[Consideration to the experimental study on the rapid palatal expansion in the rat].
[Consideration to the experimental study on the rapid palatal expansion in the rat].
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大鼠腭部快速扩张实验研究的思考[J].
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
G. Hirai
中科院分区：
文献类型：
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作者：
O. Takahashi;N. Shimizu;T. Iwasawa;G. Hirai
本研究旨在探讨快速扩腭后腭中缝骨形成的最佳位置和方法。选用8周龄Wistar大鼠10只，在切牙连线、腭前孔前端、腭前孔平分线和第一磨牙连线处，观察正常腭中缝的结构。用上颌切牙扩弓器，以60 g的弹簧负荷，对8周龄Wistar大鼠的腭中缝进行了6天的侧向扩弓。斩首后，拍摄颅骨软X线片，观察缝合情况。取出上颌骨，制备脱钙切片（额切片）。将它们用苏木精和伊红染色用于显微镜检查。在4个水平上观察腭中缝，并绘制如下线：穿过切牙中心的线（A）、穿过腭前孔前端的线（B）、穿过腭前孔中心的线（C）和穿过第一磨牙中心的线（D）。在A和B的相对边缘，缝线由两层组成;成骨细胞层和互连Sharpey纤维层。在C时，缝线弯曲，Sharpey纤维层由纵向和横向纤维组成。（250字处删节）
The purpose of this study is to clarify the most suitable position and method to investigate bone formation in the mid-palatal suture after rapid palatal expansion in the rat. 10 of 8 week-old Wistar rats were employed to observe the structure of the normal mid-palatal suture at the line connecting the incisors, the anterior end of the anterior palatine foramen, the line bisecting the anterior palatine foramina, and the line of the 1st molars. A mid-palatal suture of 8 week-old Wistar rats was expanded laterally for 6 days by means of maxillary incisor expansion apparatus with a spring of 60 g load. After beheading, soft X-ray picture of the skull was taken to observe the suture. The maxilla was removed and decalcified sections (frontal section) were prepared. They were stained with hematoxylin and eosin for microscopy. The mid-palatal suture was observed at 4 levels to the lines drawn as follows; the line running through the centers of incisors (A), the line running the anterior ends of the anterior palatine foramen (B), the line running through the center of the anterior palatine foramen (C), and the line running through the centers of the 1st molars (D). At the opposing margins of A and B, the suture was composed of two layers; the layer of osteoblasts and the layer of interconnecting Sharpey's fibers. At C, the suture was curved and the layer of Sharpey's fibers were made up with longitudinal as well as transverse fibers.(ABSTRACT TRUNCATED AT 250 WORDS)