Shade Matching of Universal Versus Conventional Nanohybrid Resin Composites in Class IV Restorations After Bleaching

Study Overview
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Brief Summary
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The aim of the current study is to assess the shade matching potential of single shade universal resin composite versus conventional nanohybrid resin composite in class IV restorations after bleaching

Detailed Description
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The use of a dental material that can blend into the surrounding tooth structure is increasing in popularity . A new technology , smart chromatic technology , has been introduced as the shade matching composite called omnichroma . Omnichroma has the ability to match the new lighter shade of the bleached teeth unlike the conventional composite . In this study , an investigation will be done to evaluate if this new technology will help to preserve the tooth structure and be more conservative , by avoiding the removal of the old anterior restorations after bleaching

Official Title
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Clinical Evaluation of Shade Matching and Marginal Discoloration of One Shade Universal Resin Composite Versus Conventional Nanohybrid Resin Composite in Class IV Restorations Before and After Tooth Bleaching .

Conditions
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Anterior Teeth

Intervention / Treatment
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* Other: One shade universal composite
* Other: Nanohybrid resin composite


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Candidates must have one or more existing class IV restoration. Cases indicated for bleaching. Cooperative patient approving to participate in the trial. Exclusion Criteria: Patients with severe medical conditions that might interfere with the study. Patients with rampant caries or xerostomia. Smoking. Patients with history of hydrogen peroxide sensitivity , periodontal inflammation. Lack of compliance. Tempromandibular joint disorders. Disabilities.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 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 |
| --- | --- |
| Experimental: One shade universal composite<br>shade matching composite | Other: One shade universal composite<br>* A resin composite with new smart chromatic technology and chameleon effect. It has the ability to match the new lighter shade of the bleached teeth unlike the conventional composite<br>|
| Active Comparator: Nanohybrid resin composite<br>Conventional Nanohybrid resin composite | Other: Nanohybrid resin composite<br>* A conventional resin composite with multiple shades<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in shade matching | Modified USPHS criteria with Alpha, Bravo ,Charlie and Delta scores (Categorical) | Baseline, 2 days, 3, 6 and 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Marginal discoloration | Modified USPHS criteria with Alpha, Bravo, Charlie and Delta scores (Categorical) | Baseline, 2 days, 3, 6 and 12 months | 
| Change in surface texture | Modified USPHS criteria with Alpha, Bravo, Charlie and Delta scores (Categorical) | Baseline, 2 days, 3, 6 and 12 months |