With the addition of the chair model, the JACE Shoulder chair CMP achieves internal and external rotation as well as elevation (forward flexion).
凭借椅子一样外型，该产品可以实现内部和外部的轮换以及提升（向前弯曲）。
External rotation of the femoral and tibial components has been advocated to improve patella tracking and flexion gap balance while maintaining congruency between the tibial and femoral components.
提倡股骨和胫骨假体外旋以改善髌骨轨迹和屈曲间隙平衡，在胫骨和股骨假体间保持一致性。当对称性的股骨假体外旋时，可以产生股骨前外侧切割现象。
External rotation of the femoral and tibial components has been advocated to improve patella tracking and flexion gap balance while maintaining congruency between the tibial and femoral components.
提倡股骨和胫骨假体外旋以改善髌骨轨迹和屈曲间隙平衡，在胫骨和股骨假体间保持一致性。当对称性的股骨假体外旋时，可以产生股骨前外侧切割现象。
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