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Volume 4 No. 3, July 2009 |
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Study on the Arterial Supply of the Parotid Duct in the Crab-Eating Monkey by Corrosion Casting Hiroshi Nakamura(1), Hanie Abdel-Hamid Youssef(2) & Yoko Yamada(1)
Department of Oral and Maxillofacial Surgery, Kobe University School
of Medicine, Hyogo, Japan(1). Department of Anatomy,
Faculty of Medicine, Suez Canal University, Ismailia, Egypt
(Formerly, research fellow at Kobe University School of Medicine,
Japan)(2)
Aim: The aim of this study was to describe the three-dimensional
features of the patterns of nutrient arterial distribution to the
parotid duct in the crab-eating monkey (Macaca fascicularis,
Cynomolgus Monkey). Patients & Methods: We adopted the technique of
acryl plastic injection. A low-viscosity acrylic resin was injected
transcardially. The tissues around the vessels in the head and neck
region were then digested in hot alkali, and the resulting casts
were examined under a binocular dissecting microscope. The lengths
and diameters of the arterial nutrient branches to the parotid duct
were measured using a sliding caliper. Results: 1. Origin. The
arterial supply sources of the duct were seen at three points;
namely, at the origin of the parotid duct (the parotid branches of
the posterior auricular and the superficial temporal arteries, and
submandibular lymph node ramus of the external carotid artery), and
at location slightly posterior to the orifice of the duct, and at
the orifice (the branches to the superior aspect and angularis oris
ramus of the facial artery). 2. Course. The parotid ductal branches
consisted of the supraductal and the infraductal branches. They ran
parallel with the duct, about 0.6 mm above or below the parotid
duct, respectively. Both ductal branches were seen either as
complete along the full length of the duct or as incomplete (partial
defect of the supraductal or the infraductal branch). There were
regular communicating branches between the supraductal and the
infraductal branches. When a part of either ductal branch was
lacking, a branch arising from the opposite fellow crossed over the
duct and supplemented the defective part of the ductal branch. 3.
Termination. From the ductal branches in the periphery of the
adventitia of the duct, small branches were sent off perpendicular
to the duct, making a capillary network (sheath) right under the
epithelium. Conclusion: Understanding the nutrient arterial
distribution to the parotid duct is very important, especially for
the surgical and radiological applications as well as for
comparative purposes among various species. |
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