Manufacturing bone prosthesis for filling gaps of all/part of bone of patient, comprises digitalizing patient using three-dimensional medical acquisition device by magnetic resonance, defining prosthesis, and manufacturing the prosthesis

The method comprises digitalizing the patient using a three-dimensional medical acquisition device such as a scanner or an imagery device by magnetic resonance during establishing a file such as osseous representative of remaining osseous volumes of the patient, defining the prosthesis during defining a file such as prosthesis, representative of the shape of the final prosthesis, according to which the final prosthesis comprises a part of replacement of the bone gaps of the patient, and manufacturing the prosthesis during transfer of the prosthesis file towards the rapid prototyping machine. The method comprises digitalizing the patient using a three-dimensional medical acquisition device such as a scanner or an imagery device by magnetic resonance during establishing a file such as osseous representative of remaining osseous volumes of the patient, defining the prosthesis during defining a file such as prosthesis, representative of the shape of the final prosthesis, according to which the final prosthesis comprises a part of replacement of the bone gaps of the patient, manufacturing the prosthesis during transfer of the prosthesis file towards the rapid prototyping machine comprising a laser gun that is guided in response to information of the prosthesis file in a prototype powder layer to operate a fusion with the selective laser part of each layer so as to manufacture a section of a support and/or a section of prosthesis, and performing finishing step. The part is obtained from the bone file of the patient by symmetry of bone parts corresponding to the patient and/or from the bone file of an intact model by transposition of the bone parts of the models. The file comprises a support for manufacturing the prosthesis to realize a succession of the cross-sections thickness whose stack determines the shape of the prosthesis, and instructions series for a laser beam of rapid prototyping machine intended to allow the manufacturing of the support and prosthesis. In the manufacturing step, synthetic prototyping powder is used and has an increased rigidity. Recesses are filled by a three-dimensional grid forming an alveolate structure intended to allow colonization of the grid by bone cells of the patient. An independent claim is included for a bone prosthesis. L'invention propose un prothèse osseuse (14) destinée à combler les manques osseux de tout ou partie d'un os (10) d'un patient, obtenue au moins par prototypage rapide dans une machine de prototypage rapid