Influencia del pie como receptor en la postura corporal, la simetría facial y cráneo-mandibular / The influence of foot as a receptor on body posture and on facial, mandibular and cranial symmetries

Introducción: Un apoyo plantar incorrecto puede considerarse un factor etiológico de asimetrías faciales y cráneo-mandibulares pues modifica, de forma instantánea, la relación entre el maxilar y la mandíbula. Por tanto, resulta vital identificar la etiología de estas asimetrías para establecer diagnósticos y tratamientos certeros. Objetivo: Determinar la influencia del apoyo plantar en la postura corporal, la simetría facial y cráneo-mandibular en adolescentes. Métodos: Se realizó un estudio descriptivo y transversal de enero a septiembre de 2019 con 180 adolescentes que asistieron al servicio de Ortodoncia de la Clínica Docente de Especialidades «Victoria de Santa Clara», los cuales cumplían con criterios de selección de la investigación. Se analizaron variables faciales, posturales y cefalométricas. Se determinó: la simetría facial mediante el análisis de líneas faciales, el apoyo plantar al calcular el índice cavitario, la postura corporal, según la prueba de Di Rocca, y la simetría mandibular con el método modificado de Kurt y Uysal. Se siguieron las normas éticas y fueron aplicadas la prueba de Fisher, la de McNemar, y la técnica de conglomerado. Resultados: Predominaron los adolescentes con apoyo plantar asimétrico y los pies varo. Del total de casos con asimetría facial, 72,53 % presentó apoyo plantar asimétrico, y 39,44 % planos biilíaco y biclavicular desequilibrados y divergentes. La asimetría mandibular se observó en el 56,11%, la mayoría con apoyo plantar asimétrico. Conclusiones: Se pudo constatar la influencia del apoyo plantar en la postura corporal, la simetría facial y cráneo-mandibular, pues se observó un alto grado de relación entre las variables estudiadas.

Introduction: an incorrect plantar support can be considered an etiological factor of facial, mandibular and cranial asymmetries since it instantly modifies the relationship between the maxilla and mandible. Therefore, it is vital to identify the etiology of these asymmetries to establish accurate diagnoses and treatments. Objective: to determine the influence of plantar support on body posture and on facial, mandibular and cranial symmetries in adolescents. Methods: a descriptive and cross-sectional study was carried out from January to September 2019 with 180 adolescents who were seen in the Orthodontics service at "Victoria de Santa Clara" Specialty Teaching Dental Clinic, who met the research selection criteria. Facial, postural and cephalometric variables were analyzed. Facial symmetry was determined through the analysis of facial lines, plantar support by means of cavity index, body posture according to the Di Rocca test, and mandibular symmetry with the modified method of Kurt and Uysal. Ethical standards were followed and Fisher's and McNemar's tests as well as clustering technique were applied. Results: adolescents with asymmetric plantar support and varus feet predominated. The 72.53% had asymmetric plantar support from the total cases with facial asymmetry, and 39.44% had unbalanced and divergent biiliac and biclavicular planes. Mandibular asymmetry was observed in 56.11%, mostly with asymmetric plantar support. Conclusions: the influence of plantar support on body posture and on facial, mandibular and cranial symmetries was posible to verify since a high degree of relationship was observed among the variables studied.

Correlation between cyphose and lordose with the foot support of adolescents with idiopathic scoliosis / Correlação entre cifose e lordose com o apoio dos pés de adolescentes com escoliose idiopática / Correlación entre cifosis y lordosis con el soporte de los pies de adolescentes con escoliosis idiopática

ABSTRACT: Objective: To verify the correlation between the thoracic and lumbar Cobb angle and the type of foot, and the parameters of plantar support during gait in adolescents with idiopathic scoliosis. Material and Methods: Sixty adolescents with idiopathic scoliosis (AIS) were divided into three groups: normal foot (n=20), cavus foot (n=20), and flat foot (n=20). The Cobb angles of thoracic kyphosis and lumbar lordosis were evaluated by radiographic examination. The plantar arch was recorded the podoscope and calculated by the ratio between the midfoot and the total foot area. The adolescents performed the march on a 20-meter track, with their feet resting on the pressure platform, totaling an average of 12 steps of the foot (right and left). The variables evaluated were: contact area, peak pressure, and maximum force on the four regions of the feet: hindfoot (medial and lateral), midfoot, and forefoot. Results: There was a positive correlation between the Cobb angle of lumbar lordosis and the arch plantar cavus (r=0.40; p=0.048) and flat (0.25; p=0.004), with no significant correlations for the Cobb angle thoracic (p>0.005). The pressure peak strongly correlated with the cavus plantar arch (r=0.92, p=0.001) in the lateral hindfoot and forefoot region, while the flat foot with the midfoot region. Conclusion: The Cobb lumbar lordosis angle positively correlates with the plantar arch height and the plantar support pattern during gait in adolescents with idiopathic scoliosis. Level of Evidence II; Observational and Cross-Sectional Study.

