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Critical Reviews™ in Biomedical Engineering
SJR: 0.26 SNIP: 0.375 CiteScore™: 1.4

ISSN Imprimir: 0278-940X
ISSN En Línea: 1943-619X

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Critical Reviews™ in Biomedical Engineering

DOI: 10.1615/CritRevBiomedEng.v28.i34.70
pages 389-394

Reducing Condylar Compression in Clenching Patients

Brian M. May
Department of Bioengineering, Clemson University, 501 Rhodes Research Center, Clemson, SC 29634
Charles Garabadian
Carolina Craniofacia! Center, 119-A Professional Park Drive, Seneca, SC 29678


The two major muscle groups used during clenching activity are the masseter and temporalis muscles. EMG readings of the masseter and temporalis muscles rise significantly during times of macro-clenching. Clenching occurs when the masseter and temporalis muscles contract, pulling the mandible superiorly. The continued contraction of the masseter and temporalis muscles results in compression forces on the teeth and temporomandibular joints. Theoretical joint loading models are utilized to demonstrate the load on the TMJ due to forces generated by the masseter and temporalis muscles.
This study measures the EMG readings during bilateral macro-contraction of the masseter and anterior temporalis muscles. An appliance is fabricated to disengage the posterior teeth and a second series of EMG readings are taken to record lowered EMG readings. The vector forces of the reduced EMG's recordings demonstrate reduced condylar compression during macro-clenching.

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