Biomet Manufacturing Corporation

Jerry J Lorio

Brian Uthgenannt

Brian A Uthgenannt

An orthopedic instrument for knee arthroplasty includes an anterior-posterior sizer assembly, a tensor assembly and a rotation mechanism. The sizer assembly includes a stylus, a sizer body including medial and lateral posterior feet extending substantially perpendicularly from the sizer body, and a sizer slider that can slide relative to the sizer body along a medial-lateral direction relative to a patient's knee. The tensor assembly includes a tensor frame having a central portion, medial and lateral wings extending at an angle from the central portion, and medial and lateral posterior feet extending substantially perpendicularly to the central portion. The rotation mechanism includes a portion coupled to the tensor frame of the tensor assembly and a portion coupled to the sizer body. The rotation mechanism is configured to rotate the medial and lateral posterior feet of the sizer body relative to the tensor frame toward a lateral side of the patient's knee.

Knee sizing and balancing instrument

A method of sizing and balancing a knee including: placing an integrated orthopedic instrument in contact with a resected distal femoral surface of a femur of a knee in flexion such that medial and lateral posterior feet of a tensor frame of the instrument are in contact with posterior condyles of the femur and such that medial and lateral posterior feet of a sizer body of the instrument are positioned on a spacer placed on a resected proximal surface of the patient's tibia; securing first and second wings extending from a central portion of the tensor frame on the resected distal femoral surface; rotating the sizer body relative to the tensor frame via a rotation mechanism that connects the sizer body and the tensor frame to balance the ligaments; and sizing the patient's femur by moving a stylus coupled to the sizer body on an anterior surface of the femur.

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Benton, AR, United States of America

Jerry J Lorio