Disclosed embodiments relate to a customized assembly of osteosynthesis plates. The customized assembly of osteosynthesis plates is custom-made, for example I-shaped and/or L-shaped and/or cross-shaped and/or crow's-foot-shaped ones which are themselves customized according to the operation to be carried out and the future anatomy of the patient, characterized in that the osteosynthesis plates are connected together by a rod, the rod further comprising two protrusions (4) protruding from the rod towards the nasal orifice (8) of the patient into positions that correspond to the two ends (5, 6) of the base (7) of the nasal orifice (8) of the patient. The invention can be used during dental occlusion operations, for example.