What level of amputation can lead to an equinus gait deformity?

An equinus gait deformity, characterized by limited dorsiflexion at the ankle joint, can indeed result from a Lisfranc amputation. In a Lisfranc amputation, the midfoot is removed, which can significantly alter the biomechanical function of the foot and ankle. This alteration can hinder the normal range of motion needed for effective dorsiflexion during the gait cycle.

The Lisfranc region includes critical joints and bones that contribute to the foot's ability to functionally adapt during walking and running. When these structures are compromised through amputation, particularly at the midfoot, the remaining soft tissue and bony lever arms may not allow for appropriate dorsiflexion. As a result, the individual may develop compensatory movements that lead to the equinus gait, wherein they walk on their toes rather than allowing the heel to strike the ground first, further emphasizing the abnormal gait pattern.

Other amputation types, such as transmetatarsal or Chopart, while they do affect foot mechanics, do not typically result in equinus gait as significantly as a Lisfranc amputation because the necessary structures that provide balance and toe-off dynamics remain more intact. Above-knee amputations impact the gait significantly too, but they involve