Surface Characteristics of Reciprocating Instruments Before and After Use - A SEM Analysis

Brazilian Dental Journal

Aida Rene Assayag Hanan¹  Daniely Amorin De Meireles¹  Emílio Carlos Sponchiado Júnior¹  Simone Hanan¹  Milton Carlos Kuga¹  Idomeo Bonetti Filho¹ 

关键词: reciprocating motion;    nickel-titanium file;    microscopy.;   

DOI  :  10.1590/0103-6440201300208

来源: SciELO

【 摘 要 】

The presence of debris, defects and deformations of endodontic reciprocating instruments before and after chemical-mechanical preparation (MCP) was analyzed using scanning electron microscopy (SEM). The following 26 instruments were divided into 2 groups: Waveone (n=13) and Reciproc (n=13) and examined by SEM (150 x magnification) prior to canal preparation at 2 and 4 mm from the tip. The instruments were used in the preparation of mesial root canals of 26 extracted human permanent mandibular molars. The instruments were then washed in ultrasonic bath and subjected to new microscopic analysis of debris and deformation by a score that used the presence or absence of irregular edges, grooves, microcavities and burrs as criteria. After the SEM analysis and with the scores of the examiners, the collected data were subjected to descriptive statistical analysis using the Kruskall-Walis and Mann Whitney test at a 5% significance level. All instruments examined presented debris before and after use. A statistically significant difference was found for defects and deformation between the groups (p<0.05). The presence of defects and deformities was higher in the WaveOne instruments, and Reciproc instruments presented a lower rate.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License