This study develops the construction and validation of a reliable functional screening score in LCA ruptures in the immediate post-traumatic period. This score, realizable in an emergency, would be an early warning signal requiring an emergency consultation with an orthopedic surgeon. It would be a tool for screening acute LCA ruptures at a time when ligament testing maneuvers are too painful to be contributory to the diagnosis. It would avoid a premature return to dangerous activity for the knee with a rupture of the LCA. The other impact would be economical since it would avoid the realization of unnecessary MRI. On the other hand, it will allow patients with LCA rupture to have faster access to MRI. The hypothesis of the study is that a validated functional score would make it possible to sort the patients in the emergencies and to prescribe the MRI only in the cases of effective rupture of the LCA.
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Reference method or "gold standard"
Timeframe: Between 7 days and 2 months after the accident.