Vilmann H, Moss M L
Gegenbaurs Morphol Jahrb. 1985;131(3):329-35.
The present paper considers the significance of interosseous flexions of the palatal complex in the process of orthocephalization of the rat skull between 7 and 60 d after birth. The study is based on a sample of 25 female rats who have been X-rayed at 7, 14, 30, and 60 d with subsequent analysis of the photographs obtained. During this period the constituents of the bony palate, i.e. the palatine bone, the palatal process of maxilla and the palatal part of premaxilla grow steadily but with decreasing rate of increase with age. The premaxilla grows the most, while the palatal bone grows the least. The angle between the cranial base and the palatal plane decreases, i.e. the rat skull becomes more orthocranial with age. At the same time, the palate becomes more orthopalatal, primarily by an increase in the angle between the palatine bone and maxilla. As the angle between the cranial base and the palatine bone after 14 d increases, i.e. rotates in the opposite direction of the palatal plane, it may be concluded that the process of orthocephalization in this period is caused by the deflexion of the angle between the palatine bone and maxilla, while it before 14 d is caused by a combination of an interosseous deflexion in the palate and an upwards rotation of the palatine bone relative to the cranial base.
本文探讨了出生后7至60天大鼠颅骨正颅化过程中腭复合体骨间弯曲的意义。该研究基于对25只雌性大鼠的样本，在7天、14天、30天和60天时对其进行X射线检查，并对所得照片进行后续分析。在此期间，硬腭的组成部分，即腭骨、上颌骨腭突和前颌骨腭部稳步生长，但生长速度随年龄增长而下降。前颌骨生长最多，而腭骨生长最少。颅底与腭平面之间的角度减小，即大鼠颅骨随着年龄增长变得更加正颅。同时，腭部变得更加正腭，主要是通过腭骨与上颌骨之间角度的增加实现的。由于14天后颅底与腭骨之间的角度增加，即朝着与腭平面相反的方向旋转，可以得出结论，这一时期的正颅化过程是由腭骨与上颌骨之间角度的弯曲引起的，而在14天之前则是由腭部骨间弯曲以及腭骨相对于颅底的向上旋转共同引起的。
