Application of Machining Principles: Use of the Questor Saw Jig in TKR for Severe Valgus Hyperextension Osteoarthritis of the Knee

  • T. Derek V. Cooke


This case report concerns a 65-year-old female with severe bilateral knee OA and the application of machining technology in her treatment with a total knee replacement (TKR). Ten years before, this patient had had bilateral patellectomies. On the right this was complicated by an iatrogenic rupture of the quadriceps mechanism such that she could not actively extend the knee. She developed increasingly severe pain due to OA which was much greater on the left. The right knee was in varus and only stable when standing in extension. She could get around only with a walker and this caused terrible pain in the lateral compartment of the left knee. Standardized radiographs confirmed severe valgus and hyperextension of the left knee with collapse of the lateral compartment; a widely gaping medial compartment and some anterior subluxation of the tibia was also noted (Fig. 1a, b).


Posterior Cruciate Ligament Total Knee Replacement Medial Collateral Ligament Lateral Compartment Valgus Deformity 
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  1. 1.
    Cooke TDV, Harada Y, Saunders G, Sliu D, Wevers H, Yoshioka YG (1988) Application of bench mounted saws for precision replacement arthroplasty of the arthritic knee — the Questor systems. In: Second Congress of the European Society (eds) Surgery and arthroscopy of the knee. Müller/Hackenbruch, Springer-Verlag, Berlin HeidelbergGoogle Scholar

Copyright information

© Springer-Verlag Tokyo 1989

Authors and Affiliations

  • T. Derek V. Cooke
    • 1
  1. 1.Clinical Mechanics GroupQueen’s UniversityKingstonCanada

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