Patent ID: 11911050
Assignee: KNIMBLE DESIGNS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. A system for total knee replacement comprising:
a first alignment guide:
configured to locate on a first bone of a joint in extension;
defining a first set of pin guides configured to guide location of a first set of pins on the first bone; and
defining a first reference surface relative to the first set pin guides;

a second alignment guide:
configured to locate on a second bone of the joint in extension;
constrained relative to the first alignment guide by the first reference surface; and
defining a second set of pin guides, relative to the first set pin guides, configured to guide location of a second set of pins on the second bone; and

a first cut guide:
configured to locate on the first bone via the first set of pins; and
defining a first cut plane for resecting the first bone to form a first resected face on the first bone;

a second cut guide:
configured to locate on the second bone via the second set of pins; and
defining a second cut plane, linearly offset from the first cut plane, for resecting the second bone to form a second resected face on the second bone;

a third alignment guide:
configured to insert between the first bone and the second bone in partial flexion;
comprising a first side configured to mate with the first resected face;
comprising a second side angularly offset from the first side by an intermediate angle and configured to mate with the second resected face; and
defining a third set of pin guides, relative to the first side and the second side, configured to guide location of a third set of pins on the second bone;

a third cut guide:
configured to locate on the third set of pins; and
defining a posterior cut plane, angularly offset from the second resected face, for resecting a posterior structure of the first bone to form a third resected face on the second bone;

a conforming bearing:
defining a concave face configured to mesh with a convex face of a first artificial joint component installed over the first resected face of the first bone;
defining a second face, opposite the convex face, configured to slide on the first resected face to seat in a ligament-balancing position on the first resected face as the first bone is moved over a range of motion relative to the second mode; and
defining a fourth set of pin guides configured to guide location of a fourth set of pins on the first bone; and

a fourth cut guide:
configured to locate on the first bone via the fourth set of pins; and
defining a longitudinal cut axis for boring the first bone to receive a stem of the first artificial joint component.