A comparison of thermoplasticized injectable gutta-percha techniques in ribbon-shaped canals : adaptation to canal walls.
10.5395/JKACD.2002.27.4.411
- Author:
Hyun Sook HWANG
1
;
Kyung Mo CHO
;
Jin Woo KIM
Author Information
1. Department of Conservative dentistry, College of Dentistry, Kangnung National University, Korea.
- Publication Type:Original Article
- Keywords:
Ribbon-shaped canal;
Thermoplasticized injectable gutta-percha technique;
Adaptability
- MeSH:
Gutta-Percha
- From:Journal of Korean Academy of Conservative Dentistry
2002;27(4):411-420
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The aim of this study is to compare the adaptability of thermoplasticized injectable gutta-percha technique to the canal walls in ribbon-shaped canals. Thirty resin models simulated ribbon-shape canals were instrumented to #40 using .06 taper Profile systems. Three groups of each 10 resin models were obturated by the lateral condensation technique(LC) and the two thermoplasticized injectable gutta-percha technique; Ultrafil Endoset+Obtura II(EO) and Ultrafil Firmset(UF), respectively. After resin model were kept at room temperature for 4 days, they were resected horizontally with microtome at 1, 2, 3, 4 and 5mm levels from apex. At each levels, image of resected surface were taken using CCD camera under a stereomicroscope at x40 magnification and stored. Ratio of the area of gutta-percha was obtained by calculating area of gutta-percha cone to the total area of canal using digitized image-analyzing program. The data were collected then analyzed statistically using One-way ANOVA. The results were as follows. 1. At 1mm levels, there was no statistically significant difference in the mean ratio of gutta-percha among the groups. 2. At 2mm level, EO showed the highest mean ratio of gutta-percha (p<0.05) and there was no significant difference between LC and UF. 3. At 3, 4, 5mm levels, EO and UF had significantly greater mean ratio of gutta-percha than LC(p<0.05) and there was no significant difference between EO and UF. In conclusion, the thermoplasticized injectable gutta-percha techniques demonstrated relatively favorable adaptability to canal walls than lateral condensation technique in ribbon-shaped canals except for 1mm level.
