Orthognathic implant and methods of use
An implant for use in orthognathic surgery of a mandible may include a longitudinal plate member and a plurality of pre-configured guides coupled to the plate member. The longitudinal plate member is pre-bent to correspond to the post-operative shape of the mandible; and the guides are pre-configured to align the plate member with the mandible when the implant is positioned against the mandible after the mandible has been separated.
1. An osteotomy guiding implant of a bone plate system that also includes a bone fixation implant, wherein the osteotomy guiding implant is configured to be secured to the maxilla, the osteotomy guiding implant comprising:
a plate member that is pre-shaped to correspond to a pre-operative shape of a first portion of the maxilla, the plate member, pre-operatively, defining non-linear undulations that match particular surface portions of the maxilla such that the non-linear undulations are configured as an alignment mechanism that aligns the plate member with the maxilla;
a template portion extending from the plate member that is shaped pre-operatively to match a pre-operative shape of a second portion of the maxilla, the template portion defining an osteotomy cutting guide path in the maxilla so as to define a boundary that separates the first portion of the maxilla from the second portion of the maxilla, whereby the first portion becomes segmented from the second portion after a cutting instrument has cut through the maxilla along the osteotomy cutting guide path,
wherein the osteotomy guiding implant defines a screw hole that is configured to receive a bone screw so as to secure the osteotomy guiding implant to the maxilla.
2. The osteotomy guiding implant of claim 1 , wherein the template portion comprises a plurality of fingers that combine to define the cutting path.
3. The osteotomy guiding implant of claim 2 , wherein each of the fingers defines an aperture, such that the apertures of the fingers define the cutting path.
4. The osteotomy guiding implant of claim 1 , wherein the plate member defines a plurality of apertures configured to receive a drill.
5. The osteotomy guiding implant of claim 4 , wherein the at least one aperture of the plate member is vertically aligned with one of the fingers.
6. The osteotomy guiding implant of claim 1 , wherein the plate member includes a reference hole.
7. The osteotomy guiding implant of claim 1 , wherein the fingers include non-linear undulations that correspond to particular portions of the second portion of the maxilla.
8. The osteotomy guiding implant of claim 1 , wherein the plate member defines the screw hole.