An In-Vitro Comparative Evaluation of Different Obturation Techniques for Simulated Internal Resorptive Cavities
Keywords:
Internal resorptive cavities, hybrid technique, thermo plasticized guttapercha technique, ultrasonicAbstract
Background: To compare and evaluate the quality of obturation in simulated internal resorptive cavities using different guttaperchaobturation techniques namely, hybrid (combination of lateral and vertical compaction), ultrasonic compaction and thermo plasticized guttapercha technique and also to compare radiographic and stereomicroscopic methods to evaluate the quality of obturation.
Materials and Methods: Thirty extracted maxillary central incisors were instrumented at the working length to a #50 file. The roots were sectioned transversely with a diamond disc at 7 mm from the anatomical apex. At the opening of the root canal of each section, hemicircular cavities were drilled with a specially designed bur. The corresponding root sections were cemented with glue, thus obtaining root canals with similar cavities that simulated internal resorption. The specimens were randomly separated into three groups of 10 each. The following obturation techniques were evaluated. Group A: Hybrid technique (combination of lateral and vertical compaction); Group B: Ultrasonic compaction (Satellac); Group C: Injectable thermo plasticized gutta-percha technique (Ultrafil). After obturation, the teeth were radiographed in buccolingual and mesiodistal directions to evaluate the quality of obturation at the Internal Resorptive Cavities (IRC). The incisors were then cut with a scalpel at the same levels as the previous section to examine the type of material that filled the Internal Resorptive Cavities, under a stereomicroscope.
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