TY - JOUR

T1 - Clinical significance of isometric bite force versus electrical activity in temporal and masseter muscles

AU - Bakke, Merete

AU - Michler, L

AU - Han, K

AU - Möller, Eigild

PY - 1989

Y1 - 1989

N2 - Bite force and activity in temporal and masseter muscles during biting and chewing were recorded in 19 control subjects and 23 subjects with symptoms and signs of functional disorders of the craniomandibular system. The entire group comprised 13 men and 29 women, 14-63 yr of age. Maximal unilateral bite force was 480 Newton (N) in control subjects and 387 N in patients, with corresponding bilateral values of 347 N and 230 N. At predetermined levels of contraction, temporalis and masseter activity were linearly related. Correlations of bite force and activity in short static contractions were significant with respect to unilateral, but not to bilateral force measurements. Only in the masseter muscle was strength of dynamic contractions during chewing significantly correlated to bite force. With the present method it was demonstrated that unilateral bite force is a simple clinical indicator of mandibular elevator strength as a whole, but inadequate to disclose asymmetric conditions. During isometric contraction, relative strength of electromyographic activity fairly accurately imaged the output of mechanical activity.

AB - Bite force and activity in temporal and masseter muscles during biting and chewing were recorded in 19 control subjects and 23 subjects with symptoms and signs of functional disorders of the craniomandibular system. The entire group comprised 13 men and 29 women, 14-63 yr of age. Maximal unilateral bite force was 480 Newton (N) in control subjects and 387 N in patients, with corresponding bilateral values of 347 N and 230 N. At predetermined levels of contraction, temporalis and masseter activity were linearly related. Correlations of bite force and activity in short static contractions were significant with respect to unilateral, but not to bilateral force measurements. Only in the masseter muscle was strength of dynamic contractions during chewing significantly correlated to bite force. With the present method it was demonstrated that unilateral bite force is a simple clinical indicator of mandibular elevator strength as a whole, but inadequate to disclose asymmetric conditions. During isometric contraction, relative strength of electromyographic activity fairly accurately imaged the output of mechanical activity.

KW - Adolescent

KW - Adult

KW - Bite Force

KW - Dental Occlusion

KW - Electromyography

KW - Female

KW - Humans

KW - Isometric Contraction

KW - Male

KW - Masseter Muscle

KW - Masticatory Muscles

KW - Middle Aged

KW - Muscle Contraction

KW - Reproducibility of Results

KW - Temporal Muscle

KW - Temporomandibular Joint Disorders

M3 - Journal article

C2 - 2617156

VL - 97

SP - 539

EP - 551

JO - Scandinavian Journal of Dental Research

JF - Scandinavian Journal of Dental Research

SN - 0029-845X

IS - 6

ER -