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A Study on Fatigue and Recovery of Masticatory Muscles during Controlled Biting by Tissue Blood Flow Measurement

组织血流测量控制咬合过程中咀嚼肌疲劳与恢复的研究

基本信息

批准号：
01480446
负责人：
NOMURA Shuichi
金额：
$ 3.33万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

In the clearance method using electrolytically generated hydrogen gas (electrolytic method), hydrogen gas is generated by applying current to the inserted electrode in the tissue. We estimate the amount of local blood flow by its clearance curve. However, there is an inherence in this method because measurement values vary according to the conditions under which in the measurements themselves were taken. For example, the electrolytic current intensity (Id) and electrolytic current duration (Td) which we call the electrolytic parameters. We determine four electrolytic parameters : 1) Id=3 _<mu>A, Td=30 _<sX> 2) Id=5 _<mu>A, Td=30_s 3) Id=7 _<mu>A, Td=30_s 4) Id=10 _<mu>A, Td=50_s. We investigated the reproducibility of measured values of local blood flow in masseter muscle tissue both at rest and in a rest-clench-rest sequence. The tests were conducted on two days, more than thirty days apart, with the following results :At rest position, the variation in measured blood flow in the course of one day is minimal, and the variation between the first and second days is large, except parameter4. During rest-clench-rest sequence, the variation in the measured values observed in one day and that between the first and second days is larger than the results measured only in the rest position, with the exception of parameter4.Based on these data, we concluded that when applying this electrolytic method, we must maintain the positional relationship between the inserted electrode and surrounding tissue. We also surmised that clenching caused changes to occur between them, and the degree of disparity became greater. In parameter4, more hydrogen gas was generated than parameters1, 2or3, and changes in the position of electrode in the tissue had no effect on measurement values. In parameter4, measurement blood flow after clench was larger than that measured in the rest before clench. However, the amount of increase was little.

在使用电解产生的氢气的清除方法（电解法）中，通过向组织中插入的电极施加电流来产生氢气。我们通过清除率曲线估计局部血流量。然而，这种方法有一个固有的特点，因为测量值根据测量本身所处的条件而变化。例如，我们称之为电解参数的电解电流强度（Id）和电解电流持续时间（Td）。我们确定了四个电解参数：1）Id=3 _<mu>A，Td=30 _s; <sX>2）Id=5 _<mu>A，Td= 30_s; 3）Id=7 _<mu>A，Td= 30_s; 4）Id=10 _<mu>A，Td= 50_s。我们调查了咬肌组织局部血流测量值的再现性，在休息和休息-紧握-休息序列。测试在两天内进行，间隔超过30天，结果如下：在休息位置，在一天内测量的血流量的变化是最小的，第一天和第二天之间的变化是很大的，除了参数4。在静息-紧握-静息过程中，除参数4外，其余各测量值在一天内以及第一天与第二天之间的变化均大于静息状态下的测量值。根据这些数据，我们得出结论：在应用这种电解方法时，必须保持插入电极与周围组织的位置关系。我们还推测，紧握导致它们之间发生变化，差距的程度变得更大。在参数4中，比参数1、2或3产生更多的氢气，并且电极在组织中的位置的变化对测量值没有影响。在参数4中，握拳后测得的血流量大于握拳前测得的血流量。不过，增幅不大。