Survival Rate, Load to Fracture, and Finite Element Analysis of Incisors and Canines Restored With Ceramic Veneers Having Varied Preparation Design

Clinical RelevanceFracture loads of canines and maxillary central incisors are not affected by the veneerpreparation design (eg, conservative or conventional preparation with palatal chamfer).However, conventional preparation generated higher tensile stress in the ceramic veneer.SUMMARYPurpose:To evaluate the survival rate, successrate, load to fracture, and finite element anal-ysis (FEA) of maxillary central incisors andcanines restored using ceramic veneers andvarying preparation designs.Materials and Methods:Thirty human maxil-lary central incisors and 30 canines wereallocated to the following four groups (n=15)based on the preparation design and type oftooth: Gr1 = central incisor with a conserva-tive preparation; Gr2 = central incisor with aconventional preparation with palatal cham-fer; Gr3 = canine with a conservative prepara-tion; Gr4 = canine with a conventionalpreparation with palatal chamfer. Ceramicveneers (lithium disilicate) were fabricatedand adhesively cemented (Variolink Veneer).The specimens were subjected to 4 3 10