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

本研究旨在探讨全口义齿之人工牙弓在吞咽功能上扮演何种角色。制作可拔除人工牙弓的全口义齿进行实验，并同步测量咬合力、舌压、肌肉活动（咬肌、舌骨上肌群）、下颌运动和喉上举。吞咽条件被认为是方向吞咽（水、布丁）和自由消化吞咽（咸牛肉）的时间。1.肌肉活动只有咬肌的最大活动受到影响，并且活动随着人工牙弓的增大而增大。咬肌和舌骨上肌组的肌肉活动时间无明显变化。在供试食物中，嚼肌和舌骨上肌群在咸牛肉中具有显著大的活动质量。2.舌压舌压最大值受腭侧部影响，舌压随着人工牙弓的增大而增大。在测试食物的差异中，咸牛肉的舌头压力的大小显着较大。只有吞咽水和吞咽布丁时，舌压最大值和喉上抬的时间差受人工牙弓的影响，舌压部位的影响不明显。

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.