Systems and methods for orthopedic implant fixation
Inventors
Casey, Niall Patrick • Cordonnier, Michael J.
Assignees
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Publication Number
US-12245952-B2
Publication Date
2025-03-11
Expiration Date
Abstract
A personalized fixation system includes a surgical planning software tool configured to adjust relationships of relevant anatomy of a subject, at least one bone anchor, a plate having a shape that does not conform to a single plane, the plate configured to accept the at least one bone anchor, wherein the shape of the plate is at least partially determined by the surgical planning software tool, and wherein the plate includes at least one node having a hole configured to receive the at least one bone anchor, and a locking element configured to connect the at least one bone anchor to the plate, wherein the plate is manufactured using additive manufacturing.
Core Innovation
The invention provides a personalized spinal fixation system and a computer-implemented method of designing a patient-specific implant using surgical planning software. The software displays an image and/or model of at least a portion of a patient's spinal anatomy and updates the image and/or model to display a corrected spinal anatomy, including one or more changes to a spatial relationship between at least two vertebrae.
The software displays one or more predicted post-operative spinal metrics associated with the corrected spinal anatomy, including one or more of pelvic tilt, sagittal alignment, or lumbar lordosis. Based at least in part on the corrected spinal anatomy, the software designs a multi-planar patient-specific longitudinal element that includes one or more three-dimensional curved segments sized and shaped for stabilizing the patient's spine in the corrected spinal anatomy.
The surgical planning software generates fabrication instructions for manufacturing the multi-planar patient-specific longitudinal element. The disclosure further describes additive manufacturing and optionally additive/subtractive manufacturing workflow, along with embodiments of fixation plate nodes and holes, bone anchor and plate locking mechanisms, and longitudinal design/control parameters including plate surfaces, multi-section stiffness/density/porosity variation, thickness variation, and internal geometry including lattice.
Claims Coverage
The partial content includes three independent claims, each centered on using surgical planning software to generate a patient-specific corrected spinal anatomy and a corresponding multi-planar, curved longitudinal element for spinal stabilization, followed by design-to-manufacturing linkage and metric-based geometry design using predicted post-operative spinal metrics.
Corrected spinal anatomy from altered vertebral spatial relationship
Displaying an image and/or model of at least a portion of a patient's spinal anatomy; updating the image and/or model to display a corrected spinal anatomy including one or more changes to a spatial relationship between at least two vertebrae.
Predicted post-operative spinal metrics displayed for pelvic tilt, sagittal alignment, or lumbar lordosis
Displaying one or more predicted post-operative spinal metrics associated with the corrected spinal anatomy, wherein the one or more predicted post-operative spinal metrics include one or more of pelvic tilt, sagittal alignment, or lumbar lordosis.
Multi-planar patient-specific longitudinal element with three-dimensional curved segments for stabilization
Designing a multi-planar patient-specific longitudinal element based at least in part on the corrected spinal anatomy, wherein the multi-planar patient-specific longitudinal element includes one or more three-dimensional curved segments sized and shaped for stabilizing the patient's spine in the corrected spinal anatomy.
Fabrication instructions for manufacturing the multi-planar patient-specific longitudinal element
Generating fabrication instructions for manufacturing the multi-planar patient-specific longitudinal element and/or manufacturing the patient-specific longitudinal element as part of the method.
Patient-specific longitudinal element matching a virtual element generated by surgical planning software
A multi-planar patient-specific longitudinal element that matches a virtual multi-planar patient-specific longitudinal element generated by the surgical planning software, where the patient-specific element is associated with a patient-specific surgical plan for manipulating the patient's spine into the corrected spinal anatomy.
Three-dimensional curved segments designed based in part on predicted post-operative spinal metrics
The multi-planar patient-specific longitudinal element has one or more three-dimensional curved segments designed based in part on one or more predicted post-operative spinal metrics associated with the corrected spinal anatomy, including one or more of pelvic tilt, sagittal alignment, or lumbar lordosis.
Extension across at least three vertebral segments and stabilization
The multi-planar patient-specific longitudinal element is sized and shaped to extend across at least three vertebral segments and to stabilize the patient's spine in the corrected spinal anatomy.
Across the independent claims, the coverage focuses on generating corrected spinal anatomy from changes to the spatial relationship between vertebrae, displaying predicted post-operative spinal metrics, designing a multi-planar patient-specific longitudinal element with three-dimensional curved segments sized for stabilization based on the corrected anatomy and predicted metrics, and linking the designed patient-specific element to manufacturing via fabrication instructions and a patient-specific surgical plan.
Stated Advantages
Documented Applications
No documented applications found
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