Implant Bearings in Total Knee Arthroplasty
Primary Revision Total Knees 759,600 89,000 848,600 Hips 492,900 58,400 551,300 Total 1,252,500 147,400 1,399,900 Data from Orthopaedic Network News [1] The Triad: The Implant The Evolution of UHMWPE…
Restoration of Stability, Maintaining Joint Line, Gap Balancing, and Constraint Selection in Revision Total Knee Arthroplasty
Fig. 14.1 x, y, and z axes. The three-dimensional universe can be plotted on the axes: x, y, and z. Considering that objects in space may either translate (move to…
Restoration of Stability, Maintaining Joint Line, Gap Balancing, and Constraint Selection Through the Use of a Trial Cutting Guide
Fig. 16.1 Stress X-ray indicating degree of medial opening in a painful TKA Classification System for Instability Parrate and Pagnano defined three types of instability after TKA—extension instability, flexion instability,…
Femoral Alignment and Femoral Rotation
Fig. 11.1 The LE axes (from Pollice P, Lotke P, Lonner J. Principle of instrumentation and component alignment. In: The adult knee. Philadelphia: Lippincott, Williams & Wilkins; 2003. p. 1085–93,…
Tibial Alignment
Fig. 12.1 Massively obese 70-year-old woman with early mechanical failure following TKA. Varus alignment of the tibial component contributed to mechanical overloading of the medial compartment Fig. 12.2 Proper alignment…
Total Knee Arthroplasty After Failed High Tibial Osteotomy
Fig. 20.1 An AP radiograph of a previous HTO with nonunion, retained broken hardware, proximal tibial bone loss, and a sloping joint line The key issues that potentially influence the…
Salvage Knee Surgery: Arthrodesis
Fig. 28.1 A 70-year-old man with successful arthrodesis following failed two-stage reimplantation Advantages of the intramedullary rod technique include immediate weight bearing and easier rehabilitation, avoidance of external transfixation pins…
Aseptic Synovitis
Fig. 25.1. Thinning of the polyethylene tibial insert is evident with visible joint space narrowing. Significant osteolysis is seen in the tibial, most prominently anteriorly and inferiorly to the tibial…
Hinge Implants
Fig. 22.1 Walldius Mark IV prosthesis (From Jones GB. Total knee replacement-the Walldius hinge. Clinical Orthopedics and Related Research. 1973 Jul-Aug(94):50–7, with permission) The long-term clinical results with the Walldius…
Management of Extensor Mechanism during Revision Total Knee Arthroplasty
Fig. 15.1 Lateral incision with a full-thickness medial flap should be utilized when multiple incisions are present. The medial parapatellar approach is performed easily despite the lateral skin incision. Fig….
