Morphological Study of the Parotid Duct. The Running Course in the Buccal Muscle and the Morphology of the Orifice of the Parotid Duct.

Amano, Kaori; Shiga, H.; Sukekawa, Reiki; Itoh, Ichizoh

doi:10.2330/joralbiosci1965.44.515

Cited by 4 publications

(3 citation statements)

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“…H. Kutta described the antimicrobial defense mechanism of the human parotid duct in transporting salivary secretions into the oral cavity, 2006 (3). Findings in our present study using fetuses ranging from five to ten months of age substantiate the view that the buccinator muscle plays a major role in preventing the reflux of salivary secretion by assisting the contraction of the parotid duct opening (4). They also support our proposal that the sphincter function of the buccinator is developed at as early as five months of gestation in humans.…”

Section: Discussionsupporting

confidence: 90%

Morphological study of the parotid duct in human fetuses with special emphasis on the relationship between the buccinator muscle and the parotid duct

Amano¹,

Moriyama

Shimada

et al. 2009

J. Med. Invest.

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, were prepared. They consisted of the following ages : three five-month-old fetuses, seven sixmonth-old fetuses, six seven-month-old fetuses, eight nine-month-old fetuses, and six ten-month-old fetuses. Their ages were determined by measuring their body lengths. These specimens were perfused with 10% formaldehyde fixative. After removing the facial skin, each parotid duct from the entrance of the buccinator muscle to the opening of the oral cavity along with its surrounding buccinator muscle was removed en bloc (Fig. 1).Twenty specimens were cut open from the entrance of the buccinator muscle toward the opening of the oral cavity under a dissection light microscope for morphological examination prior to scanning electron microscope (SEM) observation. After conductive staining with tannin-osmium (1%) solution, we dehydrated them with alcohol and used the tbutyl alcohol freeze drying method for preparing MINI REVIEWMorphological study of the parotid duct in human fetuses with special emphasis on the relationship between the buccinator muscle and the parotid duct

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Section: Discussionsupporting

confidence: 90%

Morphological study of the parotid duct in human fetuses with special emphasis on the relationship between the buccinator muscle and the parotid duct

Amano¹,

Moriyama

Shimada

et al. 2009

J. Med. Invest.

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“…Amano et al [142] studied the relationship between the parotid duct and buccal muscle, and investigated the structures around the orifice via scanning electron microscopy. The duct showed circular mucoepithelial rugae on the inner luminal surface before entering the buccal muscle.…”

Section: Protective Mechanism Of the Orifice Of The Stensen's Ductmentioning

confidence: 99%

“…In some cases, the orifice of the parotid duct showed a drawstring purse-shaped morphology owing to the longitudinal torus. They suggested that the morphological features of the parotid duct adjust the salivary flow, preventing the countercurrent of the liquid [142]. Furthermore, based on scanning electron microscopy and histological investigations, Amano et al [143] suggested that the area of the duct penetrating the buccinator muscle plays a role in regulating salivary passage through the contraction of the surrounding buccinator muscle fibers.…”

Section: Protective Mechanism Of the Orifice Of The Stensen's Ductmentioning

confidence: 99%

Etiology of Pneumoparotid: A Systematic Review

Yoshida¹

2022

Preprint

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Pneumoparotid describes the presence of retrogradely insufflated air within the Stensen's duct and/or parotid gland. It is a rare condition with variable causative factors. This study aimed to clarify the clinical characteristics of pneumoparotid; reports in all languages were evaluated fol-lowing the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement 2020. A literature search was conducted using electronic medical databases (PubMed, Scopus, Web of Science, EBSCO, Ovid, Google Scholar, SciElo, LILIACS, and others) from 1890 to June 30, 2022. One hundred and seventy patients (mean age; 28.4 years) from 126 studies were reviewed. Common symptoms included swelling (84.7%) and pain (35.9%). Characteristic findings were crepitus in the parotid region (40%) and frothy saliva from the orifice (39.4%). Common etiologies included abnormal habits such as blowing out the cheeks (23.5%), idiopathic (20%), self-induced (15.9%), playing wind instruments such as trumpets or flutes (8.8%), and diseases inducing coughing or sneezing (8.2%). Treatments included antibiotic therapy (30%), behavioral therapy to avoid continuing causative habits (25.9%), psychiatric therapy (8.2%), and surgical procedures (8.2%). Treatment should be individualized based on the etiology. However, the etiology was not identified in 20% of patients. Further detailed data from larger samples are necessary to better understand and improve the recognition of this entity.

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