Total knee replacement surgery for measuring device

摘要

PPROBLEM TO BE SOLVED: To measure an interval and balance between osteotomized surfaces at a femoral distal end and a tibial proximal end without everting the patella in an instrument for measuring the interval and the balance between the thighbone and the tibia in an artificial total knee joint replacement. PSOLUTION: An engaging plate 14 extends from a base 10, by way of an arm 12, so that the engaging plate 14 engages with the osteotomized surface near the tibial a supporting plate 22 is rotatably mounted about a central axis from a moving body 18 vertically movably to the base 10 through an arm 20. The supporting plate 22 has, at its top surface, a projected portion 48. an auxiliary guiding piece 50 is fitted on the projected portion 48 under a snap like fitted manner. A femoral component 52 to be mounted on the osteotomized surface at the femoral is mounted, at its groove portion 54, to the auxiliary guide piece 50. The engaging plate 124 and the supporting plate 22 are under an offset arrangement with respect to the base 10 and moving body 18, respectively. PCOPYRIGHT: (C)2004,JPO&NCIPI