颅底发育的x线研究

本文通过1000例头颅正侧位X线片对颅底发育进行了研究,测量了颅底宽径和颅底长径,并计算了颅宽颅底宽指数和颅长颅底长指数。在7岁前,颅底长径及颅底宽径无性别差异;7岁后,男性大于女性;17岁时,基本达到成人水平。在14岁前的儿童,颅底宽径增长快于头颅宽径,故颅宽颅底究指数随年龄增长而增大;14岁后该指数不随年龄变化。颅底长径与头颅长径发育曲线基本相同,故颅长颅底长指数没有年龄发育特征。

RADIOLOGICAL STUDY OF THE SKULL BASE DEVELOPMENT

The development of the skull base of 1000 cases was studied with skull radiographies. The length of the skull base and cranium were measured and the indexes were calculated. The same measurement and calculation were used to determine the width of the skull base and the cranium. The main results are as follow, The width and length of the skull base are similar in both sexes before 7 years of age, larger in boys than in girls after 7 years and almost never increase at 17 years. Before 14 years, the width of the skull base increases quicker than that of the cranium. Therefore, the indexes are also increased with age, but with no longer increase with age after 14 years. The index of length of the craniumskull base does not increase with age because the development curves of the length of the cranium and skull base are similar.