FUNCTIONAL SIGNIFICANCE OF THE MANDIBULAR SYMPHYSIS
FUNCTIONAL SIGNIFICANCE OF THE MANDIBULAR SYMPHYSIS
复制标题
DOI：
10.1002/jmor.1051590109
复制
发表时间：
1979-01-01
影响因子：
1.5
通讯作者：
BEECHER, RM
中科院分区：
文献类型：
--
作者：
BEECHER, RM
下颌联合中结缔组织的形态与联合的活动性和机械应力的行为和实验证据相关。对 6 种哺乳动物目（22 种）的联合解剖结构进行了组织学检查。咀嚼周期动力冲程期间压力的行为和实验证据与联合骺结缔组织的位置和方向所暗示的联合压力相对应。这些应力如下：由于力从平衡侧转移到咀嚼侧而导致的联合背腹剪切力；由于下颌闭合肌对齿骨的扭转，导致联合弯曲，导致下缘紧张和上缘受压；由于咀嚼侧的前向应力而导致联合的前后剪切。种间比较表明，食叶动物比食水果或昆虫的动物能抵抗更大的背腹剪切力，但饮食与弯曲或前后剪切力之间不存在相关性。咀嚼叶子显然需要更大的咬合力。
The morphology of connective tissues in the mandibular symphysis was related to the behavioral and experimental evidence for mobility and mechanical stress at the symphysis was studied. The anatomy of the symphysis was examined histologically in 6 mammalian orders encompassing 22 spp. Behavioral and experimental evidence of stress during the power stroke of the chewing cycle correspond with stresses at the symphysis implied by the location and orientation of symphyseal connective tissues. These stresses are the following: dorsoventral shear of the symphysis due to the transfer of force from balancing to chewing sides; bending of the symphysis causing tension along the inferior and compression along superior borders due to torsion on the dentaries from the jaw closing muscles; and antero-posterior shear of the symphysis due to an anteriorly directed stress on the chewing side. Interspecific comparisons suggest that leaf eaters can resist greater dorsoventral shear than fruit or insect eaters, but no correlations exist between diet and bending or antero-posterior shear. Chewing leave apparently requires larger biting forces.