It is divided into three parts: frontal phosphorus, orbital and nose Ministry. Before it and Ethmoid bone and nasal bone Connected with the Parietal bone to be connected. The frontal sinus is located in the front and lower part of the frontal bone cavity 。 ① Frontal scale: It is a scoop shaped or shell shaped flat bone, containing a cavity called frontal sinus;
② Orbit: a thin horizontal bone plate extending backward to form the superior orbital wall;
③ Nose: It is located between the two sides of the orbit, in the shape of a horseshoe, and the notch is the ethmoidal notch.
1. The u values of the maximum width of the frontal bone, the width between the coronal points, the height of the frontal curvature, the angle of the frontal curvature and the angle of the frontal inclination are all less than 1.96, and there is no significant gender difference. The u values of the minimum width of the frontal bone, the sagittal chord of the frontal bone, the sagittal arc of the frontal bone, the frontal lateral angle, the tilt angle of the frontal scale, and the tilt angle of the lower part of the frontal bone are all greater than 1.96, with significant gender differences.
2. Because the eyebrow arch of men is thicker than that of women, and the frontal bone inclines backward, and the frontal bone convexity is more uniform, the frontal tilt angle, frontal scale tilt angle, and lower frontal bone tilt angle of men are larger than those of women, and the sex difference is significant. The results obtained in this paper are basically consistent with Hao Rukang's and Jia Lanpo's statements on the gender difference of frontal bone.
3. The average frontoparietal width index was 66.34 for men and 60.20 for women, indicating that the male forehead was wider than the female.
4. The average value of the frontal bone curvature index is 88.13 for men and 87.56 for women. The smaller the index, the larger the bone curvature. It can be seen that the male frontal bone curvature is smaller than the female, which is basically consistent with the morphological observation of the frontal bone.
5. The frontal lateral angle, frontal bone tilt angle and frontal scale tilt angle measured in this paper are compared with those measured in Qingdao area. The frontoparietal width index, frontal transverse index and frontal curvature index measured in this paper have no significant difference compared with the skull index of modern people in Xi'an.
