The relationship between the morphology and function of various structures in the maxillofacial in children with malocclusion of deciduous dention

乳牙错牙合儿童颌面部各结构形态与功能的关系

基本信息

批准号：
08457577
负责人：
AKASAKA Morito
金额：
$ 0.9万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

For the normal development of occlusion, both the morphology and function of the various structures in the maxillo facial must develop synchronously. There are several reports on the relationship between the type of occlusion, morphology and function of various structures in the maxillo facial in the case of adults with permanent dention ; however, there are no reports in the case of children with deciduous dentition. In this study, we performed a three-dimensional morphological analysis of maxillo facial morphology as well as tooth arrangement in children with normal occlusion and anterior cross bite. The results indicate that the facial patterns of children with anterior cross bite show some distinct characteristics from those of children with normal occlusion. In order to analyze the relationship between the type of occlusion and the masticatiory performance of children with deciduous dentition. The results indicate that the occlusal contact in children with open bite is smaller than that in children with normal occlusion and that the masticatiory performance is poorer in children with open bite and anterior crossbite. There was a positive correlation between the masticatiory performance and the occlusal contact in children with normal occlusion, open bite and deep bite, while no such correlation was found between the two in children with anterior cross bite. Furthermore, electromyograms of the masseter and temporalis muscles of children with deciduous dentition were examined using a simplified technique in order to analyze the activities of the muscles of mastication during sleep. Occiusal contact was observed even in children with temporary teeth during sleep, and synchronous activity of the temporalis and masseter muscles was observed.

咬合的正常发育需要上颌面部各结构的形态和功能同步发育。关于成人恒牙的咬合类型、上颌面部各种结构的形态和功能之间的关系有一些报道；然而，目前还没有关于乳牙列儿童的报道。在这项研究中，我们对正常咬合和前牙反合的儿童的上颌面部形态和牙齿排列进行了三维形态学分析。结果表明，前牙反咬合儿童的面部形态与正常咬合儿童的面部形态表现出一些明显的特征。目的分析乳牙列儿童咬合类型与咀嚼性能的关系。结果表明，开牙合儿童的咬合接触比正常牙合儿童的牙合接触小，开牙合和前牙反牙合儿童的咀嚼功能较差。正常咬合、开牙合、深覆牙合儿童的咀嚼能力与咬合接触呈正相关，而前牙反牙合儿童则两者之间不存在相关性。此外，使用简化技术检查乳牙列儿童的咬肌和颞肌肌电图，以分析睡眠期间咀嚼肌的活动。即使对于有临时牙齿的儿童，在睡眠期间也观察到了咬合接触，并且观察到了颞肌和咬肌的同步活动。