Effects of design parameters on fracture resistance of glass simulated dental crowns

Dental Materials : Official Publication of the Academy of Dental Materials
Zhongpu ZhangMichael V Swain

Abstract

This study aimed to individually quantify the effects of various design parameters, including margin thickness, convergence angle of abutment, and bonding conditions on fracture resistance of resin bonded glass dental crown systems (namely, glass simulated crown). An in vitro experimental test and an in silico computational eXtended Finite Element Method (XFEM) were adopted to explore crack initiation and propagation in glass simulated crown models with the margin thickness ranging from 0.8 to 1.2mm, convergence angle from 6° to 12°, and three different bonding conditions, namely non-bonded (NB), partially bonded (PB), fully bonded (FB). The XFEM modeling results of cracking initiation loads and subsequent growth in the glass simulated crown models were correlated with the experimental results. It was found that the margin thickness has a more significant effect on the fracture resistance than the convergence angle. The adhesively bonded state has the highest fracture resistance among these three different bonding conditions. Crowns with thicker margins, smaller convergence angle and fully bonded are recommended for increasing fracture resistance of all-ceramic crowns. This numerical modeling study, supported by the experimenta...Continue Reading

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Citations

Apr 21, 2017·International Journal for Numerical Methods in Biomedical Engineering·Dequan ZhangQing Li
Jul 13, 2016·Scientific Reports·Ali EntezariQing Li
May 8, 2018·Journal of Prosthodontic Research·Ebrahim MaghamiJames Kit-Hon Tsoi
Mar 20, 2019·Scientific Reports·Boyang WanQing Li
Jul 10, 2021·Clinical and Experimental Dental Research·Alexandre Luiz Souto BorgesMutlu Özcan

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