超音波振動を応用した根管充填に関する基礎的研究 : 第 2 報 Obtura と TCM の評価

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The state of root canal obturation at various portions of the canal after the use of ultrasonic vibration for root canal preparation and irrigation was examined in this study. Twenty extracted human teeth were used and the canals were filled by two methods, Obtura and Thermomechanical condensation method (TCM). Degree of canal obturation and reaching of the gutta-percha point to the apical seat were examined on radiograms and obturation of various portions of the canal (mid-canal, apical third, and root apex) was observed under the microscope. The results were as follows : 1. On radiograms, obturation of the small canals was worse than that of the large canals for both Obtura and TCM. Particularly, obturation at root apex portion was poor in two cases out of five cases for Obtura. 2. Reaching of the gutta-percha point to the apical seat of the small canals was 'under' in two cases out of five, 'over' in two cases out of five and the rest was 'flush' for Obtura. In the case of the large canals, reaching of the gutta-percha point to the apical seat was 'flush' in four cases out of five and the rest was 'under' for Obtura. For TCM, in the case of small canals, it was 'flush' in two cases, 'over' in two cases and the rest was 'under'. As regards the five large canals all cases were 'flush'. 3. On observation under the microscope for TCM, obturation of the small canals was worse than that of the large canals. For TCM, especially, obturation at apical third portion was 'good' in three cases out of five and the other two cases were 'rather poor'.
九州歯科学会の論文
1989-06-25

超音波振動を応用した根管充填に関する基礎的研究 : 第 2 報 Obtura と TCM の評価

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