Systems and methods for orthopedic implant fixation
Inventors
Casey, Niall Patrick • Cordonnier, Michael J.
Assignees
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Publication Number
US-12251320-B2
Publication Date
2025-03-18
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 fixation system for spinal implants in which a surgical planning software tool generates a three-dimensional virtual model of at least a portion of a subject’s spinal anatomy, adjusts relationships of the spinal anatomy in the virtual model to provide a corrected spinal geometry, and measures the corrected spinal anatomy in the three-dimensional virtual model to obtain one or more measurements associated with pelvic tilt, sagittal alignment, and/or lumbar lordosis. The software compares the measurements to one or more predictive guidelines that include predetermined values and determines whether the adjusted spinal anatomy conforms to the predictive guidelines.
Based on at least partially the adjusted spinal anatomy conforming to the one or more predictive guidelines, the software designs one or more patient-specific implants for achieving corrected spinal geometry when implanted in the subject. The approach includes receiving from a user one or more proposed changes to the subject’s spinal anatomy, where the proposed changes include changes to a spatial relationship between at least two vertebrae, and adjusting the subject’s spinal anatomy in the three-dimensional virtual model accordingly.
The designed patient-specific implants include a spinal implant having a patient-specific shape and at least one bone anchor configured to anchor the spinal implant to a bony structure of the patient. The patient-specific implants further include a cam configured to be rotated after the bone anchor secures the spinal implant to the bony structure to fix a relationship between the bone anchor and the spinal implant.
Claims Coverage
The excerpt includes five independent claims. The inventive coverage centers on a computer-implemented workflow for modeling and evaluating spinal anatomy and designing patient-specific spinal implants, together with a personalized spinal fixation system including bone anchoring and a cam-fixed relationship.
Three-dimensional virtual model with user-proposed vertebral relationship changes
Generating a three-dimensional virtual model of at least a portion of a subject’s spinal anatomy; receiving, from a user, one or more proposed changes to the subject’s spinal anatomy including changes to a spatial relationship between at least two vertebrae; adjusting the subject’s spinal anatomy in the three-dimensional virtual model accordingly.
Predictive guideline measurement-based evaluation of corrected spinal geometry
Measuring the adjusted spinal anatomy in the three-dimensional virtual model to obtain one or more measurements associated with pelvic tilt, sagittal alignment, and/or lumbar lordosis; comparing the one or more measurements to one or more predictive guidelines that include predetermined values to determine whether the adjusted spinal anatomy conforms.
Designing patient-specific implants to achieve corrected spinal geometry
Designing one or more patient-specific implants for achieving corrected spinal geometry when implanted in the subject, based at least partially on the adjusted spinal anatomy conforming to the predictive guidelines.
Patient-specific spinal implant with bone anchor anchoring to patient bony structure
The one or more patient-specific implants include a spinal implant having a patient-specific shape and at least one bone anchor configured to anchor the spinal implant to a bony structure of the patient.
Cam rotated after bone anchoring to fix anchor-to-implant relationship
The one or more patient-specific implants further include a cam configured to be rotated after the bone anchor secures the spinal implant to the bony structure to fix a relationship between the bone anchor and the spinal implant.
The independent claims collectively cover a software-guided spinal planning workflow and a patient-specific spinal fixation system, with user-proposed model changes, measurement against predictive guidelines, design of patient-specific implants, bone anchoring, and a cam that fixes the anchor-to-implant relationship.
Stated Advantages
Documented Applications
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