Investigation about the Role of Complete Denture in Swallowing Motor Function of Edentulous

本研究的目的是为了探讨全口义齿的义齿弓在吞咽功能中起到什么样的作用。制作可摘除义齿牙弓的全口义齿，同步测量咬合力、舌压、肌肉活动度(咬肌、舌骨上肌组)、下颌活动度、喉头抬高。吞咽条件为直接吞咽(水、布丁)和自由消化吞咽(咸牛肉)的时间。1.肌肉活动只影响咬肌活动的最大值，而义齿弓的活动变大。在肌肉活动时间方面，咬肌组和舌骨上肌组不受影响。在受试食物中，咬肌和舌骨上肌组在腌牛肉中的活动质量显著较大。2.同压舌压最大值影响到上颌外侧，而对于舌压，义齿牙弓的压力变大。在测试食物的差异中，咸牛肉的舌压大小明显较大。只有在吞食水和吞食布丁时，舌压最大时间和喉头抬高的时间差受义齿牙弓的存在影响，舌压部分的影响不被认识。

The purpose of this research is for the artificial teeth arch of the complete denture to investigate what kind of role is played in a swallowing function. The complete denture, which can remove the artificial teeth arch for an experiment, was produced, and occlusal force, tongue pressure, muscle activity (masseter, suprahyoid-muscles group), the mandibular movement, and the laryngeal elevation were measured synchronously. Swallowing conditions were considered as the time of directions swallowing (water, pudding) and free digestion swallowing (corned beef).1.Muscle activityOnly maximum of masseter activity was influenced, and the activity with the artificial teeth arch became large. As for muscle activity time, masseter and suprahyoid-muscles group were not influenced. In test foods, masseter and suprahyoid-muscles group had the significantly large active mass in corned beef.2.Tongue pressureMaximum of tongue pressure was influenced in the lateral part of the palate, and, as for tongue pressure, the pressure with the artificial teeth arch became large. In the difference in test foods, the size of the tongue pressure of corned beef was significantly large. Only in water swallowing and pudding swallowing, the difference of the time at the time the tongue pressure maximum and laryngeal elevation was influenced by the existence of the artificial teeth arch, and the influence by the part of tongue pressure was not recognized.