Back to results
US 11,076,872 B2Granted
Alignment devices and methods
AssigneeSmith & Nephew, Inc.
InventorZachary Christopher Wilkinson
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention include devices and methods for implanting arthroplasty devices. Some embodiments include designs that allow for use of x-ray images as the only images used to fully and accurately preoperatively and intraoperatively size and align arthroplasty device components and prepare all necessary tissue.
Claims16
A method of knee arthroplasty device implantation, the method comprising:
- evaluating one or more images of a hip and a knee of a patient to define an axis extending from between femoral condyles of a femur of the patient through a hip center of the patient;
- placing a femoral implant alignment guide against the femoral condyles such that an elongated resection aperture extending through the femoral implant alignment guide has a major axis substantially perpendicular to the defined axis;
- inserting a rod into a rod aperture extending through an offset portion of the femoral implant alignment guide when the offset portion is aligned with a point in a coronal plane of the patient that is shared with a greater trochanter of the patient such that a second axis of the offset portion is in the coronal plane and is substantially parallel to the major axis;
- inserting a needle coupled to a second portion of the rod into the patient until a tip of the needle contacts a most lateral point of the greater trochanter;
- resecting at least a portion of the femoral condyles along a plane defined by the elongated resection aperture;
- and
- coupling a femoral component of the knee arthroplasty device to the resected portion of the femoral condyles after removing the femoral implant alignment guide from the femur subsequent to the resection.
4 more elements
A method of knee arthroplasty device implantation, the method comprising:
- coupling a femoral implant alignment guide to a distal femur of a patient such that an elongated resection aperture extending through the femoral implant alignment guide has a major axis substantially perpendicular to an axis extending from between femoral condyles of the femur through a hip center of the patient and defined based on an evaluation of obtained images of anatomy of the patient;
- inserting a first portion of a rod into a rod aperture extending through an offset portion of the femoral implant alignment guide, when the offset portion is aligned with a point in a coronal plane of the patient that is shared with a greater trochanter of the patient and a second axis of the offset portion is in the coronal plane and is substantially parallel to the major axis, such that a long axis of the rod is substantially parallel to the defined axis;
- inserting a needle coupled to a second portion of the rod into the patient until a tip of the needle contacts a most lateral point of the grater trochanter;
- and
- coupling a femoral component of the knee arthroplasty device to the distal femur subsequent to inserting the needle and after resecting at least a portion of the femoral condyles along a plane defined by the elongated resection aperture and removing the femoral implant alignment guide from the femur subsequent to the resection.
2 more elements
A method of knee arthroplasty device implantation, the method comprising:
- evaluating one or more images of a hip and a knee of a patient to define an axis extending from between femoral condyles of a femur of the patient through a hip center of the patient;
- placing a femoral implant alignment guide against the femoral condyles such that an elongated resection aperture extending through the femoral implant alignment guide has a major axis substantially perpendicular to the defined axis;
- inserting a first portion of a rod into a rod aperture extending through an offset portion of the femoral implant alignment guide, when the offset portion is aligned with a point in a coronal plane of the patient that is shared with a greater trochanter of the patient and a second axis of the offset portion is in the coronal plane and is substantially parallel to the major axis, such that a long axis of the rod is substantially parallel to the defined axis;
- inserting a needle coupled to a second portion of the rod into the patient until a tip of the needle contacts a most lateral point of the grater trochanter;
- resecting at least a portion of the femoral condyles along a plane defined by the elongated resection aperture subsequent to inserting the needle;
- and
- coupling a femoral component of the knee arthroplasty device to the resected portion of the femoral condyles after removing the femoral implant alignment guide from the femur subsequent to the resection.
4 more elements
Dependencies are inferred from the claim text.