Acoustic properties of fracture of dental restorative materials and endocrown restorations under quasi-static loading.

Objectives: (1) To investigate the properties of acoustic emission (AE) signals from fracture of dental materials and endocrown restorations during quasi-static compression using the continuous wavelet transform analysis. (2) To determine by the parameters of AE signals in which structural element of tooth-endocrown system the fracture starts.

Methods: Five restorative materials (zirconium dioxide (Prettau zirconia), ceramics (IPS e.

Features of fracture of prosthetic tooth-endocrown constructions by means of acoustic emission analysis.

Objective: The study aims at comparing the fracture resistance of different restorative materials used in dental endocrown restorations and respective endocrown restorations under a quasi-static compressive load using acoustic emission (AE) method.

Methods: Five restorative materials were used in this study. The restorative materials were manufactured into discs 13mm in diameter and 5mm thick, which were then divided into 5 groups and included into Type 1: Group B: zirconium dioxide (Prettau zirconia); Group C: ceramics (IPS e.