不同根管预备方法对椭圆形根管预备效果的影响

口腔生物医学 ›› 2022, Vol. 13 ›› Issue (2): 102-106.

不同根管预备方法对椭圆形根管预备效果的影响

沈天晖¹,张悦蓉²,蒋玫¹,王娟²,张光东³

1. 南京医科大学
2. 南京医科大学附属口腔医院
3. 南京医科大学口腔医学院

收稿日期:2022-03-03 修回日期:2022-04-22 出版日期:2022-06-25 发布日期:2022-07-07
通讯作者: 张光东 E-mail:egd_zhang@njmu.edu.cn
基金资助:
南京市卫生科技发展项目

The effects of different techniques for preparing oval-shaped canals

Received:2022-03-03 Revised:2022-04-22 Online:2022-06-25 Published:2022-07-07

摘要/Abstract

摘要： 目的：比较4种不同的根管预备方法对椭圆形根管的预备效果。方法：选取1颗离体椭圆形单根管的上颌第二前磨牙，以此为原型获取80颗3D打印模型牙，随机分成4组（n=20），分别使用机用Protaper镍钛器械（A组）、机用Protaper镍钛器械结合20#手用H锉（B组）、机用Protaper镍钛器械结合25#手用H锉（C组）、机用Protaper镍钛器械结合30#手用H锉（D组）按冠向下法进行预备。对所有3D打印牙进行术前术后Micro-CT扫描并重建三维图像，测量体积增量、表面积增量、牙本质去除量及根管壁未预备面积百分比，采用单因素方差分析和LSD检验进行统计学分析（P<0.05）。结果：一致性检验发现，80颗3D打印牙预备前体积及表面积无显著差异（P>0.05）。C组和D组体积增量及牙本质去除量多余A组和B组（P<0.05）；D组表面积增量多余其余三组，而根管壁未预备面积百分比小于其余三组（P<0.05）。结论：对于椭圆形根管，Protaper镍钛器械结合大号H锉可更充分地预备根管。

关键词: 椭圆形根管, 根管预备, ProTaper镍钛锉, H锉, 3D打印

Abstract: Objective：To compare the ability of four different root canal preparation methods on the oval-shaped root canal anatomy using 3-dimensional(3D) printing technology. Methods：An extracted maxillary second premolar with a single oval-shaped canal was selected and scanned with micro-computed tomographic imaging, and 80 replicas of the teeth were produced with a 3D printer. Replicas were assigned into 4 groups(n=20) and shaped with ProTaper systems (A); ProTaper systems and 20# H files (B); ProTaper systems and 25# H files (C); ProTaper systems and 30# H files(D) in a crown-down technique. Before and after root canal preparations, all samples were scanned by micro-computed tomography scanner and three-dimensional images were reconstructed. Images recorded were evaluated for morphometric measures regarding increase in canal volume, dentin removed, surface area and untouched walls. Statistical analysis of data was performed using One-way analysis of variance and LSD tests(P<0.05). Results：When comparing among groups, there was no significant difference regarding the volumes and surface areas before preparing root canals (P>0.05).Group C and group D showed more increases in canal volume and dentin removed than those in group A and group B (P<0.05). Group D had the most increase in surface area and the least percentage of untouched walls. (P<0.05). Conclusions：ProTaper NiTi instruments combined with large size H-files presented the best cleaning ability in the oval-shaped root canals.

Key words: oval-shaped canal, Root canal preparation, ProTaper NiTi instrument, H-file, 3-dimensional printing

沈天晖张悦蓉蒋玫王娟张光东. 不同根管预备方法对椭圆形根管预备效果的影响[J]. 口腔生物医学, 2022, 13(2): 102-106.

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