Kang Hyo-Chang, Kwak Hyun-Ho, Hu Kyung-Seok, Youn Kwan-Hyun, Jin Guang-Chun, Fontaine Christian, Kim Hee-Jin
Division of Anatomy and Developmental Biology, Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
J Anat. 2006 May;208(5):601-7. doi: 10.1111/j.1469-7580.2006.00574.x.
Until now there has been no definitive anatomical study describing the area where the parotid duct enters the buccinator muscle. In this study, we performed anatomical and histological examinations to investigate the relationship between the parotid duct and the buccinator muscle. Thirty specimens (including the buccinator and the terminal portion of the parotid duct) were obtained from embalmed Korean cadavers. Dissection was performed on 22 of these specimens, and the remaining eight specimens were prepared for histological examination and stained with haematoxylin-eosin or Gomori trichrome. In all specimens, small, distinct muscle fibres originating from the buccinator muscle extended to and inserted into the terminal portion of the parotid duct. The topography of these fibres varied, and we classified them into three categories according to where they originated. Type I buccinator muscle fibres, which inserted into the terminal portion of the parotid duct, originated simultaneously from the anterior and posterior aspects of the duct (ten cases, 45.5%). Type II fibres originated from the anterior aspect of the duct and inserted into the anterior side of the duct (seven cases, 31.8%). Type III fibres originated from the posterior aspect of the parotid duct and ran anteriorly toward the duct (five cases, 22.7%). These results were confirmed in the histological examination of all eight specimens. Based on these findings, we have proposed a tentative description of the physiological role of the buccinator muscle fibres in salivary secretion and in the formation of the sialoliths.
到目前为止，尚无确切的解剖学研究描述腮腺导管进入颊肌的区域。在本研究中，我们进行了解剖学和组织学检查，以探究腮腺导管与颊肌之间的关系。从防腐处理的韩国尸体上获取了30个标本（包括颊肌和腮腺导管的末端部分）。对其中22个标本进行了解剖，其余8个标本则准备用于组织学检查，并进行苏木精-伊红染色或Gomori三色染色。在所有标本中，源自颊肌的细小、明显的肌纤维延伸至腮腺导管末端并插入其中。这些纤维的形态各异，我们根据其起源部位将它们分为三类。插入腮腺导管末端的I型颊肌纤维同时起源于导管的前后两侧（10例，45.5%）。II型纤维起源于导管的前侧并插入导管的前侧（7例，31.8%）。III型纤维起源于腮腺导管的后侧并向前朝向导管延伸（5例，22.7%）。所有8个标本的组织学检查均证实了这些结果。基于这些发现，我们对颊肌纤维在唾液分泌和涎石形成中的生理作用提出了初步描述。
