1. Ankle orthosis containing the lower part (10), which has a sole (11) for receiving the foot, and the lower part (20), which when put on, is applied to the shin in front and connected to the lower part (10) using a spring element ( 30), characterized in that the spring element (30) behind the ankle region (40) forms the articular region (35), which allows the lower leg (20) to move relative to the lower part (10) in the anteroposterior direction. 2. An ankle orthosis according to claim 1, characterized in that the spring element (30) passes medially. 3. An ankle orthosis according to claim 1 or 2, characterized in that the articular region (35) is made resistant to twisting around the proximal-distal axis. 4. An ankle orthosis according to claim 1 or 2, characterized in that the articular region (35) is made rigid in bending in the medial lateral direction. An ankle orthosis according to claim 1 or 2, characterized in that the spring element (30) extends dorsally diagonally from the lower part (10) and ventrally diagonally upstream of the ankle region (40). 6. An ankle orthosis according to claim 1 or 2, characterized in that the spring element (30) has a narrowing (36) in the anteroposterior direction. An ankle orthosis according to claim 1 or 2, characterized in that the spring element (30) in the anteroposterior direction has a lower moment of resistance than in the medial-lateral direction. An ankle orthosis according to claim 1 or 2, characterized in that the spring element (30) in the articular region (35) has a structure of material that has greater flexibility in the anteroposterior direction than in the medial-lateral direction. An ankle orthosis according to claim 1 or 2, characterized in that the ankle part (20) is made in the form of a trough or bowl, and in the medial plane it1. Голеностопный ортез, содержащий нижнюю часть (10), которая имеет подошву (11) для приема ступни, и голенную часть (20), которая в надетом состоянии накладывается на голень спе
