step-back technique中文，step-back technique的意思，step-back technique翻译及用法

2026-04-14 09:57 浏览次数 19

step-back technique

逐步后退法

step-back technique 例句

英汉例句

  • methods forty-five mesiobuccal root canals in fleshly extracted nu a an molar teeth were instrumented by the step-back technique , the step-down technique or the passive step-back technique.

    目的对逐步后退法、逐步深入法、被动逐步后退法（超声波与手用器械联合应用）三种不同方法预备后牙细弯根管的根管清理能力及操作时间进行比较研究。

  • methods: 79 single canal extracted anterior teeth were instrumented with step-back technique and then randomly divided into three group.

    方法：选择79颗单直根管离体前牙，经逐步后退法预备根管。

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