Objective To compare the resistance to fracture of the root canals after instrumentation or not.
目的比较预备与不预备的根管以及预备后充填与不充填的根管抗折力。
The influence of fracture mode and wear surface pullout on wear resistance was studied.
研究了断裂方式对磨损表面剥落和耐磨性的影响。
The influence of fracture mode and wear surface pullout on wear resistance was studied.
研究了断裂方式对磨损表面剥落和耐磨性的影响。
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