Comparison in Marginal Adaptation Between Conventional and Gull Wing Preparation in Laminates Veneers

Not Applicable

• Conditions: Teeth Sensitivity
• Interventions: Procedure: gull wing preparation of laminates veneers; Procedure: conventional preparation of laminates veneers

• Registration Number: NCT03214549
• Lead Sponsor: Cairo University

Brief Summary

The aim of this study is to evaluate tooth sensitivity and marginal adaptation of porcelain laminates veneers prepared with modified gull wing preparation and conventional preparation.

Detailed Description

Visit 1: Preoperative records, face-to-face adherence reminder session, clinical, radio-graphic examination and primary impression for diagnostic cast construction.

Visit 2: Teeth preparation, secondary impression,temporary restoration and teeth sensitivity evaluation using United States Public Health Service criteria.

Visit 3: Placement and permanent cementation of the final restoration

Visit 4: marginal adaptation measurement by electron microscope using impression replica.

Study Timeline

• Status Verified: 2017-07
• Study First Submitted: 2017-07-03
• Study First Submitted QC: 2017-07-09
• Last Update Submitted: 2017-07-09
• Study First Posted: 2017-07-11
• Last Update Posted: 2017-07-11
• Study Start: 2018-07-13
• Primary Completion: 2018-10-01
• Study Completion: 2018-10-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 38

Inclusion Criteria

• From 18-40 years old, be able to read and sign the informed consent document.
• Be physically and psychologically able to tolerate conventional restorative Procedures.
• Have no active periodontal or pulpal diseases, have teeth with good restorations.
• Patients with teeth problems indicated for laminate veneer (e.g:discoloration, fracture not involve more than 50% enamel loss, mild malposition.
• Be willing to return for follow-up examinations and evaluation.

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Exclusion Criteria

• Patients in the growth stage with partially erupted teeth.
• Patient with fractured teeth of more than 50% enamel loss.
• Patients with poor oral hygiene and motivation.
• Pregnant women.
• Patient with post and core endodontically treated teeth.
• Psychiatric problems or unrealistic expectations.
• Lack of opposite occluding dentition in the area intended for restoration

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
gull wing preparation veneers	gull wing preparation of laminates veneers	intervention: gull wing preparation in laminates veneers proximal margin of the preparation is placed toward the lingual .The area of the proximal margin between the contact area and the gingival papilla is placed even further to the lingual. This preparation design helps to hide the margin when the restorations are viewed from an angle.
conventional preparation veneers	conventional preparation of laminates veneers	intervention: conventional preparation in laminates veneers preparation of veneers without lingual extension of preparation in mesial and distal areas

Primary Outcome Measures

Name	Time	Method
measuring marginal adaptation of laminates veneers using stero-microscope	immediately before laminates delivery up to 4 week sfter tooth preparation	marginal adaptation of laminates veneers will be assess as follows, before laminates cementation, an impression material will be placed in the fitting surface of the veneers and placed over the reduced tooth using finger pressure, after material set the impression replica is separated from the laminates and the replica is section and measures under stero-microscope for marginal adaptation, measurement will be performed in eight different points on the buccal and mesio-distal sections, measurement will be in micrometer.

Secondary Outcome Measures

Name	Time	Method
measuring tooth sensitivity after tooth preparation for laminates veneers	one week after tooth preparation	measurment will be acording tomodified United States Public Health Service (USPHS) criteria used for the clinical evaluations of the restorations. post-operative sensitivity 0 No symptoms; 1. Slight sensitivity; 2. Moderate sensitivity; 3. Severe pain