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Revista Odonto Ciência

On-line version ISSN 1980-6523

Rev. odonto ciênc. (Online) vol.25 no.1 Porto Alegre  2010 



Reliability of EMG activity in complete denture users during simulation of activities of daily living


Reprodutibilidade da atividade eletromiográfica em usuários de próteses totais durante simulação de atividades de vida diária



Simone Michielon BaldisserottoI; Dúcia Caldas Cosme da TrindadeII; Jefferson Fagundes LossIII; Rosemary Sadami Arai ShinkaiIV

IPrivate Practice, Caxias do Sul, RS, Brazil
IIDepartment of Restorative Dentistry, Federal University of Paraíba (UFPB), João Pessoa, PB, Brazil
IIIDepartment of Physical Education, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
IVDepartment of Prosthodontics, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil





PURPOSE: To describe a kinesiologic EMG method and determine the reliability of EMG activity of representative muscles of mastication (temporal, masseter), posture of neck (sternocleidomastoid, trapezius) and trunk (rectus abdominis, paravertebral), and lower extremity strength (rectus femoris, medial gastrocnemius) during simulation of activities of daily living.
METHODS: Ten edentulous healthy women (age: 58.2±5.6 yr old) were tested with and without their dentures. EMG signals were recorded for each subject during three trials of each kinesiologic test: to stand up/sit down on a chair (TC), to rise/lie down in the bed (TB), and to lift/lower bags (TW). The same-day reprodutibility of the EMG values was estimated by test-retest reliability analyses. For each test (TC, TB, and TW) the intraclass correlation coefficient (ICC) and 95% confidence interval were estimated stratified by muscle, presence or not of complete dentures, and movement during the test (up and down) considering the three repetitions per subject to assess consistency.
RESULTS: All muscles showed activation during the tests. The method yielded moderate to high ICCs; the highest test-retest reliability levels were estimated for the sternocleidomastoid (0.82-0.97) and paravertebral (0.86-0.99) muscles.
CONCLUSION: These findings suggest that the described kinesiologic EMG method showed satisfactory reliability in this sample.

Key words: Electromyography; complete dentures; activities of daily living


OBJETIVO: Descrever uma metodologia de EMG cinesiológica e determinar a reprodutibilidade da atividade eletromiográfica dos músculos mastigatórios (m. temporal e m. masseter), posturais do pescoço (mm. esternocleidomastoideo e trapézio), posturais do tronco (mm. reto abdominal e paravertebrais) e de força das extremidades inferiores (mm. reto femoral e gastrocnemius medial) durante simulação de atividades de vida diária (AVDs).
METODOLOGIA: A amostra foi constituída por dez mulheres saudáveis, usuárias de prótese total bimaxilar, com idade média de 58,2 anos. Foram realizados três testes AVDs: levantar/sentar da cadeira (TCAD), levantar/deitar na cama (TCAM) e pegar/largar sacolas (TSAC). A reprodutibilidade dos valores EMG foi analisada por teste-reteste. Para cada teste AVD foram estimados coeficiente de correlação intraclasse (CCIC) e intervalo de confiança de 95% com estratificação por músculo, condição com e sem prótese (suporte oclusal) e movimento durante o teste, considerando três repetições por sujeito para avaliar consistência.
RESULTADOS: Todos os grupos musculares apresentaram ativação durante os testes simulando AVDs. O método utilizado mostrou reprodutibilidade satisfatória com CCICs considerados moderados a altos. Os maiores valores de CCIC foram estimados para os m. esternocleidomastoideo (0,82 a 0,97) e m. paravertebrais (0,86 a 0,99).
CONCLUSÃO: Os resultados sugerem que o método de EMG cinesiológico descrito apresentou reprodutibilidade satisfatória nesta amostra.

Palavras-chave: Eletromiografia; cinesiologia aplicada; prótese total; atividades coditianas



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This study was partially supported by the Brazilian Ministry of Education and Culture (CAPES graduate scholarship) and the National Council for Scientific and Technological Development (CNPq/ Ministry of Science and Technology - PQ-304394/2006-8). We would like to thank Fabricio Macagnan, Marcelo Rohde, Michele Fonseca and William Osterkamp, from the Physical Therapy School, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil, for their technical assistance.



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Simone Michielon Baldisserotto

Rua Bento Gonçalves, 1282 sala 13
Caxias do Sul, RS - Brazil 95020-412

Received: December 30, 2008
Accepted: June 15, 2009

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