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首页> 外文期刊>Journal of Biomechanics >Predicting masticatory jaw movements from chin movements using multivariate linear methods
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Predicting masticatory jaw movements from chin movements using multivariate linear methods

机译：使用多元线性方法从下巴运动预测咀嚼颚运动

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摘要

Previously, we have used bivariate correlations of maximum and minimum displacement, velocity and acceleration variables to compare masticatory chin and jaw movements (J. Prosthet. Dent. 81 (1999) 179). This previous study represented a first step in exploring the hypothesis that the chin contained useful information regarding jaw kinematics. The current study extends our understanding of the relationship between masticatory chin and jaw movements by: (1) reconstructing and evaluating a more continuous trajectory of chin and jaw movements, and (2) performing multivariate correlations comparing chin and jaw movements at discrete points along the trajectory in order to gain insight into the coupling of chin and jaw movements during a chewing cycle. Results indicated that chin and jaw movement trajectories were visually similar in the lateral, vertical, and anteroposterior axes. The adjusted R 2 results in the lateral, vertical, and anteroposterior dimensions averaged 0.74, 0.78, and 0.89, respectively. Within chewing cycles, the lowest correlations between chin and jaw movements in the lateral and vertical dimensions occurred when the jaw was relatively closed, whereas the lowest correlations between chin and jaw movements in the anteroposterior dimension occurred while the jaw was opening from a closed position. The results indicated that jaw and chin movements were qualitatively similar and that at least 74% of the variation in jaw movements could be accounted for by multivariate linear models of chin movement. (c) 2004 Elsevier Ltd. All rights reserved.
机译：以前，我们使用最大和最小位移，速度和加速度变量的二元相关性来比较咀嚼下巴和颚的运动（J. Prosthet。Dent。81（1999）179）。这项先前的研究代表了探索下巴包含有关下颌运动学的有用信息的假设的第一步。当前的研究通过以下方式扩展了我们对咀嚼下巴和颌骨运动之间关系的理解：（1）重建和评估下巴和颌骨运动的更连续轨迹，以及（2）执行多元相关性比较沿下颌的离散点的下巴和颌骨运动轨迹，以便深入了解咀嚼周期中下巴和下巴运动的耦合。结果表明下巴和下巴的运动轨迹在横向，垂直和前后轴上在视觉上相似。调整后的R 2导致外侧，垂直和前后尺寸分别平均为0.74、0.78和0.89。在咀嚼周期内，当颌骨相对闭合时，在横向和垂直方向上下巴和颌骨运动之间的相关性最低，而当颌骨从闭合位置打开时，在前后方向上颌骨和颌骨运动之间的相关性最低。结果表明，下巴和下巴运动在质量上相似，并且下巴运动的至少74％的变化可以由下巴运动的多元线性模型解释。 （c）2004 Elsevier Ltd.保留所有权利。

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