Method for producing a bone replacement element

The invention relates to a method for producing a bone replacement element, wherein an image of a defect to be filled with the bone replacement element is acquired (S1), and at least one region with a specific architecture is defined within the outer contour (S3) of the defect (S3). A model is constructed for each of the regions (S4), wherein the model is defined by at least one topological parameter. Each model is constructed by defining a start model which is defined by at least one start value of the at least one topological parameter and the topological parameters are then fitted such that the model matches anatomical parameters within a predefined accuracy. The bone replacement element is then produced according to the model so obtained (S5).