Evaluation of Gingival Health Parameters in Hybrid CAD / CAM Crowns Produced After Different Retraction Processes

Study Overview
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Brief Summary
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Clinically, the gingival retraction dentistry itself has found wide uses. It has achieved the use of subgingival and gingival crowns in fixed prostheses, cervical abrasion in restorative dentistry, management of root caries and root sensitivity, and recently in the use of appropriate measurements to improve the marginal fit of implant prostheses.There are three different retraction procedures described in the literature: mechanical, mechanical-chemical (chemically impregnated cords or matrix in injectable form) and surgery (electrosurgical, laser, cauterization, etc.)The mechanical method of retraction cords is not always suitable for patients' existing pocket depth, the necessity of using different combinations in shallow or deep pockets, the potential for limited bleeding control in chemically impregnated cords and the toxicity values in those who interact with chemical have led researchers to search for alternative methods. Especially inflammed gingiva is very sensitive to mechanical and chemical trauma. Studies have reported that gingival inflammation, pain, pocket formation, gingival withdrawal, increased bleeding and wound contamination occurred following retraction cord application. However, it is a known fact that the impression material is distorted or the accuracy of the measurement is decreased with the measurements taken without retraction. Nowadays, CAD / CAM (computer-aided design / computer-aided manufacturing) devices, which are designed to overcome these problems and eliminate the errors related to the measurement material, are the first step to be taken with a clear measure.Gingival retraction is recommended to improve the success of scanners in all restorations performed at the gingival or subgingival endpoint. Therefore, in our study, crown restorations will be produced from hybrid blocks by means of CAD / CAM device in order to evaluate the interaction of gingival health with hybrid blocks and to provide the latest technology and standardization.

Official Title
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Evaluation of Gingival Health Parameters in Hybrid CAD / CAM Crowns Produced After Different Retraction Processes

Conditions
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Periodontal Disease, Gingival Disease

Intervention / Treatment
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* Procedure: mechanical cord usage


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Being systemically healthy To indicate crown restoration in mandibular molar teeth To be vital to the preparation of the crown of the teeth Exclusion Criteria: Systemically unhealthy individuals Endodontic treatment of mandibular molar teeth Mandibular molar female individuals drawn for various reasons Pregnant women Periodontally unhealthy individuals

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 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: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Mechanical cord usage<br>Mechanical retraction | Procedure: mechanical cord usage<br>* Due to the retraction procedures, same preparation conditions will be obtained.<br>* Other names: MZ-6 laser tip used throughing;|
| Active Comparator: Chemical contained retraction usage<br>Chemical retraction | Procedure: mechanical cord usage<br>* Due to the retraction procedures, same preparation conditions will be obtained.<br>* Other names: MZ-6 laser tip used throughing;|
| Active Comparator: MZ-6 laser tip used throughing<br>Laser retraction | Procedure: mechanical cord usage<br>* Due to the retraction procedures, same preparation conditions will be obtained.<br>* Other names: MZ-6 laser tip used throughing;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Retraction methods or procedures effects on gingival health | Probing depth is one of the criteria that shows the gingival health. In each control sessions same researcher measure the probing depth as mm via a periodontal probe. | 3-12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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CAD/CAM, Gingival retraction