Temporal bone adaptations in response to protrusive function in juvenile and young adult rhesus monkeys (Macaca mulatta).
Temporal bone adaptations in response to protrusive function in juvenile and young adult rhesus monkeys (Macaca mulatta).
复制标题
幼年和年轻成年恒河猴（Macaca mulatta）的颞骨适应前突功能。
DOI：
10.1093/ejo/6.3.155
复制
发表时间：
1984
影响因子：
2.6
通讯作者：
McNamaraJr,JA
中科院分区：
文献类型：
--
作者：
Hinton,RJ;McNamaraJr,JA
颞骨适应于扩张功能在生长期和非生长期动物中都有描述。在幼年猴子配备了一个功能性矫正器，颞关节组件的显微解剖学变化的离散序列进行了描述。其中最明显的是下颌窝后部区域（窝顶和关节盂后棘）的新骨沉积。在髁突软骨对前伸反应的时间序列中，新骨在矫治器放置后2-6周继续沉积，在8-12周固结成层，并在24周停止。年轻成年动物的反应变化更大，可能幅度降低，并且发生速度较慢。然而，在三分之一的实验样本中观察到与青少年定性相似的反应。结果表明，成骨反应可能是由关节盘后部纤维传递的骨膜张力触发的。由于骨骼适应减少了对翼外肌（8周后）习惯性下颌前摆姿势的需要，椎间盘纤维的张力降低到正常下颌偏移期间的水平，并且消除了进一步成骨的刺激。
Temporal bone adaptations to protrusive function are described in both growing and non-growing animals. In juvenile monkeys fitted with a functional protrusive appliance, a discrete sequence of microanatomical changes in the temporal joint component is described. The most pronounced of these involved the deposition of new bone in the posterior region of the mandibular fossa (fossa roof and postglenoid spine). In a sequence which paralleled in time that of the condylar cartilage response to protrusion, new bone continued to be deposited in weeks 2–6 following appliance placement, was consolidated into layers in weeks 8–12, and had ceased by 24 weeks. The response in young adult animals was much more variable, possibly of reduced magnitude, and occurred at a slower pace. However, a response qualitatively similar to that in juveniles was observed in one-third of the experimental sample. It is suggested that the osteogenic response may be triggered by periosteal tension transmitted by fibres of the posterior portion of the articular disc. As skeletal adaptations reduce the need for habitual anterior posturing of the lower jaw by the lateral pterygoid muscles (after 8 weeks), tension in the disc fibres diminishes to levels present during normal jaw excursions and the stimulus for further osteogenesis is eliminated.