Total knee arthroplasty with symmetric femoral implant having double Q-angle trochlear groove
AssigneeJoint Development, LLC
InventorEric M. Dacus
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Abstract
A total knee arthroplasty includes a symmetric femoral prosthesis for articulating with a tibial prosthesis in the left or right leg of a patient. The symmetric femoral prosthesis includes an anterior flange having a symmetric and upwardly diverging, generally V-shaped, double Q-angle trochlear groove formed in an anterior side thereof for accommodating natural Q-angle tracking of a natural or prosthetic patella when the symmetric femoral component is surgically implanted in either the left or right leg of a patient. In a preferred form, the double Q-angle trochlear groove is formed with an angle of + or − about 10°, for a total groove angle of about 20°.
Claims6
A knee prosthesis, comprising:
- a symmetric femoral component for implantation into the right or left leg of an arthroplasty patient at the lower end of a patient femur, said femoral component having a symmetric pair of generally convex condyles and an anterior flange;
- a generally symmetric trochlear groove converging proximally and formed within said anterior flange and having a double Q angle for tracking of a patient patella between a fully flexed leg position generally aligned with a central vertical axis of said trochlear groove and a fully extended leg position offset in a laterally outward direction from said vertical axis;
- and
- said femoral component having a geometry defining a continuous tangential transition between said anterior flange and said trochlear groove.
Dependencies are inferred from the claim text.