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fatigue failure occurs in most types of gamma-sterilized tibial inserts. Most notorious are catastrophic failures of those sterilized with gamma radiation in the air, where oxidation began during shelf storage of implants.4 Irradiation in an inert environment was a partial solution. However, gamma-irradiated PE will

Fatigue Tingling or numbness Hypomagnesemia Flushing of the skin Muscle cramps Involuntary movements of the eyes

visual inspection of the area involved. Swelling, skin changes, abnormal moles, or markings should be noted. Extraosseous involvement can be detected by palpation of the limb. The mobility of any nodules should be noted, specifically if they are firm and fixed or freely mobile. On examination, shortening or angulation