目的:研究离体下颌前磨牙的牙根及根管形态。
Objective: To investigate the root and canal morphology of extracted mandibular premolars.
方法:从6颗离体的形态正常的人右下颌第一磨牙中,选取密合度最好且形态接近临床要求的1颗进行根管治疗,制作制锁式的带桩嵌体修复体。
METHODS: 1 of the 6 first mandibular molars on the right side with normal morphology in vitro was selected for pulpectomy, which was the best in density and near to clinical requirement in morphology.
方法:25颗离体直根管前牙,随机分为5组,不锈钢K锉常规法预备根管,应用5种冲洗剂组合进行冲洗。
METHODS: 25 extracted human maxillary anterior teeth, with a single straight root were randomly divided into 5 groups. They were instrumented with K-files and conventional preparation technique.
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