Journal article
Comprehensive characterisation of flexural mechanical properties and a new classification for porosity of 11 contemporary ion-leaching dental restorative materials
C Ruengrungsom, MF Burrow, P Parashos, JEA Palamara
Journal of the Mechanical Behavior of Biomedical Materials | ELSEVIER | Published : 2021
Abstract
The objectives of this study were to evaluate 4 aspects of ion-leaching restorative materials (ILMs): 4-point bending flexural strength (4 PB-FS) and relative mechanical properties; biaxial flexural strength (B-FS) in relation to 4 PB-FS; porosity; and surface morphology. Eleven ILMs were used for the 4-point bending test. Bar-shaped (n = 15) samples were fabricated, stored in distilled water for 7 days. Then 4 PB-FS and the other mechanical properties were determined. Five ILMs were selected for the B-FS test using disk specimens (n = 15). The correlation between 4 PB-FS and B-FS was addressed. After the 4 PB test, 5 randomised fragments from each material were used to make 0.5 mm-thick sec..
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Funding Acknowledgements
The authors gratefully acknowledge Ms. Su Toulson for all laboratory support, especially SEM evaluation, and the Office of the Higher Education Commission, Thailand, giving the Ph.D. scholarship to Chirayu Ruengrungsom. Deep gratitude is extended to GC Australasia Dental PTY LTD, SDI Company Australia, Shofu Dental AsiaPacific PTE LTD, DenMat Thailand, 3 M ESPE Thailand, SD Tantavade Thailand (Dealer of Activa Bioactive Restorative) , and Ivoclar Vivadent Thailand for the supply of the materials. Sincere gratitude is also extended to the Melbourne Dental School and Advance Microscopy Platform of the Bio21 Institute, the University of Melbourne, Australia, for supporting the other research materials and instruments.