Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (34): 5418-5422.doi: 10.3969/j.issn.2095-4344.2014.34.002
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Liu Wen-zhe, Chen Guang-sheng
Revised:
2014-08-07
Online:
2014-08-20
Published:
2014-08-20
Contact:
Chen Guang-sheng, Master, Chief physician, Department of Stomatology, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, Guangdong Province, China
About author:
Liu Wen-zhe, Master, Attending physician, Department of Stomatology, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, Guangdong Province, China
CLC Number:
Liu Wen-zhe, Chen Guang-sheng. Shaping ability of ProTaper Next and ProTaper Universal Ni-Ti rotary endodontic instruments in simulated root canals[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(34): 5418-5422.
2.1 器械的变形及折断情况 两种机用器械在平均使用5个树脂模拟根管后均未出现明显的变形、螺纹松解或折裂。 2.2 根管预备时间 ProTaper Next组和ProTaper Universal组平均所需时间分别为(0.55±0.08) min和(1.23±0.05) min。ProTaper Next组所需时间少于ProTaper Universal组(P < 0.05)。 2.3 预备后根管形态 将两种器械在根管预备前后拍摄图像重叠,见图1。 在根上1/3段,两种器械在根管弯曲内、外侧壁去除树脂量基本相当。在根中1/3段,两种器械在弯曲内侧去除树脂量大于外侧。而在根尖1/3段,两种器械在弯曲内侧去除树脂量小于外侧。这提示两种器械在预备根管中下段时,均可造成不同程度的根管偏移。两种器械弯曲内侧去除树脂量。"
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