Effects of feeding a soft diet and subsequent rehabilitation on the development of the masticatory function
Effects of feeding a soft diet and subsequent rehabilitation on the development of the masticatory function
复制标题
DOI：
10.1111/joor.12248
复制
发表时间：
2015-04-01
影响因子：
2.9
通讯作者：
Yoshida, N.
中科院分区：
文献类型：
--
作者：
Fujishita, A.;Koga, Y.;Yoshida, N.
有人认为，喂软食可能会抑制咀嚼功能的正常发育。然而，这种饮食习惯改变的后果尚未完全阐明。因此，本研究的目的是确定软饮食是否会阻碍咀嚼功能的发展以及是否存在咀嚼系统编程的关键时期。为了检验这些假设，我们使用三维颌运动跟踪装置和颌肌肌电图（EMG）来分析小鼠的咀嚼功能变化。 Jcl：ICR小鼠分为三组，正常组喂硬食，功能低下组喂软食，康复组先喂软食后改为硬食。我们的结果表明，与正常组相比，咀嚼周期后期关闭阶段（咬合阶段）的偏移和持续时间以及咬肌肌电图活动不仅在功能低下组中减少，而且在康复组中也减少。这些结果表明，在动物生长期间饲喂软质饲料会阻碍咀嚼模式的优化和适当咀嚼功能的获得，并且在将饲料从软质改为硬质之前很长一段时间内没有观察到咀嚼功能的追赶效应。总之，咀嚼功能只有通过学习过程，例如咀嚼各种不同质地的食物，才能得到充分发展。
It has been suggested that feeding a soft diet could possibly inhibit normal development of the masticatory function. However, the consequences of such changes in the alimentary habits have yet to be fully clarified. Therefore, the aim of this study was to determine whether a soft diet prevents the development of masticatory function and whether a critical period for programming the masticatory system exists. To examine these hypotheses, we used a three-dimensional jaw-movement tracking device and jaw muscle electromyography (EMG) to analyse masticatory function changes in mice. Jcl:ICR mice were divided into three groups, with the normal group fed a hard diet, the hypofunctional group fed a soft diet, and the rehabilitation group first fed a soft diet that was then changed to a hard diet. Our results showed that the excursion and duration of late-closing phase (occlusal phase) of the chewing cycle and EMG activity in the masseter muscle were not only reduced in the hypofunctional but also in the rehabilitation group as compared with the normal group. These results suggest that optimisation of the chewing pattern and acquisition of appropriate masticatory function are impeded by feeding a soft diet during the animal's growth period and that no catch-up effect of the masticatory function is observed when there is a prolonged period of time prior to changing the diet from soft to hard. In conclusion, masticatory function can only be fully developed through a learning process such as exposure to chewing various kinds of foods with different food textures.