PALATAL EXPANSION - JUST BEGINNING OF DENTOFACIAL ORTHOPEDICS
PALATAL EXPANSION - JUST BEGINNING OF DENTOFACIAL ORTHOPEDICS
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DOI：
10.1016/0002-9416(70)90241-1
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发表时间：
1970-01-01
期刊：
影响因子：
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通讯作者：
HAAS, AJ
中科院分区：
文献类型：
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作者：
HAAS, AJ
2.中切牙的反应与预期的一样，考虑到它们是由弹性横隔纤维连接的。当缝合线打开时，冠部会聚而根部分叉。当冠部接触时，纤维的持续拉动导致根部向其原始轴向倾斜会聚。在这个周期，这通常需要约4个月，这些牙齿的轴向倾角可能动摇多达50度。3.牙槽突弯曲并随上颌骨向外侧移动，而腭突在其游离缘处向后摆动。其效果是牙弓扩张和鼻内容量增加。4.当腭中缝打开时，上颌骨总是向前和向下移动。这可能是由于上颌骨颅缝的位置。Sicherl提请注意这样一个事实，即这些缝合线的方向是这样的。生长的方式将产生向下和向前的上颌骨运动矢量。由于这些分支区缝线通过腭部扩张程序脱离，
2. The central incisors react as expected, considering that they are linked by elastic transseptal fibers. As the suture opens, the crowns converge while the roots diverge. When the crowns come into contact, the continued pull of the fibers causes the roots to converge toward their original axial inclinations. During this cycle, which usually takes about 4 months, the axial inclination of these teeth may vacillate as much as 50 degrees.3. The alveolar processes bend and move laterally with the maxillae, while the palatal processes swing inferiorly at their free margin. The effect is a dental arch expansion and an increase in intranasal capacity. 4. When the midpalatal suture opens, the maxilla always moves forward and downward. This is probably due to the disposition of the maxillocranial sutures. Sicherl calls attention to the fact that these sutures are oriented in such a. manner that growth would produce a downward and forward vector of maxillary movement. Since these hafting zone sutures are disengaged by the palatal expansion procedure, an effect