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An anatomical study of the buccinator muscle fibres that extend to the terminal portion of the parotid duct, and their functional roles in salivary secretion

 Hyo-Chang Kang  ;  Hyun-Ho Kwak  ;  Kyung-Seok Hu  ;  Kwan-Hyun Youn  ;  Guang-Chun Jin  ;  Christian Fontaine  ;  Hee-Jin Kim 
 JOURNAL OF ANATOMY, Vol.208(5) : 601-607, 2006 
Journal Title
Issue Date
Adult ; Aged ; Aged, 80 and over ; Cheek ; Dissection ; Facial Muscles/anatomy & histology* ; Facial Muscles/physiology ; Female ; Humans ; Male ; Microtomy ; Middle Aged ; Muscle Fibers, Skeletal/cytology* ; Muscle Fibers, Skeletal/physiology ; Parotid Gland/anatomy & histology* ; Parotid Gland/metabolism ; Salivary Ducts/anatomy & histology* ; Salivation/physiology*
buccinator ; muscle fibres ; parotid duct ; terminal portion
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.
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2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hee Jin(김희진) ORCID logo https://orcid.org/0000-0002-1139-6261
Hu, Kyung Seok(허경석) ORCID logo https://orcid.org/0000-0002-9048-3805
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