Method for providing an adapter component (31, 32) of a personalized and mobilizing external support, which support is for supporting moveably a synovial joint between a first bone group and a second bone group, the adapter component (31, 32) being configured to connect to a first and a second at least partly external auxiliary frames (12, 22), which first and second at least partly external auxiliary frames (12, 22) have been invasively attached to the first and second bone groups (10, 20), respectively, characterized by: - providing CAD models of said first and second at least partly external auxiliary frames (12, 22) in a CAD environment, - measuring the kinetic dynamics of the synovial joint by measuring the movement between the first and the second bone groups (10, 20) with the aid of a part of the first or second at least partly external auxiliary frame (12, 22) by means of a digitalization device to measure the points of movement between measurement points of the first and second at least partly external auxiliary frame (12, 22), - modelling said points of movement into a path in the CAD environment, - placing the CAD models of the first and second auxiliary frames (12, 22) on the path in the CAD environment, - providing a CAD model of an external auxiliary joint, which permits the path, as part of the external support, - placing the CAD model of the external auxiliary joint in the CAD environment such that axis of the auxiliary joint coincides with the axis of the modelled path, - providing an external auxiliary joint according to the CAD model, - designing at least one external adapter component (31, 32) in the CAD system to connect the auxiliary joint to the first or second auxiliary frame (12, 22), and - manufacturing the at least one external adapter component (31, 32) according to the CAD design in a 3D printer, by an instant manufacturing method or in a CAD-CAM system. - providing CAD models of said first and second at least partly external auxiliary frames (12, 22) in a CAD environment, - measuring the kinetic dynamics of the synovial joint by measuring the movement between the first and the second bone groups (10, 20) with the aid of a part of the first or second at least partly external auxiliary frame (12, 22) by means of a digitalization device to measure the points of movement between measurement points of the first and second at least partly external auxiliary frame (12, 22), - modelling said points of movement into a path in the CAD environment, - placing the CAD models of the first and second auxiliary frames (12, 22) on the path in the CAD environment, - providing a CAD model of an external auxiliary joint, which permits the path, as part of the external support, - placing the CAD model of the external auxiliary joint in the CAD environment such that axis of the auxiliary joint coincides with the axis of the modelled path, - providing an external auxiliary joint according to the CAD model, - designing at least one external adapter component (31, 32) in the CAD system to connect the auxiliary joint to the first or second auxiliary frame (12, 22), and - manufacturing the at least one external adapter component (31, 32) according to the CAD design in a 3D printer, by an instant manufacturing method or in a CAD-CAM system.