Method for Modeling Glenoid Anatomy and Optimization of Asymmetric Component Design
AssigneeMayo Foundation for Medical Education and Research
InventorJohn W. Sperling
Life of this patent
Estimating the term…
Abstract
Glenoid components with asymmetric fixation points are provided. Also, methods and devices are provided for the optimization of shoulder arthroplasty component design through the use of medical imaging data, such as computed tomography scan data. The methodology may improve the understanding of glenoid anatomy through the use of medical imaging data and 3D modeling, and for glenoid components that exploit this methodology. The methodology provides for how anatomical features change based on the specific location in the glenoid. The methodology can optimize loading and fit at the bone-device interface. Asymmetrical glenoid components are provided with significantly improved initial fixation.
Claims28
A prosthesis comprising:
- a central body having a longitudinal axis normal to a reference plane that extends through the central body;
- a plurality of projections extending from an outer surface of the central body, wherein the plurality of projections provide fixation for the prosthesis in a bone of a subject and are asymmetrically spaced in the reference plane around the outer surface of the central body.
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A prosthesis comprising:
- a central body having a longitudinal axis normal to a reference plane that extends through the central body;
- a plurality of fixation sites extending through the central body from an outer surface of the central body, wherein the plurality of fixation sites are configured to receive a bone screw to provide fixation for the prosthesis in a bone of a subject, and
- wherein the plurality of fixation sites are asymmetrically spaced in the reference plane around the outer surface of the central body.
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A method for manufacturing a prosthetic component for replacing a part of a bone of a joint in a subject, the method comprising:
- forming the prosthetic component to include a vertical length and a horizontal length, the vertical length and the horizontal length of the prosthetic component having been determined by
- (a) creating a three dimensional model from one or more scans of the bone of the joint;
- (b) positioning on the model a reference plane that extends to an outer surface of the model;
- (c) orienting on an image including the reference plane a first reference line that extends from a first border of the bone to an opposite second border of the bone at a maximum length of a cavity of the bone;
- (d) orienting on the image a second reference line that extends from a third border of the bone to an opposite fourth border of the bone, wherein the second reference line is perpendicular to the first reference line in the reference plane at a maximum width of the cavity of the bone;
- (e) orienting on the image a third reference line that extends from a most medial point of the cavity of the bone to the reference plane;
- (f) determining the vertical length of the prosthetic component from a first length of the first reference line;
- (g) determining the horizontal length of the prosthetic component from a second length of the second reference line;
- (h) determining a depth of the prosthetic component from a third length of the third reference line.
Dependencies are inferred from the claim text.