The second method is to move upper and lower teeth by archwire lingually and bucally.
二是利用上下颌的正畸弓丝移动上下牙齿向颊、舌方向；
Please move the brush downwards on the upper teeth and upwards on the lower teeth.
刷上颌时牙刷当背上挪动，刷下颌时牙刷当背下移静。
Please move the brush downwards on the upper teeth and upwards on the lower teeth.
刷上颌时牙刷当背上挪动，刷下颌时牙刷当背下移静。
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