A tibial implant comprising:an outer perimeter such that, upon proceeding counter-clockwise around said perimeter as viewed from above along a vertical axis, said outer perimeter further comprises a first straight edge (190);said first straight edge being followed by a first convex corner (191) that meets and is tangent to said first straight edge;said first convex corner being followed by a second straight edge or shallow arc (192) that meets and is tangent to said first convex corner, wherein an angle of said first convex corner is greater than 90 degrees but less than 180 degrees;said second straight edge or said shallow arc being followed by a second convex corner (193) that meets and is tangent to said second straight edge or said shallow arc;said second convex corner being followed by a first concave curve (194) , wherein said second convex corner transitions to said first concave curve;wherein there is a first tangent line (195) that is parallel to said first straight edge and is tangent to said second convex corner at a first tangency point (1953);wherein said first concave curve continues on from said second convex corner to become farther from said first straight edge than is said first tangent line; andwherein said first concave curve is followed by a convex curve (197) that proceeds from said first concave curve to cross said first tangent line and returns to said first straight edge to form a complete perimeter of said tibial implant.
展开▼
