Validation of the linear acceleration measured by instrumented mouthguards for in-vivo head impact monitoring

Instrumented mouthguards are used to record in-vivo head kinematics in sport. The validation of the CSx mouthguard’s capacity to measure linear acceleration was assessed using impact testing versus a reference single-axis accelerometer. The CSx mouthguard’s linear acceleration demonstrated favourable validity; however, impact direction and impact magnitude resulted in differences between the mouthguard and the reference sensor.