The present invention provides a method and a device for producing an orthosis model for a patient. The method comprises the input of patients' data, the determination of a curvature type of the patient's spine to be treated from a predefined number of curvature types in dependence on the patient's data, and the selection of at least one orthosis model from a predefined number of models of orthoses in dependence on the specific curvature type. The device comprises a data input device being designed for inputting patients' data, a data base containing a number of curvature types and a number of orthoses models, a curvature determination device designed to determine a curvature type from the data base in dependence on the patients' data, and an orthosis model selection device designed to select at least one orthosis model from the data base in dependence on the determined curvature type.