수술가이드를 이용한 무피판 임플란트 술식에서 임플란트 드릴링이 열발생에 미치는 효과
The effect of guided flapless implant procedure on heat generation from implant drilling
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연구 목적: 본 연구에서는 수술가이드를 이용한 무피판 임플란트 술식에서 임플란트 드릴링이 열발생에 미치는 효과를 측정하였으며 드릴링 방법에 따른 온도 차이를 측정하고자 하였다. 연구 재료 및 방법: 하악 양측 제 1 대구치와 제 2 대구치가 없는 실험 모델에서 피판을 거상하는 임플란트 수술(실험A군)과 수술가이드를 이용한 무피판 임플란트 수술(실험B군), 그리고 핸드피스의 상하 수직 움직임을 제한한 후 수술가이드를 이용하여 무피판 임플란트 수술(실험C군)을 각각 진행하여 온도 측정을 하였다. 임플란트 드릴링 시 온도 측정은 thermocouple과 열전식 온도 기록계(Yokogawa, Tokyo, Japan)를 이용하여 측정하였다. 온도 측정 위치는 최종 임플란트 드릴(직경 3.8 mm)의 경계부에서 0.5 mm 떨어진 곳에서 3 mm 깊이(설측)와 6 mm 깊이(협측)로 하였다. 측정된 온도 값을 이용하여 종속변수인 온도가 정규분포 하는지를 검정하기 위해 Kolmogorov-Smirnov test를 거쳐 확인한 후 세 수술 방법 간의 평균 온도 차이를 검정하기 위해 independent t-test로 분석하였다. 결과: 피판을 거상하고 드릴링을 한 수술군(실험A군)에서 평균 온도는 27.2℃(SD ± 2.1℃)를 보였고 피판을 거상하지 않고 드릴링을 한 수술군(실험B군)에서 평균 27.5℃ (SD ± 2.3℃)를 나타냈다. 이들 두 수술 방법 간 온도비교에서는 통계학적으로 유의한 차이를 보이지 않았다. 수술가이드를 이용하여 무피판 수술 시 상하 수직 움직임(upand-down pumping motion)이 없이 드릴링을 시행한 수술군(실험C군)에서 평균온도는 37.0℃(SD ± 3.4℃)을 보였다. 이를 상하 수직 움직임으로 드릴링을 한 무피판 임플란트 수술군(실험B군)과 비교 시 통계학적으로 유의한 온도 차이를 보였다. 결론: 수술가이드를 이용하여 무피판 임플란트 수술 시 핸드피스를 상하 수직 움직임으로 드릴링을 시행하면 피판을 거상하여 수술할 때와 온도차이가 발생하지 않으나, 상하 수직 움직임 없이 드릴링을 시행하면 드릴링 시 높은 온도 상승을 보인다.
Abstract
Purpose: The aim of this study was to evaluate the heat generation in bone in vitro during the guided flapless drilling procedure and the effect of drilling methods on the heat generation. Materials and methods: A model that has missing the first and second mandibular molars bilaterally was used. In group A, classical flap implant surgery was performed. In group B, flapless implant surgery using surgical guide was performed. In group C, flapless implant surgery using surgical guide without up-and-down pumping motion was performed. Temperature was measured with k-type thermocouple and a real-time digital thermometer. The thermocouples were placed at 0.5 mm away from the osteotomy area at the depths of 3 mm and 6 mm. The measured values were evaluated with independent t-test. Results: The mean temperature generated was 27.2℃ (SD ± 2.1℃) and 27.5℃ (SD ± 2.3℃) for groups A and B, respectively. These differences were not statistically significant. In group C, the mean temperature was 37.0℃ (SD ± 3.4℃). There were statistically significant differences between groups B and C with respect to the mean temperature. Conclusion: These findings suggest that guided flapless drilling with up-and-down pumping motion may not significantly increase the bone temperature.
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