TY - Jour A2 - Lombardi，Tommaso Au - Alkahtany，Sarah M. Au - Al-Madi，EBTISSAM M. PY - 2020 DA - 2020/04/08 XP-Endo Shaper and Propaper root仪仪器仪器仪表后通用：微锁定断层扫描评估SP - 4030194 VL - 2020 AB -据italic> 目的据/italic>。通过微型断层（Micro-CT）分析，评估用XP-Endo Shaper（XPE）和PTU的蛋白质温度（XPE）和PTU）进行仪表仪器中的牙根微裂纹。据italic> 方法据/italic>。本研究中使用了含有两种分离的颌骨臼齿的20neeen的根系（Vertucci型IV）。根管（据italic> N据/italic> = 38) were divided into 2 groups. Group 1 (据italic> N据/italic> = 19): all MB canals were instrumented with XPES. Group 2 (据italic> N据/italic> = 19): all ML canals were instrumented with PTU. All roots were scanned with micro-CT before and after instrumentation. Two precalibrated examiners evaluated the cross-sectional images of each sample with DataViewer program. The dentinal microcracks (complete and incomplete) were counted in each third of the root for the preinstrumentation and the postinstrumentation images. Wilcoxin signed-rank and Mann–Whitney据italic> 你据/italic>测试用于统计分析的显着性水平据inline-formula> P.据/mml:mi> 据据/mml:mo> 0.05据/mml:mn> 。据italic> 结果据/italic>。微裂纹的数量显着增加（据inline-formula> P.据/mml:mi> 据据/mml:mo> 0.05据/mml:mn> ）用中间和宫颈三分之二的XPE仪器进行仪器。微裂纹的数量显着增加（据inline-formula> P.据/mml:mi> 据据/mml:mo> 0.05据/mml:mn> ）在宫颈三分之二的PTU仪表后仪器。宫颈和顶端三分之二的群体之间没有显着差异。在中间三分之一，XPES诱导比PTU更不完整的微裂纹（据inline-formula> P.据/mml:mi> 据据/mml:mo> 0.05据/mml:mn> ）。据italic> 结论据/italic>。在该研究的局限内，XPES和PTU之间的牙本质微裂纹形成无显着差异，在根的宫颈三分之二的宫颈三分之一。然而，XPES仪器在人根中间三分之一的中三分之一的PTU诱导更不完整的微裂纹。SN - 1687-8728 UR - https://doi.org/10.1155/2020/4030194 do - 10.1155 / 2020/4030194 jf - 国际牙科Pb - Hindawi Kw - ER -据/body>