锥度和根尖预备尺寸对根管抗折能力的影响。

The effect of taper and apical preparation size on fracture resistance of roots.

机构信息

Department of Endodontics, Faculty of Dentistry, Bursa Uludag University, Bursa, Turkey.

Department of Endodontics, Faculty of Dentistry, Kırıkkale University, Kırıkkale, Turkey.

出版信息

Aust Endod J. 2021 Apr;47(1):67-72. doi: 10.1111/aej.12472. Epub 2020 Dec 9.

DOI:10.1111/aej.12472

PMID:33296118

Abstract

This study investigated the effect of taper and apical preparation size on the fracture resistance of roots. 84 mandibular incisor teeth were selected. Groups (n = 12): uninstrumented (control group), 25/0.04, 25/0.06, 25/0.08, 30/0.04, 30/0.06 and 30/0.08. K3XF files (Kerr Endodontics, Orange, CA) were used for canal preparation. Fracture resistance was tested using a Universal test machine. For statistical analysis, the level of significance was P ≤ 0.05, and one-way anova and post hoc LSD tests were used. The control group showed the highest fracture resistance (P < 0.05). No significant difference was found between 25/0.04 and 25/0.06; 25/0.06 and 25/0.08; 30/0.04 and 30/0.06; 30/0.06 and 30/0.08; 25/0.04 and 30/0.04; 25/0.06 and 30/0.06; and 25/0.08 and 30/0.08 (P > 0.05). Significant differences were found between 25/0.04 and 25/0.08; 30/0.04 and 30/0.08; and 25/0.08 and 30/0.04 (P < 0.05). In conclusion, the clinical selection of larger tapers can cause a higher risk of fracture.

摘要

本研究旨在探讨锥度和根尖预备尺寸对根管抗折能力的影响。共选取 84 颗下颌切牙。分为 6 组（n=12）：未预备（对照组）、25/0.04、25/0.06、25/0.08、30/0.04、30/0.06 和 30/0.08。使用 K3XF 文件（Kerr Endodontics，Orange，CA）进行根管预备。使用万能试验机测试抗折能力。采用单因素方差分析和 LSD 事后检验进行统计学分析，P≤0.05 为差异有统计学意义。对照组的抗折能力最高（P<0.05）。25/0.04 与 25/0.06、25/0.06 与 25/0.08、30/0.04 与 30/0.06、30/0.06 与 30/0.08、25/0.04 与 30/0.04、25/0.06 与 30/0.06、25/0.08 与 30/0.08 之间差异均无统计学意义（P>0.05）。25/0.04 与 25/0.08、30/0.04 与 30/0.08、25/0.08 与 30/0.04 之间差异有统计学意义（P<0.05）。结论：临床选用较大锥度可能会增加根管折裂的风险。