Effect of the Mandibular Orthopedic Repositioning Appliance on Trunk and
Upper Limb Muscle Activation during Maximum Isometric Contraction |
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| Authors: | Sang-Yeol Lee Min-Ho Hong Min-Chull Park Sung-Min Choi |
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| Affiliation: | 1) Department of Physical Therapy, Kyungsung University, Republic of Korea;2) Major of Dental Laboratory Science Graduate School, Department of Dental Technology, Catholic University of Pusan, Republic of Korea;3) Department of Physical Therapy, Catholic University of Pusan, Republic of Korea;4) Department of Dental Laboratory Science, Catholic University of Pusan, Republic of Korea |
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| Abstract: | [Purpose] The purpose of this study was to measure the muscle activities of the trunkmuscles and upper limb muscles during maximum isometric contraction when temporomandibularjoint alignment was achieved with a mandibular orthopedic repositioning appliance in orderprovide basic data on the effects of mandibular orthopedic repositioning appliance on theentire body. [Subjects] The present study was conducted with healthy Korean adults intheir 20s (males=10, females=10). [Methods] An 8 channel surface electromyography systemwas used to measure the muscle activities of the upper limb muscles and neck muscles ofthe subjects during maximum isometric contraction with and without use of a mandibularorthopedic repositioning appliance. [Results] The maximum isometric contractions of thetrunk and upper limb muscles when mandibular orthopedic repositioning appliance were usedwere compared with those when no mandibular orthopedic repositioning appliance was used.The results showed that the sternocleidomastoid muscle, cervical and lumbar erectorspinae, upper trapezius, biceps, triceps, rectus abdominis and internal oblique andexternal oblique muscles all showed significant increases in maximum isometriccontractions with a mandibular orthopedic repositioning appliance. [Conclusion] The use ofa mandibular orthopedic repositioning appliance is considered to be a method for normaladults to improve the stability of the entire body with the improvement of the stabilityof the TMJ. The proximal improvement in stability improves of the proximal therebyimproving not only muscle strength with increased muscle activation but also stabilityduring exercises.Key words: Electromyography, Maximum isometric contraction, MORA |
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