目的：定量研究弯曲根管预备过程中根管的偏移。
AIM: To evaluate root canal deviation during instrumentation of curved root canals.
目的：评价HERO 642镍钛锉预备磨牙弯曲根管的临床疗效。
Objective: To evaluate the effect of HERO642 nickel-Titanium files in preparation of curved root canals.
目的：评价用平衡力法预备弯曲根管的临床疗效。
AIM: To evaluate the clinical effect of balanced force technique in preparation of curved root canals.
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.
分别预备到主尖锉30号和40号，对各组器械预备前后的根管弯曲度和预备时间进行测量。
Root canal preparation was carried out at two stages: first to size 30, then to size 40. The root canal curvatures before and after preparation as well as preparation time were measured.
在清理和成形过程中弯曲根管比直根管易于产生各种并发症。本研究用不同的根管器械和预备技术预备弯曲根管。
The incidence of canal complication is higher in curved root canal than in straight one during the instrumentation.
在清理和成形过程中弯曲根管比直根管易于产生各种并发症。本研究用不同的根管器械和预备技术预备弯曲根管。
The incidence of canal complication is higher in curved root canal than in straight one during the instrumentation.
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