Clinical performance of novel-design porcelain veneers for the recovery ofcoronal volume and length

The present study evaluated the clinical performance of bonded porcelain ve neers (PV) restoring substantial coronal volume and length in the anterior dentition. Forty-eight PVs were placed in 16 patients, with systematic cove rage and reconstitution of the incisal edge, including well-defined anterio r guidance. A standardized protocol comprising diagnostic steps that integr ate additive waxups and acrylic mockups was used. PVs were fabricated using feldspathic and low-fusing porcelains in a refractory die technique. incis al overlaps featured freestanding porcelain spans ranging from 1.5 to 5.5 m m. After a mean clinical service of 4.5 years, 13 clinical parameters for e ach tooth and 4 parameters that applied to persons were recorded. Permutati on tests evaluated the effects of margin location, incisal edge span of por celain, overbite, opposing contact location, and restoration age on ceramic failure and clinical marginal adaptation and seal. At recall, 100% of the veneers were satisfactory with minor interventions. The effect of slight ma rginal defects and porcelain cracking was negligible, Biologic, periodontal , and esthetic parameters showed excellent results, which were supported by 100% patient-reported satisfaction. All patients felt comfortable with the newly defined anterior guidance. Aging was negligible, and there were no s ignificant effects of margin location (P > 0.08), incisal edge span of the ceramic, or overbite (P > 0.22) on ceramic failure and marginal performance . Minor alterations of the palatal margin, however, tended to be more frequ ent compared to facial locations, and were found especially when the opposi ng tooth contact in centric occlusion was located on the palatal margin (P = 0.028). Bonded ceramic restorations represent a reliable, effective proce dure to restore extensive coronal volume and length in the anterior dentiti on.