根管预备技术和器械长度对根尖根裂形成的影响。
The effect of root preparation technique and instrumentation length on the development of apical root cracks.
作者信息
Adorno Carlos G, Yoshioka Takatomo, Suda Hideaki
机构信息
Tokyo Medical and Dental University, Pulp Biology and Endodontics, Tokyo, Japan.
出版信息
J Endod. 2009 Mar;35(3):389-92. doi: 10.1016/j.joen.2008.12.008.
The purpose of this study was to compare the effects of root canal preparation techniques and instrumentation length on the development of apical root cracks. Forty extracted mandibular premolars with straight roots were randomly selected and mounted on resin blocks with simulated periodontal ligaments, and the apex was exposed. The teeth were divided into four groups of 10 teeth each for different canal preparation techniques and instrumentation lengths: group A: step-back preparation (SB) with stainless steel files (SF) using root canal length (RCL) to guide instrumentation length; group B: SB using RCL - 1 mm; group C: crown-down preparation (CD) with Profile using RCL; and group D: CD with PF using RCL - 1 mm. Digital images of the instrumentation sequence were compared for each tooth. Statistical analysis revealed a significant effect of instrumentation length (p < 0.05) but no significant effect of preparation technique (p > 0.05) on the development of apical cracks.
本研究的目的是比较根管预备技术和器械长度对根尖根裂形成的影响。随机选取40颗具有直根的拔除下颌前磨牙，安装在带有模拟牙周韧带的树脂块上，并暴露根尖。将牙齿分为四组，每组10颗，采用不同的根管预备技术和器械长度：A组：使用不锈钢锉（SF）进行逐步后退法预备（SB），采用根管长度（RCL）引导器械长度；B组：SB采用RCL - 1 mm；C组：使用Profile进行冠向下法预备（CD），采用RCL；D组：CD采用PF，采用RCL - 1 mm。对每颗牙齿的器械操作序列的数字图像进行比较。统计分析显示，器械长度对根尖裂纹的形成有显著影响（p < 0.05），但预备技术对其无显著影响（p > 0.05）。
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