ProTaper手动锉预备弯曲根管的临床评价

目的评价ProTaper手动锉预备弯曲根管的临床疗效。方法将40颗具弯曲根管需行根管治疗的患牙随机分为两组：试验组用ProTaper手动锉及冠根向技术预备根管，对照组用K锉及逐步后退技术预备根管。两组均采用侧向加压充填法充填根管，用X线片评价根管预备的效果。结果ProTaper手动锉组无根管偏移、根尖堵塞、台阶形成、器械折断等并发症发生，能维持根管的弯曲度和走向，根管锥度和流畅度佳；操作时间短，且术后疼痛发生率低。结论ProTaper手动锉预备弯曲根管快速、安全、有效，临床应用价值较高。

Clinical Evaluation of Hand-used ProTaper Instruments in Preparation of Curved Root Canals

Objective To evaluate the effect of hand-used ProTaper instruments in preparation of curved root canals. Methods Forty teeth with curved root canards were randomly divided into 2 groups of 20 specimens each. One group was prepared by hand-used ProTaper with crown-down technique. The control group was instrumented by K-fries with step-back technique. The canals were obturated using lateral condensation technique in both groups. The efficiency of preparation and obturation of root canals was analyzed with radiographs pre-, during and post- instrumentation. Results No transpoxtation, apical blockage, ledge and instrument fractures were occurred with hand-used ProTaper instruments and the original curvature was maintained well. The operating time was shorter and post-treatment pain seldom occurred in hand-used ProTaper group. Conclusion Hand-used ProTaper instruments were proved to be efficient and time-saving in preparing curved root canals.