Fracture load and mode of failure of ceramic veneers with different preparations

A clinical longitudinal study 323 porcelain laminate veneers. Period of study from 3 to 11 years

“…Retrospective studies may offer a reliable observation of the clinical behavior of the materials and techniques. On the other hand, there are numerous in vitro studies on veneers (14)(15)(16). However, such studies do not offer the same prognostic value and long-term predictability of the treatment as that of in vivo studies.…”

“…This relatively low survival rate for our functional design restorations in comparison with other studies (2,3), may be justified due to the design of the dental preparation that we used (extension of the restoration to the back side of the tooth, leaving a fine bevel). For this reason, and due to in vitro studies (14)(15)(16) Other authors (6,9) show less favorable results, likely related to incorrect cement application techniques. In the majority of the clinical studies on this type of restoration, the degree of patient satisfaction has been a factor taken into account.…”

Fracture resistance of composite veneers with different preparation designs

“…Maxillary veneers during mastication and protrusion have interincisal angle of 135 degrees and it is not parallel to the longitudinal axis of the tooth 28 . Both, the functional and parafunctional forces applied to the palatal surface move the veneer facial.…”

Current Classifications and Preparation Techniques of Dental Ceramic Laminate Veneers (Review Article).

“…Both will lead to more strength of veneer at this area in addition to easy preparation technique. They also concluded that to decrease the risk of broken thin shell of non-supported veneers ledges, the incisal bevel 0.5-1 mm will strongly achieving that purpose especially in the case of multiple numbers of ceramic laminate veneers (37). egarding the third preparation technique i.e.…”