Clinical Evaluation of Fracture Resistance and Color Changes of All Ceramic Laminate Veneers Prepared With Modified Gull Wing Versus Conventional Technique

This trial will be conducted on patient from the outpatient clinic in the fixed prosthodontics clinic, faculty of oral and dental medicine, Cairo University Adherence session will take place in the presence of the patients in the initial visit. This include that patient will be informed by Z Elshamy about the study steps and maintenance of oral hygiene instructions. Participants will be asked by Z Elshamy if they have any problems.

Motivation and enforcing the maintenance of oral hygiene measures by ZElshamy.

The visits will be designated as follow:

Visit 1: Preoperative records, face-to-face adherence reminder session, clinical, radiographic examination, intraoral photographs, and primary impression for diagnostic cast construction. Visit 2: teeth preparation, secondary impression using addition silicone rubber base material and temporary restoration. Visit 3: one week after the second visit, try in for the restoration will be done.

Visit 4: placement and permanent cementation of the final restoration. Visit 5: Every 2 months post operatively follow-up visit for one year. Sample size: Since no previously published effect size data regarding the effectiveness of neither the intervention nor the control exist, an estimated sample of (20 restorations) would be used with allocation ratio 1:1 Recruitment: The patients fulfilled the inclusion criteria will be selected from the outpatient clinic of the fixed prosthodontics department - Cairo University. Screening of patients will be carried out until the target population is reached.