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The study presents a fragment of pilot studies showing the reconstruction of the transverse arch of the foot using a specially constructed orthosis for this purpose. It involves the mechanical reinforcement of the effect by an orthosis, which pushes down the I, IV, and V metatarsal bones while elevating or blocking the fall of the near-immobile II and III metatarsal bones according to the "three-force" rule. The correction of the transverse arch of the foot runs simultaneously with the correction of hallux valgus (HV). As a result, the significant correction of HV and associated toe deformities was achieved. In stage I foot deformity, the reduction of HV was reduced from 19.1° before to 15.1° after putting on orthosis (p = 0.024). In stage II, the reduction was from 20.1° (before) to 16.2° (after; p = 0.032). Equally satisfactory results were obtained for the remaining angles of the metatarsal bones. In the future, the method can be suitable for patients undergoing preparation for corrective HV surgery and for maintaining postoperative HV results. It can be used preventively, for example, by women who frequently wear high-heeled shoes and by those who need to remain standing for prolonged periods of time. [ABSTRACT FROM AUTHOR]