结果：新型根管充填材料能够严密地封闭根尖孔，与根管壁间的密合性优于常用根管充填材料。
Result: The novel root canal material can seal apical densely and has better degree of obturation than normal materials.
本文全面地介绍了碎石混凝土抛掷充填工艺，并阐述了PC - 1型抛掷机的结构、性能和工作原理。
This paper fully describes the filling process and introduces the structure, performances and operation principle of ModeI PC-1 thrower.
数字化牙片可迅速、准确地了解根管预备、根管长度及根管充填情况，优于传统牙片。
Digital periapical film can quick understand the root canal preparation, root canal length and root canal filling accurately, surpassing conventional periapical film.
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