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首页> 外文期刊>The Journal of Experimental Biology >Three-dimensional loading and growth of the zygomatic arch
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Three-dimensional loading and growth of the zygomatic arch

机译：arch弓的三维加载和生长

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Despite a number of previous biomechanical studies on the zygomatic arch, unanswered questions remain about its three-dimensional loading and growth. Using young miniature swine, we have for the first time recorded strains from both the medial and lateral aspects of the squamosal bone during mastication and masseter muscle stimulation. Strains from the! zygomatic bone flange and zygomatic arch growth data were also obtained from the same animals. A second study on a younger group of animals examined the growth of the zygomatic flange following partial removal of the masseter. Strain data indicated that the squamosal bone is bent out-of-plane and that this pattern of loading is quite different from that of the adjacent zygomatic bone, which experiences much lower strains with little evidence of out-of-plane bending. Surprisingly, strains were higher in the zygomatic flange during contralateral chews contralateral masseter stimulations than during ipsilateral chews/stimulations. These strains proved to arise from movement of the condyle, explaining why partial removal of the masseter had little effect on the growth of the flange. Other growth results indicated an approximately threefold greater rate of subperiosteal deposition on the lateral surface of the squamosal bone than on the zygomatic bone. This difference in growth rate is attributed to the presence of sutures that contribute to the lateral displacement of the zygomatic bone but not the squamosal bone. This explanation does not exclude the possibility that the rapid apposition on the lateral squamosal surface is regulated by the high surface strains that result from out-of-plane bending. [References: 26]
机译：尽管先前有很多关于弓的生物力学研究，但关于其三维负荷和生长的问题仍未得到解答。我们使用幼小微型猪首次记录了咀嚼和咬肌刺激过程中鳞状骨内侧和外侧的应变。从应变！ from骨凸缘和弓生长数据也从相同的动物中获得。对较年轻的一组动物的第二项研究检查了部分摘除咬肌后following骨突缘的生长。应变数据表明，鳞状骨弯曲成平面外，这种载荷模式与相邻骨的载荷模式有很大不同，which骨经历的载荷低得多，几乎没有平面外弯曲的迹象。令人惊讶的是，在对侧咀嚼时，对侧咬肌刺激比在同侧咀嚼/刺激时，flange突缘的应变更高。这些应变被证明是由于the的运动引起的，这解释了为什么部分摘除咬肌对凸缘的生长影响很小。其他生长结果表明，在qua骨侧面上的骨膜下沉积速率比在matic骨上高大约三倍。这种生长速率的差异归因于缝合线的存在，这些缝合线有助于骨的横向移位而不是鳞状骨的横向移位。该解释不排除由平面外弯曲引起的高表面应变来调节在侧方鳞片表面上快速并列的可能性。 [参考：26]

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