Implant Bearings in Total Knee Arthroplasty

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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…

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Restoration of Stability, Maintaining Joint Line, Gap Balancing, and Constraint Selection Through the Use of a Trial Cutting Guide

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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,…

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Femoral Alignment and Femoral Rotation

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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,…

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Tibial Alignment

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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…

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Salvage Knee Surgery: Arthrodesis

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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…

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Aseptic Synovitis

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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…

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Hinge Implants

Jan 24, 2018 by in ORTHOPEDIC Comments Off on 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…

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