Han S-S, Hwang J-J, Park C-S
1 Department of Dental Hygiene, College of Health Science, Eulji University, Seongnam, Republic of Korea.
Dentomaxillofac Radiol. 2014;43(7):20140115. doi: 10.1259/dmfr.20140115. Epub 2014 Jun 24.
The temporal crest canal (TCC) is a variation of the bony canal with two accessory foramina that correspond to an entrance and an exit on the mandibular ramus. This study investigated the anatomical characteristics of the TCC using CBCT.
The study population consisted 446 patients who had undergone CBCT. Sagittal, cross-sectional and three-dimensional images were evaluated for the presence of a TCC. The canals were classified into two types according to the configuration, and the location of the posterior accessory foramen of the TCC was also recorded.
6 TCCs were present in 4 of 446 patients (0.90% of the total population). All of the TCCs were observed in males, and all of the posterior foramina were located superior to the mandibular foramina on the medial aspect of the mandibular ramus. There were five noticeably curved and increasingly narrow canals (Type 1) and one slightly curved and uniformly wide canal (Type 2).
Precise knowledge of the TCC is clinically important for suitable local anaesthetic nerve block and the planning of surgical procedures that involve the mandibular ramus. Three-dimensional images of CBCT data are particularly effective for confirming the presence of this variation.
颞嵴管（TCC）是一种骨管变异，有两个副孔，分别对应下颌支上的一个入口和一个出口。本研究使用锥形束计算机断层扫描（CBCT）研究TCC的解剖特征。
研究人群包括446例接受过CBCT检查的患者。对矢状面、横断面和三维图像进行TCC存在情况的评估。根据形态将这些管分为两种类型，并记录TCC后副孔的位置。
446例患者中有4例（占总人群的0.90%）存在6个TCC。所有TCC均在男性中观察到，且所有后孔均位于下颌支内侧下颌孔上方。有5个明显弯曲且逐渐变窄的管（1型）和1个轻度弯曲且宽度均匀的管（2型）。
准确了解TCC在临床上对于合适的局部麻醉神经阻滞以及涉及下颌支的手术规划很重要。CBCT数据的三维图像对于确认这种变异的存在特别有效。
