Because of the rigid coupling between the upper dentition and the skull, instrumented mouthguards have been shown to be a viable way of measuring head impact kinematics for assisting in understanding the underlying biomechanics of concussions. This has led various companies and institutions to further develop instrumented mouthguards. However, their use as a research tool for understanding concussive impacts makes quantification of their accuracy critical, especially given the conflicting results from various recent studies. Here we present a study that uses a pneumatic impactor to deliver impacts characteristic to football to a Hybrid III headform, in order to validate and compare five of the most commonly used instrumented mouthguards. We found that all tested mouthguards gave accurate measurements for the peak angular acceleration, the peak angular velocity, brain injury criteria values (mean average errors < 13, 8, 13%, respectively), and the mouthguards with long enough sampling time windows are suitable for a convolutional neural network-based brain model to calculate the brain strain (mean average errors < 9%). Finally, we found that the accuracy of the measurement varies with the impact locations yet is not sensitive to the impact velocity for the most part.

由于上牙列和颅骨之间的刚性耦合，仪表护齿已被证明是一种测量头部冲击运动学的可行方法，以帮助了解脑震荡的潜在生物力学。这导致各种公司和机构进一步开发仪表化护齿器。然而，它们用作理解震荡影响的研究工具使得对其准确性的量化至关重要，特别是考虑到最近各种研究的相互矛盾的结果。在这里，我们展示了一项研究，该研究使用气动冲击器将足球的冲击特性传递给 Hybrid III 头型，以验证和比较五种最常用的仪表护齿。我们发现所有经过测试的护齿器都能准确测量峰值角加速度，峰值角速度、脑损伤标准值（平均平均误差分别 < 13、8、13%）和具有足够长采样时间窗口的护齿适用于基于卷积神经网络的脑模型来计算脑应变（平均平均误差 < 9%）。最后，我们发现测量的准确性随撞击位置而变化，但在很大程度上对撞击速度并不敏感。