Bone resection guide and method

An apparatus for guiding a bone cut during knee joint replacement surgery, the knee joint comprising a tibia and a femur and having a medial/lateral axis, an anterior/posterior axis, and a proximal/distal axis, rotation about the medial/lateral axis corresponding to extension plane rotation, and rotation about the anterior/posterior axis corresponding to varus/valgus rotation, the apparatus comprising:

• a mounting base connectable to the bone in fixed relationship to the bone;
• a first cut guide defining a first cut plane, the first cut guide being hinged to the mounting base the first cut guide being rotatable about the hinge between a first position in which the first cut guide is adjacent to the bone and a second position in which the first cut guide is spaced from the bone;
• and
• an adjustment mechanism operably connected between the hinge and the first cut guide, the adjustment mechanism being operable to translate the first cut guide relative to the hinge, wherein the adjustment mechanism is operable to independently translate the first cut guide parallel to the medial/lateral axis, translate the first cut guide parallel to the proximal/distal axis, and translate the first cut guide parallel to the anterior/posterior axis relative to the hinge.

An apparatus for guiding a bone cut during knee joint replacement surgery, the knee joint comprising a tibia and a femur and having a medial/lateral axis, an anterior/posterior axis, and a proximal/distal axis, rotation about the medial/lateral axis corresponding to extension plane rotation, and rotation about the anterior/posterior axis corresponding to varus/valgus rotation, the apparatus comprising:

• a mounting base connectable to the bone in fixed relationship to the bone;
• a first cut guide defining a first cut plane, the first cut guide being hinged to the mounting base the first cut guide being rotatable about the hinge between a first position in which the first cut guide is adjacent to the bone and a second position in which the first cut guide is spaced from the bone;
• an adjustment mechanism operably connected between the hinge and the first cut guide, the adjustment mechanism being operable to translate the first cut guide relative to the hinge;
• a second cut guide defining a second cut plane, the second cut guide being mounted to the first cut guide;
• and
• a relative angle adjustment mechanism operably connected to the first and second cut guides to adjust a relative angle between the first and second cut planes.

An apparatus for guiding a bone cut during knee joint replacement surgery, the knee joint comprising a tibia and a femur and having a medial/lateral axis, an anterior/posterior axis, and a proximal/distal axis, rotation about the medial/lateral axis corresponding to extension plane rotation, and rotation about the anterior/posterior axis corresponding to varus/valgus rotation, the apparatus comprising:

• a mounting base connectable to a bone, the mounting base including an initial fixation mechanism and a secondary fixation mechanism, the initial fixation mechanism comprising a bone spike penetrably mountable to a bone in fixed relationship, the bone spike having an articulating end engageable with the mounting base for rotation about an axis, the secondary fixation mechanism comprising a pin receiving opening in the mounting base and a pin extendable through the opening to pin the base to the bone in fixed relationship;
• and
• a first cut guide defining a first cut plane characterized by an extension plane angle relative to the knee joint, the cut guide being mounted to the mounting base, the initial fixation mechanism of the mounting base being operable to rotate the mounting base relative to the bone about an axis substantially parallel to the medial/lateral axis to vary the extension plane angle of the cut plane, the secondary fixation mechanism being operable to secure the mounting base in fixed relationship to the bone to fix the extension plane angle.