Jaw-motor effects of experimental jaw-muscle pain and stress in patients with deep bite and matched control subjects

TY - JOUR

T1 - Jaw-motor effects of experimental jaw-muscle pain and stress in patients with deep bite and matched control subjects

AU - Sonnesen, Liselotte

AU - Svensson, Peter

N1 - Copyright © 2013 Elsevier Ltd. All rights reserved.

PY - 2013/10

Y1 - 2013/10

N2 - OBJECTIVE: The effect of experimental jaw-muscle pain and stress on masticatory muscle activity in TMD-patients has been discussed. Furthermore, associations between TMD and deep bite patients have been studied. Accordingly in the present study, comparison of EMG responses at rest, maximal clenching, during evoked pain and stress between deep bite patients and controls was investigated.DESIGN: In 30 deep bite patients and in 30 sex-/age-matched controls with neutral occlusion EMG activity was recorded bilaterally from masseter and anterior temporalis muscles before and during evoked pain and before and during a stress task. Evoked pain was induced by injections of glutamate into the masseter (local pain) and brachioradialis (remote pain) muscles and resting EMG activity was recorded before and after 1, 2, 3, 4, 5 and 10min. A precision task was used to simulate a stressful condition and EMG activity was recorded twice during the task. Maximal EMG activity was recorded during maximal clenching.RESULTS: Resting and maximal EMG activity were significantly different between groups and age with no gender differences. EMG activity during local pain and during the precision task were significantly different between groups, gender, age and time, whereas no time effect was found for the EMG activity during remote pain.CONCLUSIONS: Patients with deep bite have significantly different jaw motor responses to painful stimulation of the trigeminal region and manual precision tasks suggesting a differential integration of both somatosensory and behavioural stimuli.

AB - OBJECTIVE: The effect of experimental jaw-muscle pain and stress on masticatory muscle activity in TMD-patients has been discussed. Furthermore, associations between TMD and deep bite patients have been studied. Accordingly in the present study, comparison of EMG responses at rest, maximal clenching, during evoked pain and stress between deep bite patients and controls was investigated.DESIGN: In 30 deep bite patients and in 30 sex-/age-matched controls with neutral occlusion EMG activity was recorded bilaterally from masseter and anterior temporalis muscles before and during evoked pain and before and during a stress task. Evoked pain was induced by injections of glutamate into the masseter (local pain) and brachioradialis (remote pain) muscles and resting EMG activity was recorded before and after 1, 2, 3, 4, 5 and 10min. A precision task was used to simulate a stressful condition and EMG activity was recorded twice during the task. Maximal EMG activity was recorded during maximal clenching.RESULTS: Resting and maximal EMG activity were significantly different between groups and age with no gender differences. EMG activity during local pain and during the precision task were significantly different between groups, gender, age and time, whereas no time effect was found for the EMG activity during remote pain.CONCLUSIONS: Patients with deep bite have significantly different jaw motor responses to painful stimulation of the trigeminal region and manual precision tasks suggesting a differential integration of both somatosensory and behavioural stimuli.

KW - Adult

KW - Case-Control Studies

KW - Electromyography

KW - Female

KW - Humans

KW - Male

KW - Masticatory Muscles

KW - Middle Aged

KW - Myalgia

KW - Stress, Mechanical

KW - Task Performance and Analysis

KW - Temporomandibular Joint Disorders

U2 - 10.1016/j.archoralbio.2013.07.003

DO - 10.1016/j.archoralbio.2013.07.003

M3 - Journal article

C2 - 23890660

SN - 0003-9969

VL - 58

SP - 1491

EP - 1497

JO - Archives of Oral Biology

JF - Archives of Oral Biology

IS - 10

ER -