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A graph shows greater improvement in hip flexor internal moment for the patients who had the mini-posterior THA (p = 0.02) and trends for improved extensor internal moment (p = 0.12) and improved external rotator internal moment (p = 0.10) on level ground from preoperatively to 1 year postoperatively when compared with the patients who had the two-incision THA. ABD = abduction; ADD = adduction; FLX = flexion; EXT = extension; INT ROT = internal rotation; EXT ROT = external rotation
