Características clínicas e baropodométricas da marcha de indivíduos com hálux valgo e a influência de um procedimento cirúrgico de correção / Clinical and baropodometrics characteristics of the gait the individuals with hallux valgus and the influence of a surgical procedure of correction

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This study aims to evaluate and correlate the clinical and baropodometric characteristics of gait of subjects diagnosed with a hallux valgus deformity and verify the influence of surgical correction procedure. The participants were 26 women with different levels of hallux valgus deformity, from an orthopedic clinic in Florianopolis. The same surgical procedure for correction was made in 16 women, who were reevaluated three months after the surgery. Twenty six healthy women, without deformities on feet and lower limbs, formed the control group. Data acquisition took place at Biomechanics Laboratory of CEFID/UDESC. Instruments utilized were the American Orthopaedic Foot and Ankle Society Hallux Metatarsophalangeal Interphalangeal (AOFAS-HMI) scoring system, radiographs, a goniometer and Emed-at baropodometric platform (Novel, Gmbh, Germany). The analyzed clinical parameters were Range of Motion and radiographic measurements, such as the Hallux Valgus Angle (HVA) and Intermetatarsal Angle (IMA). The baropodometric evaluation analyzed Plantar Peak of Pressure (PPP), Mean Plantar Pressure (MPP), Contact Area (CA), Contact Time (CT), Pressure-Time Integral (PTI), Relative Load (RL), Medial-Lateral COP Displacement (COPD) and Plantar Arch Index (PAI). Descriptive statistics included mean, standard deviation, minimum and maximum. In order to verify the data normality, Shapiro-Wilk Test was used. To verify the relation between radiographic variables and baropodometric ones, Spearmans rank Correlation Coefficient was calculated. For the variable comparison between the hallux valgus group and the control one, Independent t Test or Mann-Whitney U Test were used. For the comparison of the variables before and after the surgical procedure for correction, dependent t Test or Wilcoxon Test were calculated. The adopted confiability for all comparisons was 95%. When compared to the control group, the hallux valgus participants showed an increase of PPP, MPP, PTI on first and second metatarsal regions and lateral toes. As well as a reduction on MPP and RL on fourth metatarsal and hallux. Spearmans Correlation Coefficient value shows a weak, positive and significant relation between HVA and MPP on first and fifth metatarsal bones and on third to fifth toes, as well as a weak, negative and significant relations between these variables on hallux. IMA did not show a significant correlation with any baropodometric variables. After Chevron osteotomy, a significant raise in AOFAS mean score and a significant correction of the deformity were seen, reducing HVA and IMA values. Concerning the baropodometric variables, a significant reduction was seen in PPP, MPP, PTI and RL under the first metatarsal, hallux and second to fifth toes, and a significant raise of the same variables under the fourth and fifth metatarsal bones and PTI and RL under the midfoot, second, third, fourth and fifth metatarsal bones. Furthermore, the load transference from medial to lateral region of forefoot was related to pain, lack of mobility and incapacity in transferring the load to the operated region. It was concluded that people with hallux valgus show an overload on medial and central metatarsal bones and a reduction of load on lateral metatarsal bones and an inefficacy of hallux in propulsion phase of gait, which is compensated by the other toes. Concerning the surgical correction procedure, the results demonstrated an efficacy in influencing clinical and baropodometric variables of gait. An improvement on clinical conditions of the patients was evident, as much as the deformity correction, however, the surgical procedure was not able to normalize the plantar load distribution pattern in a short-term period.

ASSUNTO(S)

educacao fisica baropodometric osteotomy hálux valgo hallux valgus baropodometria osteotomia

ACESSO AO ARTIGO

Documentos Relacionados