逐步后退法;弯曲根管;根管预备;根管充填。
Step-back technique; Curving root canal; root canal preparation; root canal condensation.
不锈钢K锉组(SS)采用常规手用不锈钢K锉、逐步后退法预备根管。
The third group were prepared using the stainless steel hand K-files with the step-down technique(SS group).
不锈钢K锉组(SS)采用常规手用不锈钢K锉、逐步后退法预备根管。
The third group were prepared using the stainless steel hand K-files with the step-down technique(SS group).
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