Method of preparation individual instrument for knee arthroplasty

Objective. To improve the results of total knee arthroplasty by developing a methodology for design and manufacture an individual instrument implants accuracy installation. Methods. An analysis literature on various concepts alignment was carried out. In practice, one them chosen depending clinical case. For preoperative planning, CT scan lower extremities performed with capture pelvis or hip joint; feet completely up to calcaneus (CT 64 128 slices were used better visualization increased accuracy). With help RadiAnt DICOM, 3D model converted into STL file, which uploaded FreeformPlus program, where planning done. The program allows not only assess presence varus valgus deformity limb, determine its degree, but also other deformities legs. after assessing deformity, we perform using concepts: anatomical, mechanical, kinematic. After choosing concept virtual correction prepare print is additive technology. addition, joint parts femur tibia, surgeon orient himself intraoperatively. Results. Thanks completed work software, it possible increasing installing. developed technique 3D-design tool allowed us use any high accuracy. Preoperative increases understanding because himself, engineer, does it. Conclusions. Developed three-dimensional modeling extremity makes correctly plan, put practice patient specific arthroplasty, taking account characteristics extremity.