| Autor: |
Jaiswal, Krishna R., Meenal, Gulve, Akolkar, Kiran, Roshan, Samuel, Kolhe, Swapnil, Aher, Gayatri |
| Předmět: |
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| Zdroj: |
Journal of International Oral Health; 2015, Vol. 7 Issue 11, p80-83, 4p, 2 Color Photographs, 2 Charts |
| Abstrakt: |
Background: To investigate, the ability of three different rotary nickel titanium retreatment instruments and hand instrumentation to remove gutta-percha and sealer from the root canal. Materials and Methods: 40 freshly extracted human single rooted teeth, each with one root canal, were selected. It was instrumented with K-files and filled using cold lateral compaction with guttapercha and AH Plus sealer. The teeth were randomly divided into four groups of ten specimens each. Removal of gutta-percha was performed with the following devices and techniques: Protaper-R, R-Endo, Mtwo and Hedstrom files. The specimens were rendered transparent and the area of remaining filling material on the root canal wall was measured using a computer image analysis program. Statistical analysis was accomplished by Kruskal-Wallis and Mann- Whitney U-tests with Bonferroni correction for the analysis of residual root filling material and working time. Result: Specimens retreated with the H-files left less filling material inside the root canals than the other groups, but significant difference was found between only H-file and R-Endo (P < 0.05). The retreatment time with the Protaper and Mtwo instruments was significantly shorter as compared to hand instrumentation and R-Endo. Conclusion: Although H-File left significantly less gutta-percha and sealer in the root canal than other instrument groups, but it required more time in removal procedure. Complete removal of materials did not occur with any of the instrument systems investigated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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