Porcelain laminates with and without dental preparation. One biomimetic vision by the finite elements analysis.

Abstract

The present work had the objective to evaluate the distribution of tensions in teeth restored with porcelain laminates by the finites elements analisys, in representative models of upper central incisors, and three simulations had been used: teeth without preparations with and without covering incisal edge, and teeth with preparation in shoulder and layering of incisal edge. These models had been submitted to loads of 100N and 350N in the incisal edge, under angles of 45° and 90° degrees, simulating clinical conditions by carrying patients to the class I and III to the Angle and/or bruxomanos. We observed that the increase of the load, as well as the reduction of the angulations, had promoted an increase to the tensions in the representative models of porcelain laminate, and the models represented by the lithium dissilicato porcelain, presented a better behavior in relation to the distribution of the tensions on teeth restored with feldspatic porcelain laminate.