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Surface electromyographic evaluation of jaw muscles in children with unilateral crossbite and lateral shift in the early mixed dentition: sexual dimorphism

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Surface electromyographic evaluation of jaw muscles in children with unilateral crossbite and lateral shift in the early mixed dentition: sexual dimorphism

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dc.contributor.author Lenguas, Leticia es
dc.contributor.author Alarcón, Jose Antonio es
dc.contributor.author Venancio, Filipa es
dc.contributor.author Kassem, Marta es
dc.contributor.author Martín, Conchita es
dc.date.accessioned 2014-05-28T12:42:52Z
dc.date.available 2014-05-28T12:42:52Z
dc.date.issued 2012 es
dc.identifier.citation Lenguas, Leticia ; Alarcón, Jose Antonio ; Venancio, Filipa ; Kassem, Marta ; Martín, Conchita. Surface electromyographic evaluation of jaw muscles in children with unilateral crossbite and lateral shift in the early mixed dentition: sexual dimorphism. En: Medicina oral, patología oral y cirugía bucal. Ed inglesa, 2012, Vol. 17, No. 6: 1096-1102 es
dc.identifier.uri http://hdl.handle.net/10550/35528
dc.description.abstract Objectives: To examine the activity of jaw muscles at rest and during maximal voluntary clenching (MVC) in children with unilateral posterior crossbite (UPXB) and functional lateral shift in the early mixed dentition and to evaluate sex differences. Material and Methods: The sample included 30 children (15 males, 15 females) aged 6 to 10 years old, with UPXB and functional mandibular lateral shift (>=1.5 mm) in the early mixed dentition. sEMG activity coming from the muscle areas (anterior temporalis [AT], posterior temporalis [PT], masseter [MA] and suprahyoid [SH]) were obtained from both the crossbite (XB) and noncrossbite (NONXB) sides at mandibular rest position. sEMG acti- vity of the bilateral AT and MA muscles sides was obtained during MVC. Asymmetry and activity indexes were calculated for each muscle area at rest and during MVC; the MA/TA ratio during MVC was also determined. Results: At rest, no differences were found between sexes for any muscle areas or asymmetry and activity indexes. No differences were found between XB and NONXB sides. During MVC, however, significant sex differences were found in AT and MA activity, with higher sEMG values in males than in females, on both XB and NONXB sides. Asymmetry indexes, activity indexes and MA/AT ratios did not show significant differences between the sexes. Activity was symmetric both in males and in females. Conclusions: At rest, no sex differences were found, but during MVC males showed higher activity than did females in both XB and NONXB AT and MA muscle areas. Muscular activity was symmetrical at rest and during MVC in both sexes. Sexual dimorphism should be considered in the diagnosis and treatment of UPXB and lateral shift in the early mixed dentition. en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title Surface electromyographic evaluation of jaw muscles in children with unilateral crossbite and lateral shift in the early mixed dentition: sexual dimorphism es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.type.hasVersion VoR es_ES

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