Yamaguchi K, Nanda R S
College of Dentistry, Department of Orthodontics, University of Oklahoma, Oklahoma City 73190.
Angle Orthod. 1992 Winter;62(4):257-64. doi: 10.1043/0003-3219(1992)062<0257:BFCIGT>2.0.CO;2.
Changes in human gingival blood flow were measured using a Laser doppler flowmeter. The change of blood flow was correlated to the degree of force applied and there were variations in measurement of decreased blood flow among the subjects. The variation was attributed to the degree of tooth displacement and the size of the interdental space. This study examined the effect of tooth displacement on the gingival blood flow, as well as age and sex differences. Blood flow in gingival tissue was measured using a laser doppler flowmeter, and displacement of the maxillary incisors was measured using an eddy current sensor. The correlation coefficient of the decreased blood flow to the tooth displacement was 0.809, and it was higher than that to the degree of applied force (r = -0.625). The regression coefficient of decreased blood flow to the displacement of teeth was significantly correlated to the interdental space. The regression coefficient of decreased blood flow to the percentage of tooth displacement was independent of the interdental space. However, the regression coefficient of decreased blood flow to the percentage of tooth displacement was significantly higher in young subjects than in adults.
使用激光多普勒血流仪测量人类牙龈血流量的变化。血流量的变化与施加的力的程度相关，并且受试者之间血流量减少的测量存在差异。这种差异归因于牙齿移位的程度和牙间隙的大小。本研究考察了牙齿移位对牙龈血流量的影响以及年龄和性别差异。使用激光多普勒血流仪测量牙龈组织中的血流量，并使用涡流传感器测量上颌切牙的移位。血流量减少与牙齿移位的相关系数为0.809，高于与施加力的程度的相关系数（r = -0.625）。血流量减少与牙齿移位的回归系数与牙间隙显著相关。血流量减少与牙齿移位百分比的回归系数与牙间隙无关。然而，血流量减少与牙齿移位百分比的回归系数在年轻受试者中显著高于成年人。
