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What is a Flat Foot?
Flatfoot is an extremely common pathology in western society. This pathology is determined by the triplanar deformity with fulcrum on the sub-astragalic joint, characterized by the fall of the plantar vault and the valgus pronation of the calcaneus.
During the first stage of walking, which goes from 10 months of life up to 3-4 years, this situation is completely normal and is part of normal growth of the foot, in fact, it will correct spontaneously until 6-8 years of age.
WHAT IS THE INTERVENTION OF ASTRAGALIC ARTHRORISIS?
The intervention with the expanding prothesis is one of the interventions of arthrorisis endo-sinus-tarsic “in support of the neck”, which are, those interventions that aim to correct the reciprocal position of the talus on the calcaneus without affecting the astragalus-calcaneal joint. The method involves the placement of an expandable cylinder inside the tarsus sinus. The expansion stabilizes the connections between astragalus and calcaneus, helping the correction of the listhesis of the head of the astragalus, with consequent correction of the excessive pronation of the backfoot in patients during the growing years, so that the calcaneus and astragalus are remodeled to reach a stable conformation. It also performs a neuro-propioceptive function of correction of the backfoot axis, as demonstrated by the fact
that correction is maintained even after removal of the device.
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