CAJ | 학술논문

目的：通过锥体束CT（CBCT）测量下颌切牙管（MIC）的三维位置、走向和毗邻关系，为下颌颏孔间区手术确定安全区提供依据。方法对83例CBCT影像中的下颌切牙管进行观察和测量，统计下颌切牙管的检出率，在尖牙和侧切牙处分别测量下颌切牙管的直径及到根尖、唇颊侧壁、舌侧壁和下颌骨下缘的距离。结果 CBCT上57例（68.7%）显示下颌切牙管，下颌切牙管的直径及距根尖、唇颊侧、舌侧和下颌骨下缘的距离在尖牙处分别为（1.3±0.4）、（8.9±2.9）、（4.3±0.9）、（5.2±1.1）和（8.6±1.5）mm，在侧切牙处分别为（1.0±0.3）、（13.3±4.0）、（4.2±0.9）、（5.9±0.9）和（8.9±1.8）mm。结论CBCT可以清晰显示下颌骨中MIC的三维位置、走向及毗邻关系；能为下颌骨颏孔间区手术的术前评估提供重要信息。
목적：통과추체속CT（CBCT）측량하합절아관（MIC）적삼유위치、주향화비린관계，위하합해공간구수술학정안전구제공의거。방법대83례CBCT영상중적하합절아관진행관찰화측량，통계하합절아관적검출솔，재첨아화측절아처분별측량하합절아관적직경급도근첨、진협측벽、설측벽화하합골하연적거리。결과 CBCT상57례（68.7%）현시하합절아관，하합절아관적직경급거근첨、진협측、설측화하합골하연적거리재첨아처분별위（1.3±0.4）、（8.9±2.9）、（4.3±0.9）、（5.2±1.1）화（8.6±1.5）mm，재측절아처분별위（1.0±0.3）、（13.3±4.0）、（4.2±0.9）、（5.9±0.9）화（8.9±1.8）mm。결론CBCT가이청석현시하합골중MIC적삼유위치、주향급비린관계；능위하합골해공간구수술적술전평고제공중요신식。
Objective This study was conducted to measure the mandibular incisive canal (MIC) by cone beam computed tomography(CBCT)and to assess 3?dimensional structure, course and adjacent structure of the MIC , in order to ensure safe region for surgery of the mandibular interforaminal area. Methods A total of the CBCT images from 83 patients were studied and measured. The detection rates of MIC were calculated The diameter of the MIC and the distances from MIC to the labial and lingual cortices and the inferior border of the mandible and tooth tips were measured at canines and lateral incisors. Results MIC was found in 67.8%of the patients. In the position of canine, the diameter of MIC, the mean distance of the MIC to the tips of the teeth, to the buccal border of the mandible , to the lingual border of the mandible and the inferior border of the mandible were (1.3±0.4), (8.9±2.9), (4.3±0.9), (5.2±1.1) and (8.6± 1.5) mm, respectively. In the position of the incisor, the distance of MIC, the mean distance of the MIC to the tips of the teeth, to the buccal border of the mandible , to the lingual border of the mandible and the inferior border of the mandible were (1.0 ± 0.3), (13.3 ± 4.0), (4.2 ± 0.9), (5.9 ± 0.9) and (8.9 ± 1.8) mm, respectively. Conclusion CBCT clearly show three dimensional structure, course and adjacent structure of the MIC. Preoperative CBCT can provide vital information for surgery of the mandibular interforaminal area.