Clinical Outcomes of Premolars Restored With Ceramic Vonlay Restorations Versus Onlay Using Modified USPHS Criteria

Study Overview
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Brief Summary
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Evaluation the clinical performance of premolars restored with ceramic vonlays versus onlays using modified USPHS criteria after follow-up period of 0,3,6,9,12 months

Detailed Description
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two groups of patients with vital premolars indicated for fixed restorations will be selected according to special inclusion criteria (n=13) in each group (total of 26). one group will receive minimally invasive cavity preparations for posterior indirect restorations either vonlay or onlay according to each group the patient will be assessed using Modified USPHS Criteria at 0,3,6,9,12 months regarding fracture, marginal integrity and marginal discoloration

Official Title
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Clinical Outcomes of Premolars Restored With Ceramic Vonlay Restorations Versus Onlay Using Modified USPHS Criteria (Randomized Clinical Trial)

Conditions
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Clinical Performance of Ceramic Vonlays

Intervention / Treatment
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* Procedure: Vonlay Ceramic restorations
* Procedure: Onlay Ceramic restorations


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age range of the patients from 25-44 years old, who could read understand and write to sign the consent by himself /herself Have no active periodontal or pulpal diseases, have teeth with good restorations.(19) Psychologically and physically able to withstand conventional dental procedures Patients with teeth problems indicated for onlay and vonlay (premolars). Decayed teeth. Teeth restored with large filling restorations. Able to return for follow-up examinations and evaluation. Exclusion Criteria: Patient less than 25 or more than 44 years. Patient with active resistant periodontal diseases. Patients with poor oral hygiene, high caries risk and uncooperative patients. Pregnant women. Patients in the growth stage with partially erupted teeth. Psychiatric problems or unrealistic expectations. Lack of opposing dentition in the area of interest. 8- The presence of a removable or fixed orthodontic appliance, signs of bruxism or clenching, the absence of more than one unit in the posterior region

Ages Eligible for Study
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Minimum Age: 25 Years
Maximum Age: 44 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

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 |
| --- | --- |
| Experimental: Vonlay lithium disilicate ceramic restorations<br>Vonlay is a hybrid of an onlay with an extended buccal veneer surface for use in bicuspid regions where there is mostly enamel to bond to. The vonlay is less invasive, more readily repairable, less technique-sensitive to attain adequate bonding, and will leave sounder tooth structure remaining if further treatment is required in the future | Procedure: Vonlay Ceramic restorations<br>* vonlay is a hybrid of an onlay with an extended buccal veneer surface for use in bicuspid regions where there is mostly enamel to bond to. The vonlay is less invasive, more readily repairable, less technique-sensitive to attain adequate bonding, and will leave sounder tooth structure remaining if further treatment is required in the future<br>* Other names: Onlay ceramic restorations with buccal veneer;|
| Active Comparator: Onlay lithium disilicate ceramic restorations<br>Onlays are used to restore large areas of decay and also used to replace old restorations, whether they are defective amalgam fillings, old cast-gold onlays, or fabricated from some other material | Procedure: Onlay Ceramic restorations<br>* Onlays are used to restore large areas of decay and also used to replace old restorations, whether they are defective amalgam fillings, old cast-gold onlays, or fabricated from some other material<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Fracture | assessed according to modified USPHS criteria (Alpha, Bravo) | change from baseline at 3,6,9,12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Marginal integrity | assessed according to modified USPHS criteria (Alpha, Bravo, Charlie and Delta) | 0,3,6,9,12 months | 
| Marginal discoloration | assessed according to modified USPHS criteria (Alpha, Bravo and Charlie) | 0,3,6,9,12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Ceramics, vonlay, onlay, fracture