EFFECT OF BONE STRAIN ON CORTICAL BONE-STRUCTURE IN MACAQUES (MACACA-MULATTA)
EFFECT OF BONE STRAIN ON CORTICAL BONE-STRUCTURE IN MACAQUES (MACACA-MULATTA)
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DOI：
10.1002/jmor.1051670102
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发表时间：
1981-01-01
影响因子：
1.5
通讯作者：
HYLANDER, WL
中科院分区：
文献类型：
--
作者：
BOUVIER, M;HYLANDER, WL
食物的稠度显著影响咀嚼时下颌骨的骨张力水平。研究人员对两组猴子的下颌骨组织进行了检查，以测试吃硬食物和吃软食物的影响。一组恒河猴（M. mulatta）被喂食商业准备的硬饼干。第二组饲喂软糖稠度的软性饮食。两种饮食对正常生长发育都有足够的营养。作为其他影响皮质骨结构的因素的对照，我们检查了腓骨形态学。试验结束时，取两组小鼠下颌骨和腓骨组织标本，测定二次哈弗氏骨的存在量。测定两组大鼠下颌形态部位M2深度和腓骨前后径，并进行比较。软性饮食猴子的下颌骨重塑程度较低。有大片未重塑的骨和常见的骨吸收间隙。饮食困难的猴子在其下颌骨中显示出更广泛的二次哈弗氏重塑证据。饮食困难的猴子下颌骨较深。两组腓骨的平均直径相似，显示出相似的继发性重构水平。在硬食猴子中，较高的下颌骨重塑水平可能代表了一种适应性反应，以移除和替换由于摄入和咀嚼硬食物而产生的较高压力水平而疲劳的下颌骨。在硬食组中，下颌M2的深度更大，显然代表了对摄入和咀嚼硬食相关的高压力水平的适应性反应。
The consistency of food significantly affects levels of bone strain in the mandible during mastication. Mandibular bone histology was examined to test the effects of a diet of hard food compared to a diet of soft food in 2 group of monkeys. One group of rhesus macaques (M. mulatta) was fed a diet of commercially prepared hard biscuits. The 2nd group was fed a soft diet the consistency of fudge. Both diets were nutritionally adequate for normal growth and development. As a control for other factors influencing cortical bone structure, fibular morphology was examined. At the end of the test period, mandibular and fibular tissue samples from the 2 groups were prepared to determine the amount of secondary Haversian bone present. Mandibular depth at M2 [mandibular morphological site] and fibular anteroposterior diameter were measured and compared between the 2 dietary groups. The soft-diet monkeys showed low levels of remodeling in their mandibles. There were large patches of unremodeled bone and resorption spaces were common. The hard-diet monkeys exhibited more extensive evidence of secondary Haversian remodeling in their mandibles. The hard-diet monkeys had deeper mandibles. The fibulae from the 2 groups had similar mean diameters and showed comparable levels of secondary remodeling. The higher mandibular bone remodeling levels in the hard-diet monkeys may represent an adaptive response to remove and replace fatigued mandibular bone due to higher stress levels associated with the ingestion and mastication of hard foods. Greater depth of the mandible at M2 found in the hard diet group apparently represents an adaptive response to higher stress levels associated with the ingestion and mastication of hard foods.