Modulation of the masticatory path at the mandibular first molar throughout the masticatory sequence of a hard gummy jelly in normal occlusion
Modulation of the masticatory path at the mandibular first molar throughout the masticatory sequence of a hard gummy jelly in normal occlusion
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DOI：
10.1179/2151090314y.0000000020
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发表时间：
2015-10-01
影响因子：
1.6
通讯作者：
Miyawaki, Shouichi
中科院分区：
文献类型：
--
作者：
Kitashima, Fumiaki;Tomonari, Hiroshi;Miyawaki, Shouichi
目的：在这项研究中，作者研究了正常咬合的成年人在自然咀嚼硬软糖时下颌第一磨牙咀嚼路径的调节。方法：将下颌第一磨牙的单侧咀嚼顺序分为3个阶段，分别在正中下2.0、3.0、4.0、5.0 mm垂直切面和矢状面对工作侧第一磨牙的咀嚼路径进行分析。结果：正位面3.0、4.0、5.0 mm层位的末段合拢角、开合角、周期宽度较初段小、窄，2.0 mm层位变化不大；讨论：下颌第一磨牙的咀嚼路径在大于3.0 mm的切片水平上明显被调节以适应食物性质的变化，而在2.0 mm的切片水平上的咀嚼路径在整个咀嚼过程中保持稳定。
Objective: In this study, the authors investigated the modulation of the masticatory path at the mandibular first molar during natural chewing of a hard gummy jelly in adults with normal occlusion.Methods: The unilateral mastication sequence was divided into three stages, and the masticatory path of the mandibular first molar on the working side was analyzed at 2.0, 3.0, 4.0, and 5.0 mm vertical slice levels below the intercuspation in the frontal and sagittal views.Results: In the frontal view, the closing and opening angles and cycle width of the final stage at 3.0, 4.0, and 5.0 mm slice levels were smaller and narrower than those of the initial stage, although those at the 2.0 mm slice level were little changed.Discussion: Masticatory paths of the mandibular first molar at slice levels greater than 3.0 mm were evidently modulated to adapt to the changing properties of the food, and those at the 2.0 mm slice level remained stable throughout the masticatory sequence.