Análise estrutural e mecânica de cerâmicas vítreas reforçadas por dissilicato de lítio

Abstract

Lithium disilicate reinforced ceramics are one of the most important materials for dental rehabilitation, due to its excellent physical and chemical stability. Nowadays, lithium disilicate glass-reinforced ceramics are frequently selected as indirect restorative material for all-ceramic restorations. After the end of the patent, other companies started to produce new versions of this material, and the manufacturers suggest that these ceramics have adequate and compatible structural, morphological, and mechanical properties for CAD/CAM applications. Therefore, this study was divided into 4 specific objectives: Objective 1: The aim of this study was to compare two commercial brands of lithium disilicate glass-reinforced ceramics for CAD/CAM system (IPS e.max CAD and Rosetta SM), evaluating their structural, morphological and mechanical properties; Objective 2: The objective of this study was to present and validate a methodology for measuring the average size of ceramic crystals and their percentage using images obtained by scanning electron microscopy (SEM). Objective 3: To compare 4 distinct commercial lithium disilicate glass-reinforced ceramics brands, IPS E.max (Ivoclar Vivadent), Rosetta SM (Rosetta SM, Hass), T-lithium (Talmax) and IRIS (Mainland), by evaluating their structural, morphological and mechanical properties. Objective 4: In this clinical case report, a limit situation is shown with the replacement of unsatisfactory metal-ceramic crowns in the elements 12, 11, 21 and 22 by all-ceramic lithium disilicate glass-reinforced crowns, in a patient with skeletal anterior open bite.