国人分裂颧骨的观察

观察了200个成人颅骨,不完全二分颧骨的出现率最高,完全二分颧骨次之,三分颧骨最少。不完全二分颧骨各缝的出现率不同,其中以后水平缝多见,前水平缝次之,全水平缝更少。本文还对该骨出现的成因进行了探讨。

OBSERVATION ON THE CHINESE ZYGOMATIC BONE

The author observed the zygomatic bone of 400 sides of 200 adult skulls collected in the region of Ying Chuan, Ningxia. The results obtained are summarized as follows: 1. Incidence of incomplete zygomaticum bipartium of unilateral side is a little higher than that of bilateral sides; both of them are 21.5 2.90%. 2. There are differences of the incidence of the sutures of the incomplete zygomaticum bipartium. The orders of them can be arranged as the following: the posterior horizontal suture is the most, the anterior horizontal suture, the second and the complete one, the last. 3. Incidence of the complete zygoticum bipartium is limited, and that of the bilateral sides is a little higher than the unilateral side, but the difference between the left and the right of the unilateral side is not remarkable (u=0.82). 4. Zygomaticum tripartium is rarely seen, only two cases of the right side (1.0 0.5%).