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Maximal active knee flexion obtained daily during the first week, at 6 weeks, and at 3 months in each group. The maximal amplitude of knee flexion reached over the first 7 days after surgery was significantly greater in the Ketamine group than in the Control group (P < 0.02). No significant differences were noted for active knee flexion values among the two groups at the 6 weeks and 3 months examinations. Data are expressed in degrees as means ± SDs.
