Comparison between two post-dentin bond strength measurement methods

Laikuan Zhu, Yuping Li, Yung Chung Chen, Carola A. Carrera, Chong Wu, Alex Fok

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The push-out (PO) test and the diametral compression (DC) test were performed to compare the merits of two post-dentin bond strength measurement methods. Compared with the push-out test, the disk in DC provided post-dentin bond strength measurements that were more precise. The load-displacement curves from the DC test were much smoother and more linear up to the point of fracture when compared to those from the PO test. Compared to the PO test, DC is easier to perform for determining the bond strength between posts and dentin. No specimen alignment is needed in the DC test, and it produces a smaller standard deviation in the measured bond strength. The main disadvantage of the DC test, however, is that finite element analysis (FEA) is required to calculate the bond strength. The shear bond strength given by the PO test based on the simple formula is not valid, though, and the peak failure load is dependent on friction at the post-dentin interface.

Original languageEnglish
Article number2350
JournalScientific reports
Issue number1
Publication statusPublished - 2018 Dec 1

All Science Journal Classification (ASJC) codes

  • General


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