The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2025
Filed:
Nov. 17, 2022
Lento Medical Inc., Houston, TX (US);
Ilwhan Park, Katy, TX (US);
Lento Medical Inc., Houston, TX (US);
Abstract
A computer-aided method, using a pre-operative planning software tool and patient-specific images, establishes implant parameters that customize selection of a total knee replacement prosthesis. The computer system determines from coronal, axial and sagittal image slices of a knee joint a neutral boundary axis, a set of epicondylar and trochlear features that define an elliptical cam, and a medial-lateral tibial slope, then defines from overlapping condylar and trochlear circles an ellipse with eccentricity 0.25 and focal points coincident with the circles. A knee prosthesis has a femoral component as an elliptical cam with dimensions defined by the ellipse, and has tibial and patellar components interacting with the femoral component as cam followers under knee flexion. A prosthesis is selected from a set with differing coronal asymmetry angle α to closely match the patient a as estimated from the images.