Tóm tắt

Objectives: To describe the anatomical characteristics of the main body and the branches of the facial nerve. Subjects and method: A cross-sectional study wa carried out on 30 hemifaces that belong to formalin-treated Vietnamese male and female cadavers. Results: 100% of the sample remained only one facial nerve trunk leaving the stylomastoid foramen was locatedat a depth 28.9 mm on right side, 25.1mm on the left from the skin. In bifurcates at the posterior border of the ramus of the mandible and in 6.7% trifurcation was found. The distance between the angle of the mandible and trifurcation of the facial nerve, mean distance was found to be 40.8 mm in the present study in Vietnamese subjects, whereby 86.6% were between 36 to 50 mm from the angle of the mandible. Conclusions: There is only one facial nerve trunk exit from the stylomastoid foramen, the trunk length 14.1 mm, diameter 2.5 mm, average number of division is 2.1. The angle formed by the superior and inferior division appears to be almost perpendicular (91.20), and mean superior division length is 15.2 mm which is notably shorter than inferior division (23.6 mm). * Keywords: Facial nerve; Angle of mandible; Main trunk.

Abstract

Objectives: To describe the anatomical characteristics of the main body and the branches of the facial nerve. Subjects and method: A cross-sectional study wa carried out on 30 hemifaces that belong to formalin-treated Vietnamese male and female cadavers. Results: 100% of the sample remained only one facial nerve trunk leaving the stylomastoid foramen was locatedat a depth 28.9 mm on right side, 25.1mm on the left from the skin. In bifurcates at the posterior border of the ramus of the mandible and in 6.7% trifurcation was found. The distance between the angle of the mandible and trifurcation of the facial nerve, mean distance was found to be 40.8 mm in the present study in Vietnamese subjects, whereby 86.6% were between 36 to 50 mm from the angle of the mandible. Conclusions: There is only one facial nerve trunk exit from the stylomastoid foramen, the trunk length 14.1 mm, diameter 2.5 mm, average number of division is 2.1. The angle formed by the superior and inferior division appears to be almost perpendicular (91.20), and mean superior division length is 15.2 mm which is notably shorter than inferior division (23.6 mm). * Keywords: Facial nerve; Angle of mandible; Main trunk.