Due to the volume of the wire itself, which has a physical filling effect, it will have a filling effect on the tear troughs immediately after burial. On the other hand, with the passage of time, the wire will also stimulate the collagen growth of the surrounding tissues (this process takes about 1 month), this part of the collagen can also play the role of filling, so there will be a better filling effect about 1 month after the buried wire. The threads begin to degrade and absorb 8 months after they are embedded in the body, and are completely absorbed at 15 months. The collagen or elastic fibers produced by the stimulation of the threads are still present and continue to play a role in the filler effect, theoretically for up to 2 years.