Knee joint laxity can result from soft tissue injury, such as a ligament tear, or from genetic factors such as joint hypermobility syndrome and various forms of Ehlers–Danlos Syndrome. Stress radiographs have been used for several years to detect the amount of varus/valgus knee laxity in the knee joint. The popularity of radio graphic methods of monitoring the knee joint has, however, been adversely affected by the X-ray exposure of an assistant that performs the stress imaging. They are also used to evaluate the degree of compartmental involvement in degenerative osteoarthritis. The cruciate ligaments are thought to be a secondary stabilization mechanism in the varus/valgus orientation [1,2]. Stress X-rays are an essential component of the assessment of a patient with a knee ligament injury. Such X-rays provide an objective measure for determining the extent of an injury prior to surgery; assessing...

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