TY - JOUR
T1 - Changes in electromyographic activity following superior repositioning of the maxilla
AU - Johnston, Craig P.
AU - Throckmorton, Gaylord S.
AU - Bell, William H.
PY - 1984/10
Y1 - 1984/10
N2 - Surgical reduction of lower anterior facial height may alter several aspects of jaw muscle function. This study examined the biomechanics, electromyographic activity, and maximal bite forces in three patients manifesting vertical maxillary excess prior to and six months following superior repositioning of the maxilla. Reduction of lower anterior facial height by Le Fort I osteotomy tends to increase mechanical advantage of the jaw adductor muscles. It may also decrease muscle activity during isometric biting. It does not appear to alter the maximal isometric bite force.
AB - Surgical reduction of lower anterior facial height may alter several aspects of jaw muscle function. This study examined the biomechanics, electromyographic activity, and maximal bite forces in three patients manifesting vertical maxillary excess prior to and six months following superior repositioning of the maxilla. Reduction of lower anterior facial height by Le Fort I osteotomy tends to increase mechanical advantage of the jaw adductor muscles. It may also decrease muscle activity during isometric biting. It does not appear to alter the maximal isometric bite force.
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U2 - 10.1016/0278-2391(84)90208-8
DO - 10.1016/0278-2391(84)90208-8
M3 - Article
C2 - 6592307
AN - SCOPUS:0021192725
VL - 42
SP - 656
EP - 664
JO - Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons
JF - Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons
SN - 0278-2391
IS - 10
ER -