Generally, line carving is to introduce absorbable medical thread through the face, introduce thread under the dermis and under the skin, and then pull it in different directions to produce skin tension and restore the skin to a young state. After the lead is completely absorbed and degraded by the human body after 6-8 months of introduction, its function will be maintained by collagen whitening in the later stage.
The steel wire used is mainly PPDO steel wire, which is mainly used for tightening, pulling, shaping and correcting, and also has the function of improving the deep and shallow fascia layers of dermis. The effect of mechanical fixation is only temporary, because it can not peel off SMAS layer and restore levator muscle.