A computer-implemented method for modelling a patient-individualised denture part, wherein the method comprises: • providing a digital three-dimensional patient situation model, wherein the patient situation model defines patient-specific delimiting surfaces (120, 121) of one or more objects of a set of the patient's teeth which define a patient situation geometry to which the denture part is to be adapted during the course of the modelling, • providing a first digital three-dimensional denture part model in a starting state, wherein the first denture part model defines denture part-specific delimiting surfaces of the denture part which define a denture part geometry, wherein the first denture part model, in the starting state, has a denture part geometry in the form of a starting geometry, • providing one or more geometric adaptation criteria defined using the patient-specific delimiting surfaces, which criteria must be satisfied by the denture part-specific delimiting surfaces during the course of a patient-individualised adaptation of the denture part geometry to the patient situation geometry, • adapting the denture part geometry of the first denture part model to the patient situation geometry of the patient situation model in a patient-individualised manner, wherein the patient-individualized adaptation process comprises arranging the first denture part model in a starting position provided by the patient situation model for the denture part, wherein the patient-individualized adaptation process also comprises repeatedly interactively making user-defined changes to the arranged first denture part model, wherein the first denture part model dynamically passes through a sequence of intermediate states during the course of each of the user-defined changes until a change state resulting from each user-defined change is reached, wherein, for each of the corresponding intermediate states and also the resulting change state, a state-specific state geometry of the first denture part model is automatically calculated from the starting geometry of the first denture part model whilst satisfying the geometric adaptation criteria, wherein each of the user-defined changes is displayed by means of a graphical user surface on a display device, wherein each display of a user-defined change comprises a display of the first denture part model dynamically passing through the relevant sequence of intermediate states until the corresponding change state has been reached, with the relevant state-specific state geometries calculated for this, • using a change geometry resulting from the patient-individualised adaptation of the first denture part model to provide a patient-individualised denture part geometry for the production of the patient-individualised denture part. • providing a digital three-dimensional patient situation model, wherein the patient situation model defines patient-specific delimiting surfaces (120, 121) of one or more objects of a set of the patient's teeth which define a patient situation geometry to which the denture part is to be adapted during the course of the modelling, • providing a first digital three-dimensional denture part model in a starting state, wherein the first denture part model defines denture part-specific delimiting surfaces of the denture part which define a denture part geometry, wherein the first denture part model, in the starting state, has a denture part geometry in the form of a starting geometry, • providing one or more geometric adaptation criteria defined using the patient-specific delimiting surfaces, which criteria must be satisfied by the denture part-specific delimiting surfaces during the course of a patient-individualised adaptation of the denture part geometry to the patient situation geometry, • adapting the denture part geometry of the first denture part model to the patient situation geometry of the patient situation model in a patient-individualised manner, wherein the patient-individualized adaptation process comprises arranging the first denture part model in a starting position provided by the patient situation model for the denture part, wherein the patient-individualized adaptation process also comprises repeatedly interactively making user-defined changes to the arranged first denture part model, wherein the first denture part model dynamically passes through a sequence of intermediate states during the course of each of the user-defined changes until a change state resulting from each user-defined change is reached, wherein, for each of the corresponding intermediate states and also the resulting change state, a state-specific state geometry of the first denture part model is automatically calculated from the starting geometry of the first denture part model whilst satisfying the geometric adaptation criteria, wherein each of the user-defined changes is displayed by means of a graphical user surface on a display device, wherein each display of a user-defined change comprises a display of the first denture part model dynamically passing through the relevant sequence of intermediate states until the corresponding change state has been reached, with the relevant state-specific state geometries calculated for this, • using a change geometry resulting from the patient-individualised adaptation of the first denture part model to provide a patient-individualised denture part geometry for the production of the patient-individualised denture part.