چکیده:
The purpose of this study was to compare the shear and compressive forces of the ankle joint in individuals with flat and high arches. 30 female students (10 with flat feet, 10 with high arches, 10 with normal arches) with a mean age of 23 ± 1.7 years, height of 165 ± 2.5 cm, and weight of 53 ± 2.5 kg participated in this study. Shear and compressive forces of the ankle joint were calculated using inverse dynamics. The Navicular Drop Test was used to measure the degree of foot arch. One-way ANOVA with repeated measures was used to test the hypotheses (P ≥ 0.005). Statistical results showed that there is a significant difference between the high arch and normal arch, the high arch and flat arch, and also between the normal arch and flat arch in the compressive force of the ankle joint (P > 0.0001). Also, the findings showed that there is a significant difference between the high arch and flat arch (P = 0.029) and the normal arch and flat arch in the shear force of the ankle joint (P = 0.0001). No significant difference was found between the normal arch and the high arch in the shear force of the ankle joint (P = 0.163). Accordingly, increased compressive force of the ankle joint may be a predisposing factor for ankle sprains and bone injuries in high-arched feet.
خلاصه ماشینی:
Assistant Professor of Mazandaran University Abstract The aim of this study was to compare the shear and compressive forces of the ankle joint in individuals with flat and cavus feet.
Considering that GRF is an important factor in the forces applied to the joint, such as shear and compressive force, it can be said that changes in the structure of the foot may also affect joint forces, which may ultimately lead to changes in gait pattern and subsequent injury to the lower limb.
Therefore, the hypothesis of the present study is that changes in the arch shape of the foot may change the direction of the GRF vector applied to the foot during gait initiation and, consequently, affect the amount of bone-to-bone forces (shear and compressive) applied to the ankle joint.
Since, according to the authors' information, the amount of bone-to-bone forces of the ankle joint has not been measured in individuals with high and low arches, the aim of the present study is to measure the shear and compressive forces of the ankle joint in individuals with flat and cavus feet and compare them with normal feet.
(Refer to the image on the page) Table 2 shows the mean and standard deviation of shear and compressive forces of the ankle joint in three foot arch groups.
The results of the present study indicate that the cavus foot and flat foot groups showed the highest and lowest values, respectively, in both compressive and shear forces.
Also, studies have shown that the shear force of the ankle joint during walking in individuals with a normal foot can be 0.
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