A method for preparing the reconstruction of a damaged bone structure using an implant, comprising the following steps which are carried out by a computer (2): a) performing atlas segmentation on a structure dataset which represent the structure to be reconstructed, and determining healthy objects and defective objects within the damaged structure b) determining a target structure by modelling replacements for the defective objects within the damaged structure c) selecting an implant on the basis of the target structure, and providing a shape dataset which represents the shape of the implant d) positioning the selected implant in order to find the optimum implant position e) determining whether or not the selected implant is suitable, and returning to step c) if the implant is determined to not be suitable and f) exporting the suitable implant to a medical navigation process.
