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      A influência de sintomas da disfunção temporomandibular na força máxima de mordida em indivíduos com deformidade dentofacial Translated title: The influence of temporomandibular dysfunction symptoms on maximum bite force in individuals with dentofacial deformity

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          Abstract

          RESUMO Introdução Indivíduos com deformidade dentofacial (DDF) apresentam comprometimento na oclusão, que pode alterar o desempenho mastigatório e, consequentemente, a força de mordida, não tendo sido encontrados estudos que considerassem a relação entre disfunção temporomandibular (DTM) e força de mordida, nessa população. Objetivo Verificar se a presença de sintomas de DTM influencia a força máxima de mordida (FMM) em indivíduos com DDF. Métodos Participaram do estudo 60 indivíduos, 30 com DDF (GDDF) e 30 com oclusão normal (GC). Para avaliação da DTM, foi aplicado um questionário anamnésico (QA), contendo 10 questões que permitem a classificação quanto à presença e grau de sintomas da DTM. A FMM foi avaliada utilizando-se um transdutor de força mandibular, integrado ao eletromiógrafo EMG System 810c. Foram realizados três registros da força de mordida, com duração de 10 segundos cada. Foi aplicado o coeficiente de correlação de Spearman, com nível de significância de 5%. Resultados Os resultados do QA demonstraram que, no GDDF, houve maior ocorrência de sintomas de DTM, em relação ao GC. Foi observado menor FMM em indivíduos com DDF, comparativamente ao GC. Além disso, foram constatadas correlações negativas e significantes entre os escores obtidos na aplicação do QA e a FMM, ou seja, quanto maior a gravidade dos sintomas da DTM, menor o valor da força de mordida. Conclusão A presença e gravidade dos sintomas da DTM influenciaram a FFM nos individuos com DDF, demonstrando a necessidade de atuação interdisciplinar durante todas as fases do tratamento ortocirúrgico.

          Translated abstract

          ABSTRACT Introduction Individuals with dentofacial deformity (DFD) show impairment in dental occlusion, which may alter the masticatory performance and, consequently, the bite force. No research was found on the relationship between temporomandibular disorders (TMD) and bite force for this population. Purpose To determine if the presence of TMD symptoms influence the maximum bite force (MBF) in individuals with DFD. Methods Sixty individuals were evaluated, 30 with DFD (GDFD) and 30 with normal occlusion (CG). The TMD was assessed by an anamnesis questionnaire (AQ) containing 10 questions that allow classification of the presence and degree of signs and symptoms of TMD. MBF was assessed using a mandibular force sensor, of the EMG System 810c electromyograph. Three records of bite force were obtained, with 10-second duration each. The Spearman correlation coefficient was used, at a significance level of 5%. Results The results of AQ showed higher prevalence of TMD symptoms in GDFD in relation to CG. Also, lower MBF was observed in subjects with DFD compared to CG. In addition, negative and significant correlations were found between scores obtained in the application of AQ and the MBF; therefore, the higher the severity of TMD symptoms, the lower the bite force. Conclusion The presence and severity of TMD symptoms influenced the MBF in individuals with DFD, demonstrating the importance for interdisciplinary intervention during all stages of surgical-orthodontic treatment.

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          Most cited references26

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          Studies on function and dysfunction of the masticatory system. II. Index for anamnestic and clinical dysfunction and occlusal state.

          M Helkimo (1974)
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            Prevalence of temporomandibular dysfunction and its association with malocclusion in children and adolescents: an epidemiologic study related to specified stages of dental development.

            A sample of 4724 children (2353 girls and 2371 boys) (5-17 years old) were grouped not only by chronological age but also by stage of dental development (deciduous, early mixed, late mixed, and permanent dentition). The registrations included functional occlusion (anterior and lateral sliding, interferences), dental wear, mandibular mobility (maximal opening, deflection), and temporomandibular joint and muscular pain recorded by palpation. Headache was the only symptom of temporomandibular dysfunction (TMD) reported by the children. The results showed that one or more clinical signs were recorded in 25% of the subjects, most of them being mild in character. The prevalences increased during the developmental stages. Girls were in general more affected than boys. Significant associations were found between different signs, and TMD was associated with posterior crossbite, anterior open bite, Angle Class III malocclusion, and extreme maxillary overjet.
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              Bite Force and Occlusion

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                acr
                Audiology - Communication Research
                Audiol., Commun. Res.
                Academia Brasileira de Audiologia (São Paulo, SP, Brazil )
                2317-6431
                March 2017
                : 22
                : 0
                : e1736
                Affiliations
                [1] Rio Branco AC orgnameFonoaudióloga clínica Brasil
                [3] Bauru São Paulo orgnameUniversidade do Sagrado Coração Brazil
                [4] Bauru orgnameUniversidade de São Paulo orgdiv1Faculdade de Odontologia de Bauru Brazil
                [2] Piracicaba SP orgnameFonoaudióloga clínica Brasil
                Article
                S2317-64312017000100303
                10.1590/2317-6431-2016-1736
                a2d17ee9-5e59-4b32-9a29-f596054c379d

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 15 July 2016
                : 19 December 2016
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 0
                Product

                SciELO Brazil

                Categories
                Artigos Originais

                Força de mordida,Malocclusion,Temporomandibular joint disorders,Bite force,Transtornos da Articulação Temporomandibular,Sistema estomatognático,Má oclusão,Dentofacial deformities,Deformidades dentofaciais,Stomatognathic system

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