Customised assembly including at least two osteosynthesis plates which are in turn customised

Method for implanting at least two osteosynthesis plates (2) on the maxillary (10) and/or mandible of a patient during a dental occlusion operation, characterized in that, as preliminary to said operation, the results of the operation on the patient are simulated in advance, the position and shape of the osteosynthesis plates (2) are determined according to the future anatomy of the patient, an assembly (1) of at least two osteosynthesis plates is custom made, which are themselves customized according to the operation to be carried out and the future anatomy of the patient, said assembly (1) comprising a rod (3) that connects together the osteosynthesis plates (2) and that further comprises two protrusions (4) protruding from said rod (3) at a position spaced away from said plates (2) and corresponding to the lower comers (5, 6) of the patient's nasal orifice (8) and in that the surgeon implants said customized assembly (1) by placing its two protrusions (4) in the lower comers (5, 6) of the patient's nasal orifice (8), then fastens all the osteosynthesis plates (2) by means of screws penetrating the bone elements of the upper jaw or of the lower jaw in question, then cuts close to each of the osteosynthesis plates (2) of said assembly all the connecting parts formed by the rod (3) between said plates (2).