Fig. 1
From: Joint motion of bipolar hemiarthroplasty in routine hip functional movements: a dynamic motion study
Weight-bearing simulative squat motion examination. The patients were requested to stand on the examination board with their buttocks and heels in contact with the board, which was perpendicular to the ground. Then, the patients were asked to squat down slowly and then return to the upright posture. The speed of these movements matched the speed of the X-ray tube, and fluoroscopic video imaging was performed in the sagittal plane