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Comparison between two post-dentin bond strength measurement methods
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DOI：10.1038/s41598-018-20891-3.png)
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摘要
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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.
Keyword:
PUSH-OUT TESTS
FIBER POSTS
ADHESIVE SYSTEMS
COMPOSITE DISK
BOVINE
MICROTENSILE
DEGRADATION
FRICTION
CEMENTS
MODEL
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IF:
3.9
论文数:
28.0W
被引数:
83.5W
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