Patent ID: 9370375
Filing Date: 2016-06-21
CPC Classification: A61B,A61F

Claim Text:
1. A surgical instrument comprising: a pre-cut trial configured to be mounted during an artificial knee joint replacement operation on a resected surface of a pre-cut line cut shallower than a genuine cut line by a pre-cut trial pin configured to be inserted in the resected surface, so that extension and flexion of femur and tibia can be observed and that it can be judged whether or not a genuine implant is appropriate, a pre-cut guide configured to be mounted on the end resected surface defined by the genuine-cut line or the pre-cut line; a femoral sizer configured to be seated in and fitted to anterior and posterior condyles of the femur; a pre-cut guide guide-pin configured to be inserted in the end resected surface through an insertion hole formed in the femoral sizer; and a resection instrument configured to be inserted from the insertion hole, wherein the resected surface comprises an end resected surface, which is perpendicular to a bone axis, posterior and anterior resected surfaces, which are parallel to the bone axis, a posterior chamfer-resected surface connecting the end resected surface and the posterior resected surface, and an anterior chamfer-resected surface connecting the end resected surface and the anterior resected surface; said pre-cut trial is configured to be mounted on part or all of said genuine-cut line or part or all of said pre-cut line; and at least the posterior chamfer-resected surface and posterior resected surface are formed by performing genuine-cut or pre-cut by inserting the resection instrument into the insertion hole.