EXPERIMENTAL AND POST-EXPERIMENTAL RESPONSE TO ANTERIORLY DIRECTED EXTRA-ORAL FORCE IN YOUNG MACACA NEMESTRINA
EXPERIMENTAL AND POST-EXPERIMENTAL RESPONSE TO ANTERIORLY DIRECTED EXTRA-ORAL FORCE IN YOUNG MACACA NEMESTRINA
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DOI：
10.1016/0002-9416(79)90278-1
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发表时间：
1979-01-01
影响因子：
3
通讯作者：
SHAPIRO, PA
中科院分区：
文献类型：
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作者：
JACKSON, GW;KOKICH, VG;SHAPIRO, PA
对4名健康青年M.奈梅斯特里纳猴通过头影测量、组织学和大体技术相结合，对实验、保留和后保留的改变进行了评价。根据本研究的结果，可以得出以下结论：1.在对上颌骨施加向前指向的口外力后，所有上颌骨周围缝都会发生颅骨重塑。重塑量似乎与缝线与施力系统的距离和方向成比例。2.在实验期间，上颌复合体表现出明显的前向定位和少量的逆时针旋转。3.对上颌骨施加口外力，不仅在骨缝边缘，而且在骨本身的外表面，都会产生骨的补偿性沉积和吸收。4.有可能实验性的矫正器通过改变颅骨的骨膜将其效果传递到邻近上颌骨的面骨。5.上颌骨复合体的实质性重新定向发生在主动力终止之后，并且复发或重新定向的程度与稳定的长度成正比。6.在最短的稳定期后，通过牙周韧带的牙列经历大约四倍于通过其缝合关节的面骨的复发。7.施加于颅面复合体的口外力通过上颌骨和相关的面中部骨传递，导致诸如蝶骨的软骨结合等深部颅骨结构的变化。8.口外牵引导致的上颌骨前移对下颌骨和颞下颌关节的影响很小。9.缝合韧带中窦状血管的数量在受到张力的缝合处趋于增加。
An anteriorly directed extraoral force was applied to the maxillas of four healthy young M. nemestrina monkeys. Experimental, retention, and postretention alterations were evaluated through a combination of cephalometric, histologic, and gross techniques. In view of the results of the present study, the following conclusions can be made: 1. Skeletal remodeling occurs in all circummaxillary sutures following the application of an anteriorly directed extraoral force to the maxilla. The amount of remodeling appears to be proportional to a suture's distance from and orientation to the applied force system. 2. The maxillary complex exhibited a marked anterior positioning with a small amount of counterclockwise rotation during the experimental period. 3. The application of an extraoral force to the maxilia produces compensatory deposition and resorption of bone, not only at the sutural margins but also at the external surface of the bones themselves. 4. It is possible that the experimental appliance transmits its effect to the facial bones adjacent to the maxilla through an alteration in the skull's periosteal envelope. 5. A substantial reorientation of the maxillary complex occurs following the termination of active force, and the degree of relapse or reorientation is directly proportional to the length of stabilization. 6. The dentition, through the periodontal ligament, undergoes approximately four times as much relapse as do the facial bones through their sutural articulations, following a minimal period of stabilization. 7. Extraoral forces applied to the craniofacial complex are transmitted through the maxilla and related midfacial bones, resulting in changes in such deep cranial structures as the cartilaginous synchondroses of the sphenoid bone. 8. Anterior displacement of the maxilla by extraoral traction appears to have a minimal effect on the mandible and the temporomandibular joint. 9. The number of sinusoidal vessels in the sutural ligament tends to increase in those sutures subjected to a tensional force.