评估HERO 642、HERO Apical和HERO Shaper旋转系统对牙根牙本质的切割效果。

Evaluation of the root dentine cutting effectiveness of the HERO 642, HERO Apical and HERO Shaper rotary systems.

作者信息

Câmara Andréa Cruz, Aguiar Carlos Menezes, de Figueiredo Jose Antonio Poli

机构信息

Department of Prosthetics and Oral and Facial Surgery, MSc Course in Integrated Clinical Dentistry, Faculty of Dentistry, Federal University of Pernambuco, Recife, Brazil.

出版信息

Aust Endod J. 2008 Dec;34(3):94-100. doi: 10.1111/j.1747-4477.2007.00086.x.

DOI:10.1111/j.1747-4477.2007.00086.x

PMID:19032642

Abstract

Different HERO rotary systems were evaluated by pre- and postoperative images of a cross-section of their mesiobuccal root thirds with a stereoscopic magnifier (45x). Fifty mesiobuccal canals of human mandibular first molars were divided into five groups: 1--HERO 642; 2--HERO 642 and HERO Apical; 3--HERO Shaper; 4--HERO Shaper and HERO Apical; 5--NitiFlex files. The perimeter of the canal was calculated using Image Tool software (UTHSCA). Final, post-instrumentation perimeters were compared by Kruskal-Wallis test (P = 0.05). The distribution of the values of the final canal perimeter for each instrumentation method was not statistically significant in any of the thirds (P = 0.174, cervical third; P = 0.874, middle third; and P = 0.631, apical third). An increase in canal perimeter was observed in all groups. In the cervical third the greatest increase was Group 5; in the middle third, Group 4, and in the apical third, Group 2.

摘要

使用立体放大镜（45倍）通过术前和术后近中颊根三分之一横截面图像评估不同的HERO旋转系统。将50颗人下颌第一磨牙的近中颊根管分为五组：1组——HERO 642；2组——HERO 642和HERO Apical；3组——HERO Shaper；4组——HERO Shaper和HERO Apical；5组——镍钛合金锉。使用Image Tool软件（德克萨斯大学健康科学中心圣安东尼奥分校）计算根管周长。最终，通过Kruskal-Wallis检验（P = 0.05）比较器械操作后的周长。每种器械操作方法的最终根管周长值在任何三分之一处的分布均无统计学意义（颈段三分之一：P = 0.174；中段三分之一：P = 0.874；根尖段三分之一：P = 0.631）。所有组均观察到根管周长增加。在颈段三分之一处，最大增加量出现在5组；在中段三分之一处，4组；在根尖段三分之一处，2组。