Evaluation of Marginal, Internal Adaptation and Clinical Performance of Endo-crowns Fabricated From Nano Hybrid and Lithium Di-silicate Ceramic Materials.

Study Overview
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Brief Summary
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Evaluation of the marginal and internal adaptation using silicon replica technique, which will be measured by digital microscope and clinical Performance using modified USPHS scoring system of Endo-crowns fabricated from Nano-ceramic Hybrid and Lithium di-silicate ceramic materials.

Detailed Description
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Evaluation of the marginal and internal adaptation using silicon replica technique, which will be measured by digital microscope and clinical Performance using modified USPHS scoring system of Endo-crowns fabricated from Nano-ceramic Hybrid and Lithium di-silicate ceramic materials. Primary outcome: Marginal gap of the two groups will be measured using Silicon replica technique, Each replica will be sectioned bucco-lingually and mesio-distally into four segments named (MB, DB, ML, DL) and each segment has five reference points assigned at different positions, An overall of twenty reference points will be measured in each replica sample using a digital microscope. Secondary outcome: Internal gap of the two groups will be measured using Silicon replica technique, which will be measured by digital microscope. Clinical Performance of the two groups will be evaluated using modified USPHS scoring system. (Color match, Marginal discoloration, Surface texture and Gross fracture)

Official Title
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Evaluation of Marginal and Internal Adaptation and Clinical Performance of Endo-crowns Fabricated From Nano-ceramic Hybrid and Lithium Di-silicate Ceramic Materials (A Randomized Controlled Clinical Trial)

Conditions
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Clinical Fit and Clinical Performance

Intervention / Treatment
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* Procedure: Nano-ceramic hybrid (Grandio Blocs) Endo-crown


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: From 18-50 years old, be able to read and sign the informed consent document. Have no active periodontal or pulpal diseases, have teeth with good restorations. Psychologically and physically able to withstand conventional dental procedures. Patients planned for a single coverage restoration in the posterior area. Able to return for follow-up examinations and evaluation. Patients have root apex of molar without evident damage and no root fracture. Good oral hygiene habits. Have a complete root canal therapy molar necessitating an Endo-crown restoration. Exclusion Criteria: Patient less than 18 or more than 50 years Patients with severe clenching or bruxism. Patient with active resistant periodontal diseases Patients with poor oral hygiene and uncooperative patients Pregnant women Patients in the growth stage with partially erupted teeth Psychiatric problems or unrealistic expectations Patients with inadequate or low quality endodontic treatment.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 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 |
| --- | --- |
| Other: Nano-ceramic hybrid (Grandio Blocs) Endo-crown.<br>Nano-ceramic hybrid ( intervention) | Procedure: Nano-ceramic hybrid (Grandio Blocs) Endo-crown<br>* Nano-ceramic hybrid<br>|
| Active Comparator: Lithium di-silicate Ceramic (E.max CAD blocks) Endo-crown<br>Lithium di-silicate Ceramic ( Control) | Procedure: Nano-ceramic hybrid (Grandio Blocs) Endo-crown<br>* Nano-ceramic hybrid<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Marginal and internal gap evaluation | marginal and internal gap will be evaluated by silicon replica technique, each replica will be sectioned into four segments named (MB, DB, ML, DL) and each segment had five reference points assigned at different positions, an overall of twenty reference points will be measured in each replica sample using a digital microscope. The measuring unit by microns | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| clinical performance(Color match, Marginal discoloration, Surface texture and Gross fracture) | Clinical performance will be measured by modified USPHS criteria and the measuring unit by Alpha (A), Bravo (B) and Charlie (C) | 1 year |