RESUMO: Objetivos: Verificar a correlação entre o ângulo de Cobb torácico e lombar e o tipo de pé e os parâmetros do apoio plantar durante a marcha de adolescentes com escoliose idiopática. Material e Métodos: Foram avaliados 60 adolescentes com escoliose idiopática (EIA), divididos em três grupos: pé normal (n= 20), pé cavo (n=20) e pé plano (n=20). Os ângulos de Cobb da cifose torácica e da lordose lombar foram avaliadas pelo exame radiográfico. O arco plantar foi registrado pelo podoscópio e calculado pela razão entre a área do mediopé e a área total do pé. Os adolescentes realizavam a marcha sobre uma pista de 20 metros, com o registo do apoio dos pés sobre a plataforma de pressão, totalizando em média 12 passos (direito e esquerdo). Foram avaliados: área de contato, pico de pressão e força máxima sobre 4 regiões dos pés: retropé (medial e lateral), mediopé e antepé. Resultados: Houve uma correlação positiva entre o ângulo de Cobb da lordose lombar e o arco plantar cavo (r=0,40; p=0,048) e plano (0,25; p=0,004), sem correlações significantes para o ângulo de Cobb torácico (p>0,005). O pico de pressão obteve uma correlação forte com o arco plantar cavo (r=0,92, p=0,001) em região de retropé lateral e antepé, enquanto que o pé plano com a região do mediopé. Conclusão: O ângulo de Cobb da lordose lombar tem correlação positiva com a altura do arco plantar e o padrão de apoio plantar durante a marcha de adolescentes com escoliose idiopática. Nível de Evidência II; Estudo Observacional e Transversal.

RESUMEN: Objetivos: Verificar la correlación entre el ángulo de Cobb torácico y lumbar y el tipo de pie y los parámetros de soporte plantar durante la marcha en adolescentes con escoliosis idiopática. Material y Métodos: Sesenta adolescentes con escoliosis idiopática (EIA) fueron divididos en tres grupos: pie normal (n=20), pie cavo (n=20) y pie plano (n=20). Los ángulos de Cobb de la cifosis torácica y la lordosis lumbar se evaluaron mediante examen radiográfico. El arco plantar fue registrado por el podoscopio y calculado por la relación entre el área del mediopié y el área total del pie. Los adolescentes realizaron la marcha sobre una pista de 20 metros, con los pies apoyados en la plataforma, totalizando un promedio de 12 pasos (derecho e izquierdo). Fueron evaluados área de contacto, pico de presión y fuerza máxima en las 4 regiones de los pies: retropié (medial y lateral), mediopié y antepié. Resultados: Hubo correlación positiva entre el ángulo de Cobb de la lordosis lumbar y el arco cavo plantar (r=0,40; p=0,048) y plano (0,25; p=0,004), no existiendo correlaciones significativas para el ángulo de Cobb torácico (p> 0,005). El pico de presión obtuvo una fuerte correlación con el arco plantar cavo (r=0,92, p=0,001) en la región lateral del retropié y antepié, mientras que el pie plano con la región del mediopié. Conclusión: El ángulo de Cobb de la lordosis lumbar tiene una correlación positiva con la altura del arco plantar y el patrón de apoyo plantar durante la marcha en adolescentes con escoliosis idiopática. Nivel de Evidencia II; Estudio Observacional y Transversal.

Exercises and neuromuscular electric stimulation for medial longitudinal arch: clinical trial / Exercícios e estimulação elétrica neuromuscular para arco longitudinal medial: ensaio clínico

ABSTRACT Objective The extrinsic muscles, such as the posterior tibialis and long flexor of the hallux and the intrinsic of the foot, are part of the active subsystem of the central system of the foot and play an essential role in the control of the medial longitudinal arch resulting from difficulty in contracting the muscle, neuromuscular electrostimulation (NMES) becomes a resource combined with strengthening and recommended for rehabilitation. T this work aims to evaluate the effectiveness of NMES associated with exercise in deforming the medial longitudinal arch. Methods This is a randomized blind clinical trial. 60 asymptomatic participants were divided into three groups: NMES, exercise and control. The NMES and exercise group performed seven exercises for the intrinsic and extrinsic muscles twice a week for 6 weeks, and the NMES group used an NMES associated with five exercises. Navicular height and medial longitudinal arch angle were taken before and after the intervention period. Results No statistically significant differences existed between groups for navicular height and medial longitudinal arch angle. Conclusion NMES associated with exercise does not change the characteristics of the medial longitudinal arch in association with asymptomatic. Level of Evidence I; Randomized clinical trial.

