good oral hygiene with no signs of periapical pathology or periodontal disease. (periodontal screening index 0-1). Slight malposition. Teeth with spacing. Teeth with discoloration. Patient having natural teeth as opposing dentition Exclusion Criteria: Insufficient surface enamel (60%). Abutments with subgingival restorations or root caries. Parafunctional habits. Lack of opposite occluding dentition in the area intended for restoration. mandibular prognathism and maxillary retrognathism

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Conventional sintering<br> | Other: Laminate veneers with conventional sintering<br>* Zirconia specimens will be sintered using conventional sintering cycle in a conventional furnace according to the manufacturer instructions.<br>|
| Experimental: Speed sintering<br> | Other: Laminate veneers with speed sintering<br>* Zirconia specimens will be sintered using speed sintering cycle in a conventional furnace according to the manufacturer instructions.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in clinical performance | Patients will be recalled every 3 months for one year follow up. The clinical evaluation and color measurement will be based on the modified California Dental Association (CDA)/Ryge criteria of evaluation as shown Examiners will evaluate the zirconia Veneers for the following: Color match. Zirconia surface. Marginal discoloration. Marginal integrity. Clinical evaluation of the completed restorations will be performed using a double-blind assessment method | Baseline, 3 months, 6 months, 9 months, 12 months |