Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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A COMPARISON OF THERMOPLASTICIZED INJECIABLE GUTTA-PERCHA TECHNIQUES IN RIBBON-SHAPED CANALS : ADAPTATION TO CANAL WALLS

리본 형태의 근관에서 열연화주입법의 근관벽에 대한 적합도에 관한 연구

  • Hwang, Hyun-Sook (Department of Conservative dentistry, College of Dentistry, Kangnung National University) ;
  • Cho, Kyung-Mo (Department of Conservative dentistry, College of Dentistry, Kangnung National University) ;
  • Kim, Jin-Woo (Department of Conservative dentistry, College of Dentistry, Kangnung National University)
  • 황현숙 (강릉대학교 치과대학 보존학교실) ;
  • 조경모 (강릉대학교 치과대학 보존학교실) ;
  • 김진우 (강릉대학교 치과대학 보존학교실)
  • Published : 2002.07.01
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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 micro-tome 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 $\times$40 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-ana-Iyzing 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.

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References

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