Evidence of measures of normalcy for thickness of masseter muscle evaluated with ultrasound: a review study
Evidências de medidas de normalidade para a espessura do músculo masseter avaliadas com ultrassonografia: estudo de revisão
Jabson Herber Profiro de Oliveira; Mário Genuíno Dourado Filho; Thais Myriam Aragão Melo; Niedje Siqueira de Lima; Milton Marcelino Filho; Hilton Justino da Silva
Abstract
The objective was to study measures of normality for the thickness of the masseter muscle, and the methods of measurement of thickness using ultrasound. Was conducted a review from databases MEDLINE, LILACS, JCR and PubMed. Publications were used until June 2013. Works that involved young-adults individuals, healthy as the stomatognathic system – without the presence of signs and symptoms of temporomandibular joint disorders were included. 166 articles has been found. By reading the titles, repeated articles were excluded, remaining 108 studies. After reading the title and the exclusion of articles that were not related to the theme, 54 papers were obtained. Reading the abstracts allowed the acquisition of 22 studies. In the analysis of the measures t tests were used for paired-sample and independent, verified the confidence intervals and prepared forest plot graphics to study the heterogeneity of the studies. It was observed that the masseter muscle in males demonstrates to be thicker when compared to the women's, both at rest and in contraction. A comparison of resting state between the genders revealed no significant difference. The same occurred in the contraction. Also was verified the association of other methods with ultrasonography. The probability sample obtained revealed values for the state of contraction and rest in both sexes. Measurements demonstrated differences between the genders. Significant heterogeneity was found in the study's data. The measurement of the thickness of the masseter muscle with ultrasonography is presented in different studies as an objective method, precise and reproducible.
Keywords
Resumo
O objetivo foi estudar medidas de normalidade para espessura do músculo masseter, bem como os métodos de mensuração da espessura por ultrassonografia. Foi realizada uma revisão a partir das bases de dados MEDLINE, LILACS, JCR e PubMed. Foram utilizadas publicações até junho de 2013. Foram incluídos trabalhos que envolveram indivíduos adultos jovens considerados hígidos quanto ao sistema estomatognático – sem a presença de sinais e sintomas de distúrbios na articulação temporomandibular. Foram encontrados 166 artigos. Pela leitura do titulo foram excluídos os artigos repetidos, restando 108 estudos. Após a leitura do titulo e a exclusão de artigos que não estavam relacionados ao assunto, foram obtidos 54 trabalhos. A leitura dos resumos permitiu a obtenção de 22 estudos. Na análise das medidas foram utilizados os testes t para amostras pareadas e independentes, verificado os intervalos de confiança e confeccionados gráficos forest plot para estudar a heterogeneidade dos trabalhos. Constatou-se que o músculo masseter em homens demonstra ser mais espesso quando comparado ao das mulheres, tanto no repouso quanto em contração. A comparação do estado de repouso entre os gêneros não revelou diferença significante. O mesmo ocorreu em contração. Também verificou-se a associação de outros métodos com a ultrassonografia. A amostra probabilística obtida revelou valores para o estado de contração e repouso. Houve diferença nas medidas entre os gêneros. Foi constatada significante heterogeneidade nos dados dos estudos. A mensuração da espessura do músculo masseter com a ultrassonografia apresenta-se nos diversos estudos como um método objetivo, preciso e com reprodutibilidade.
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References
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Submitted date:
01/15/2014
Accepted date:
03/17/2014
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