RESUMO Objetivo Os músculos extrínsecos, como o tibial posterior e flexor longo do hálux e os intrínsecos do pé fazem parte do subsistema ativo do foot core system e exercem papel essencial no controle do arco longitudinal medial. Devido à dificuldade na contração desses músculos, a eletroestimulação neuromuscular (EENM) torna-se um recurso aliado ao fortalecimento e é recomendada para reabilitação. O objetivo desse trabalho é avaliar a eficácia da EENM associada ao exercício na deformação do arco longitudinal medial. Métodos Este é um ensaio clínico randomizado cego. 60 participantes assintomáticos foram divididos em três grupos: EENM, exercício e controle. O grupo EENM e exercício realizaram sete exercícios para os músculos intrínsecos e extrínsecos duas vezes por semana por seis semanas, sendo o grupo EENM utilizou a EENM associada a cinco exercícios. A altura do navicular e o ângulo do arco longitudinal medial foram medidos antes e após o período de intervenção. Resultados Não houve diferenças estatisticamente significativas entre os grupos para a altura do navicular e ângulo do arco longitudinal medial. Conclusão A EENM associada ao exercício não altera as características do arco longitudinal medial em indivíduos assintomáticos. Nível de Evidência I; Estudo Clínico Randomizado.

Subtalar joint in neutral and relaxed positions for evaluation of medial longitudinal arch / Articulação subtalar em posições neutra e relaxada para avaliação do arco longitudinal medial

ABSTRACT Objective: The medial longitudinal arch is the main structure of load bearing and shock absorption of the foot. The evaluation of medial longitudinal arch, such as the navicular height, the medial longitudinal arch angle and the Feiss line should be performed with the subtalar joint in the neutral and relaxed position. Our study analyzed the correlation between the measurements of the subtalar joint in neutral and relaxed positions during the evaluation tests of the medial longitudinal arch. Methods: This is a cross-sectional study, in which 51 healthy volunteers (102 feet; 36 women; 28 ± 5 years, 1.66 ± 0.10 m; 24.5 ± 4.5 kg/m2) had their navicular height, medial longitudinal arch angle and Feiss line measured in the neutral and relaxed positions. The correlation between the measures was evaluated using Pearson's test. Results: A strong correlation of the 102 feet Feiss line measurements between neutral and relaxed positions (r = 0.81) was observed, and a moderate correlation between the medial longitudinal arch angle (r = 0.78) and between navicular height in neutral and relaxed positions (r = 0.76). Conclusion: The measurements of the longitudinal medial arch between the neutral and relaxed positions are strongly correlated. Therefore, it is not necessary to measure the medial longitudinal arch in both neutral and relaxed positions. Level of Evidence II, Diagnostic Studies - Investigating a diagnostic test.

RESUMO Objetivo: O arco longitudinal medial é a estrutura principal para suporte de carga e absorção de impacto no pé. Medidas para avaliação do arco longitudinal medial, como a altura navicular, o ângulo do arco longitudinal medial e a linha de Feiss devem ser realizadas com a articulação subtalar na posição neutra e relaxada. Este estudo analisou a correlação entre as medidas da articulação subtalar em posições neutra e relaxada durante os testes de avaliação do arco longitudinal medial. Métodos: Neste estudo transversal, 51 voluntários saudáveis (102 pés; 36 mulheres; 28 ± 5 anos, 1,66 ± 0,10 m; 24,5 ± 4,5 kg/m2) tiveram altura navicular, ângulo do arco longitudinal medial e linha de Feiss medida nas posições neutra e relaxada. A correlação entre eles foi avaliada pelo teste de Pearson. Resultados: Houve uma correlação muito forte das medidas de linha de Feiss de 102 pés entre a posição neutra e relaxada (r = 0,81) e uma correlação moderada entre o ângulo do arco longitudinal medial (r = 0,78) e altura navicular nas posições neutra e relaxada (r = 0,76). Conclusão: As medidas do arco medial longitudinal entre as posições neutra e relaxada estão fortemente correlacionadas. Não é necessário, portanto, medir o arco longitudinal medial nas posições neutra e relaxada. Nível de Evidência II, Estudos diagnósticos - Investigação de um exame para diagnóstico.

Relationships Between Self-awareness and Clinical Diagnostic Findings of Abnormal Foot Arch Height in Koreans

OBJECTIVE: To see how people think about their own feet, and evaluate whether there are correlations among self-awareness of the participants and clinical examination findings. METHODS: Adult twins and their families who participated in the Healthy Twin study from May 2008 to April 2010 were recruited. Participants were asked whether they thought their feet were normal, flat, or cavus. The lateral talometatarsal angles were measured on foot X-rays to determine the foot arch height. Using the podoscopic footprints taken with the podobaroscope, the Staheli arch index was also measured. Kappa statistics were used to calculate degree of agreement among the three measurement methods. RESULTS: Self-awareness and radiographic findings were significantly different (Pearson chi-square test, p=0.000) and only slightly agreed (kappa measure of agreement=0.136, p=0.000). Self-awareness and podoscopy results revealed a significant difference (Pearson chi-square test, p=0.000), with only slight agreement (kappa measure of agreement=0.072, p=0.000). CONCLUSION: There is significant disagreement between patients' perception of their feet and actual test results. Many people may have an incorrect assumption about their own foot conditions that may be reflected in improper management. Dissemination of accurate information about foot disorders by foot clinicians would be helpful.