Patient specific surgical guide locator and mount
A resection guide locator includes a bone engagement portion with surfaces that are complementary to the surface topographies of a bone to be resected during surgery. A housing includes a socket defined by a resilient annular wall that is sized and arranged so to accept a resection guide by press-fit to thereby position and hold the resection guide within the socket. The resection guide is maintained in a predetermined, preferred position while the surfaces are releasably locked in position on the bone. A method is disclosed for forming and using the resection guide locator.
1. A resection system configured for making a distal resection of a bone of a femur, said bone having localized anatomical surface features prior to resection, comprising:
a resection guide locator including a body having a bone engagement portion with a surface comprising localized features that are topographically complementary to said localized anatomical surface features of said bone of said femur,
the body including opposing medial and lateral wings, the wings extending outwardly from the body,
the body defining a recess, the recess being a socket defined by an annular wall,
the annular wall including an upper wall, a lower wall, and opposing medial and lateral side walls, the medial and lateral side walls disposed between the upper and lower walls, the medial side wall disposed in the medial wing, the lateral side wall disposed in the lateral wing, the upper wall offset from the medial and lateral side walls such that a length of the upper wall is less than a distance between the medial and lateral side walls, and an elongate slot within the recess,
a resection guide having a body defining a resection slot, at least a portion of the resection guide body sized and configured to be received within the recess defined by the resection guide locator,
wherein the resection guide locator and the resection guide are formed from different materials, and wherein the resection slot defined by the resection guide aligns with the elongate slot defined by the resection guide locator when the resection guide is received within the recess defined by the resection guide locator, the resection slot positioned for making said distal resection of said bone of said femur when the resection guide is received within the recess of the resection guide locator.
2. The resection system of claim 1 , wherein the resection guide locator includes a yoke including first and second arms that extend from the body in a direction that is different from the direction in which the pair of wings extend.
3. The resection system of claim 2 , wherein each of the first and second arms defines a respective through bore.
4. The resection system of claim 3 , wherein each wing of the pair of wings defines a respective through bore.
5. The resection system of claim 1 , wherein the resection guide locator is formed from a resilient polymer material and the resection guide is formed from a metal.
6. The resection system of claim 1 , wherein the localized features of the bone engagement portion are complementary to said localized anatomical surface features of an articular surface of said bone.
7. The resection system of claim 1 , wherein the localized features of the bone engagement portion are complementary to said localized anatomical surface features of a condylar surface of said bone.
8. The resection system of claim 1 , wherein the localized features of the bone engagement portion are complementary to said localized anatomical surface features of a cortical surface of said bone.
9. The resection system of claim 1 , further comprising the recess having a back wall, the elongate slot formed through the back wall and extending between the opposing side walls.
10. The resection system of claim 1 , further comprising the resection guide having a stem projecting downward therefrom, and the resection guide locator having a groove defined in an outer surface of the base below the lower wall, the groove configured for accommodating the stem of the resection guide.
11. The resection system of claim 10 , wherein the groove is centrally located with respect to the recess.
12. The resection system of claim 1 , wherein the upper wall of the annular wall adjoins the medial side wall via an L-shaped portion of the annular wall and further adjoins the lateral side wall via an opposing L-shaped portion of the annular wall.