Study on stress evaluation in temporomandibular disorder with an autonomic nerve function

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Stress is one of the causes of temporomandibular disorder (TMD) that is known as a multifactorial disease; however the objective evaluation of stress in TMD patient has not been established yet. Therefore, we measured the heart rate variability of TMD patients by acceleration plethysmography (APG). There were no significant difference in HF power and the ratio of LF to HF components between TMD group and control group. It is concluded that APG system is not suitable for the objective evaluation of stress in the TMD patient.