MASTICATORY EVALUATING METHOD FOR COMPLETE DENTURE WEARERS

为建立客观评价咀嚼功能的方法，对下颌运动技能进行了研究。受试者是8名健康的全牙，一名模拟患者用50微米的垂直咬合干涉粘接临时金属冠。在2赫兹的声音信号下进行下颌轻击动作。用SIROGNATHO Analyzer III(Kanops，Co)同步记录下颌运动轨迹和咀嚼肌肌电信号。结果表明，8例健康全牙下颌运动周期时间和颞肌肌电的偏差均较小。另一方面，与模拟患者的其他十次中风相比，从第一次中风到第十次中风的周期时间偏差是非常不稳定的。提示下颌运动周期时间偏差可作为评价下颌运动控制能力的有效参数。…关系在咀嚼3克花生的同时，分析了在有和没有实验舌板(ELP)的情况下舌头和下颌运动之间的更多IP。此外，还通过筛选法对咀嚼效率进行了评价。分别在植入ELP后即刻、1、3、6、12、24、48h用超声诊断仪和SIROGNATHO Analyzer III同时记录这些运动，并测量所有咀嚼笔划的舌周运动时间和下颌运动。研究结果如下：与植入ELP前相比，ELP植入后即刻的咀嚼效率显著降低，随着ELP的插入，其咀嚼效率、舌运动周期时间和下颌运动逐渐恢复到ELP植入前的水平，舌的垂直运动与最大的咀嚼效率呈现相同的变化，提示舌和下颌运动的协调对于充分咀嚼是非常重要的。用反映舌体垂直动量随咀嚼过程变化的参数可以有效地评价咀嚼性能。较少

To establish the objective evaluating method for masticatory performance, the skill of mandibular movement was investigated. The subjects were 8 healthy fully dentates and a simulated patient cemented the temporally metal crown with 50mu.m vertical occiusal interference. Tapping movements of mandible were performed along to the sound signal with 2Hz. Traces of mandibular movement using the SIROGNATHO ANALYZER III (Kanops, Co) and EMG of masticatory muscles were recorded simultaneously. The results showed that the deviations of cycle time of mandibular movement and EMG of temporal muscles were striking small in the 8 healthy fully dentates. On the other hand, the deviations of cycle time from the first stroke to the tenth stroke were extremely unstable comparing other ten strokes in the simulated patient. It was suggested that the deviation of the cycle time of mandibular movement would be an effective parameter of evaluation for the control ability of mandibular movement.The relationsh … More ip between tongue and mandibular movements were analyzed with and without an experimental lingual plate (ELP) while chewing 3 grams of peanuts. Moreover, masticatory efficiency was also evaluated by the sievingmethod. These movements were recorded simultaneously by use of ultrasound diagnostic equipment and the SIROGNATHO ANALYZER III immediately after, 1, 3, 6, 12, 24 and 48 hours after insertion of ELP.The cycle time of tongue and mandibular movement in all the chewing strokes were measured. The results were as follows. The masticatory efficiency immediately after ELP insertion decreased significantly compared to that of before the insertion of the ELP.The masticatory efficiency, cycle time of tongue movement and the mandibular movement with the insertion of the ELP gradually recovered to the levels prior to the insertion of the ELP.The vertical momentum of tongue indicated the same change as the mast icatory efficiency.It was suggested that the coordination of tongue and mandibular movement was very important for sufficient mastication. Theuseof theparameter indicating the change with mastication proceeding of vertical momentum of tongue would be effective to evaluate for masticalory performance. Less