The effect of early coronal flaring about apical extrusion of debris.
10.5395/JKACD.2004.29.2.147
- Author:
Min Kyung KIM
1
;
Jeong Beom MIN
;
Ho Keel HWANG
Author Information
1. Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea. rootcanal@hanmail.net
- Publication Type:Original Article
- Keywords:
Apically extruded debris;
Hand instrumentation;
Hero 642;
Protaper;
K3;
Early coronal flaring
- MeSH:
Dental Instruments;
Tooth Apex
- From:Journal of Korean Academy of Conservative Dentistry
2004;29(2):147-152
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to investigate the quantity of debris which was extruded apically after canal instrumentation using different types of enlarging instrument in endodontic resin models. Five groups of 9 endodontic resin models were instrumented using each different technique : hand instrumentation without early coronal flaring, hand instrumentation after early coronal flaring, and three nickel-titanium engine-driven instrumentations (Hero 642, Protaper, K3). Debris extruded from apical foramen during instrumentation was collected on preweighed CBC bottle, desiccated and weighted using electronic balance. The results were analyzed using Kruskal-wallis test and Mann-Whitney U rank sum test at a significance level of 0.05. The results were as follows: 1. All of instrumentation techniques produced apically extruded debris. 2. Group without early coronal flaring extruded significant more debris than groups with early coronal flaring. 3. There was no significant difference among early coronal flaring groups. The early coronal flaring is very important to reduce the amount of debris extruded apically.
