THE ANATOMY OF THE BONY PART OF THE HUMAN EXTERNAL NOSE IN THE CHINESE / 解剖学报

ABSTRACT

The bony part of the external nose was observed and measured in 150 Chinese adult skulls (male 100, female 50), The results are as follows.1. The nasion consists of the upper end of the nasal bone and the nasal part of the frontal bone. It is the anterior wall of the frontonasal canal. The average thickness of this wall is 8.08?0.11 mm.2. Features of the nasal bone 144 cases (288 sides, 96.00％) are oblong and 4 cases (8 sides, 2.67％) are triangular in shape, in 2 cases (4 sides, 1.33％) the right sides are oblong and the left sides are triangular in shape. The length, width and thickness of the nasal bone were measured.3. The frontal process of the maxilla, according to the feature and clinical importance of the topographical characteristics, can be divided into upper, middle and lower portions. (1) The upper portion is a somewhat flat bony process, its anterior surface is flat and posterior surface is rough, which related to the ethmoid cell closely. The average width and thickness of this portion are 8.45?0.06mm and 5.72?0.09mm respectively. (2) The middle portion is the surgical area of the nasolacrimal fistulation. The average width of the part anterior to the anterior lacrimal crest (nasal part) is 6.77?0.05mm; and the average width of the part posterior to the crest (lacrimal part) is 4.97?0.04mm. The average thickness of the middle point of the anterior lacrimal crest is 4.68?0.08mm. (3) The lower portion is the transitional area of the frontal process and the corpus of the maxilla. It is a three-facet pyramid with an obtuse sulcus on its anterior lateral surface the nasofacial sulcus, which is the landmark between the external nose and face. The average width from the lower end of the nasomaxillary suture to the bottom of the sulcus is 8.16?0.04mm. The average thickness is 1.70?0.02mm.4. The margin of the piriform aperture (a) The upper part of the margin formed by the lower border of the nasal bone, the upper border of the upper lateral cartilage of the nose digs behind it and joins each other by a syndesmosis; (b) the width of the lateral part of this margin was measured from the free border of the margin to the anterior end of the inferior turbinate, the average width is 2.62?0.07mm; (c) the lower margin of the piriform aperture and the anterior nasal spine, according to the anthropological classification, were observed and their clinical significance were discussed.