Kogawa E M, Calderon P S, Lauris J R P, Araujo C R P, Conti P C R
Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
J Oral Rehabil. 2006 Aug;33(8):559-65. doi: 10.1111/j.1365-2842.2006.01619.x.
The aim of this study was to evaluate the maximum bite force in temporomandibular disorders (TMD) patients. Two hundred women were equally divided into four groups: myogenic TMD, articular TMD, mixed TMD and control. The maximum bite force was measured in the first molar area, on both sides, in two sessions, using an IDDK (Kratos) Model digital dynamometer, adapted to oral conditions. Three-way anova, Tukey and Pearson correlation tests were used for the statistical analysis. The level of statistical significance was given when P < or = 0.05. The maximal bite force values were significantly higher in the control group than in the experimental ones (P = 0.00), with no significant differences between sides. Higher values were obtained in the second session (P = 0.001). Indeed, moderate negative correlation was found between age and bite force, when articular, mixed groups and all groups together were evaluated. A moderate negative correlation was also detected between TMD severity and the maximal bite force values for myogenic, mixed and all groups together. Authors concluded that the presence of masticatory muscle pain and/or TMJ inflammation can play a role in maximum bite force. The mechanisms involved in this process, however, are not well understood and deserve further investigation.
本研究的目的是评估颞下颌关节紊乱病（TMD）患者的最大咬合力。200名女性被平均分为四组：肌源性TMD组、关节性TMD组、混合性TMD组和对照组。使用适合口腔条件的IDDK（Kratos）型号数字测力计，在两个阶段对两侧第一磨牙区域的最大咬合力进行测量。采用三因素方差分析、Tukey检验和Pearson相关性检验进行统计分析。当P≤0.05时给出统计学显著性水平。对照组的最大咬合力值显著高于实验组（P = 0.00），两侧之间无显著差异。在第二阶段获得了更高的值（P = 0.001）。事实上，在评估关节性、混合性组以及所有组时，发现年龄与咬合力之间存在中度负相关。在肌源性、混合性组以及所有组中，还检测到TMD严重程度与最大咬合力值之间存在中度负相关。作者得出结论，咀嚼肌疼痛和/或颞下颌关节炎症的存在可能在最大咬合力中起作用。然而，这一过程中涉及的机制尚不清楚，值得进一步研究。
