Survival of Hybrid Laminate Veneers Using Two Different Tooth Preparation Techniques:Randomized Clinical Trial

Inclusion Criteria: * Patient-related criteria: * Patients consulting the outpatient clinic of the department of Fixed Prosthodontics, Faculty of Dentistry, Cairo University. * Able to tolerate necessary restorative procedures. * Provide written consent. * Accepts the one year follow-up period. Tooth related criteria: * Malaligned and malformed teeth in the aesthetics zone * Multiple spacing * Diastema * Slightly and moderately discolored teeth * Good oral hygiene Exclusion Criteria: Patient-related criteria: * Medically compromised patients, as they would not be able to attend multiple appointments or might require special management. * Uncooperative patients, who would not abide by the instructions or attend the appointments. Tooth related criteria: * Deciduous teeth; as the study was targeting only permanent teeth. * Teeth with previous restorations, which might add another variable to the study (type of old restorative material, extent of recurrent caries). This could also affect the bond of laminate veneers to tooth structure. * Patients with parafunctional habits, large restorations, or excessive tooth wear. * Initially, scaling and polishing was performed. Patients were instructed on improving their oral hygiene and maintaining effective plaque control. However, if their gingival health did not improve, they were excluded from the study.