锥形束CT对下颌下腺窝解剖形态的分析研究

Anatomical morphology of the submandibular gland fossa by cone beam CT

利用锥形束CT(CBCT)对成人下颌下腺窝解剖形态进行分析,为下颌磨牙区进行牙种植手术提供参考。选取88例下颌磨牙缺失患者的CBCT图像进行重建,在CBCT自带的DCTViewer软件上测量缺失牙冠状面中下颌下腺窝深度。结果显示下颌下腺窝在下颌磨牙区分布不同、凹陷深度不同,CBCT图像所测得下颌下腺窝深度符合正态性分布。其中下颌第一磨牙区存在下颌下腺窝者约占59.4%(38/64),凹陷深度为(1.46±0.69)mm;下颌第二磨牙区存在下颌下腺窝约为83.3%(30/36),凹陷深度(1.84±0.86)mm。下颌骨下颌下腺窝的解剖结构变异较大,在下颌后牙区进行牙种植手术时,应给予充分重视。

To investigate the anatomic morphology of the submandibular gland fossa in adults by cone beam computed tomography （CBCT） system in order to provide evidence for dental implantation in mandibular molar area. The CBCT images of 88 patients with missing mandibular molars were enrolled in this study. The depth of the submandibular gland fossa in the coronal plane of the missing teeth was measured by DCTViewer software. The result showed that the rate of the submandibular gland fossa in dental positions and the depth of the submandibular gland fossa were different. The data of the depth of the submandibular gland were subjected to normal distribution. There were about 59.4% （38/64） in the mandibular first molar area existed submandibular gland fossa and the mean depth was （ 1.46 ± 0. 69） mm. The presence of submandibular gland in mandibular second molar area was about 83.3% （30/36） and the mean depth was （1.84 ±0. 86） mm. There was no significant difference of different gender in the depth of submandibular gland fossa. The anatomical structure of the submandibular gland exhibits great variation. Clinicians should be fully aware of the importance when implanted in the mandibular posterior area.