2017 №03 (02) DOI of Article
2017 №03 (04)

Technical Diagnostics and Non-Destructive Testing 2017 #03
Technical Diagnostics and Non-Destructive Testing, №3, 2017 pp. 21-28
AE-diagnostics of fracture of dental restoration materials
V. R. Skalsky1, V. F. Makeev2, O. M. Stankevich1, O. S. Kirmanov2
1G. V. Karpenko Physical-Mechanical Institute of the NAS of Ukraine, 5, Naukova str., 79060, Lviv, Ukraine. Е-mail: skalsky.v@gmail.com
2Danylo Halytsky Lviv National Medical University, 69, Pekarska str., 79010, Lviv, Ukraine, Е-mail: ort_stom@meduniv.lviv.ua
The features of fracture of different types of dental materials for temporary orthopedic structures and endocrowns under tensile and compression loads, respectively, were considered. For the analysis of acoustic emission signals, a continuous wavelet transformation was used. According to the energy criterion, the distribution of typical types of macro-fracture for each material was established. The results of investigations are correlated with those known in the literature. It was established that for both types of dental materials of different nature, a common feature is the alternation of viscous and viscous-brittle fracture with a brittle one throughout the entire time of loading the specimens. 28 – Ref., 2 – Tab., 8 – Fig.
Key words: dental materials, fracture, acoustic emission, wavelet transformation, energy criterion
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