Silica gel has good elasticity, strong plasticity, non-toxic, harmless, non-carcinogenic and good compatibility with its own tissues, so it is very safe to use silica gel material to lengthen the nasal columella. It is the most popular material at present. The main advantage of using silica gel to prolong nasal columella is that it will not cause rejection reaction, and the postoperative effect is obvious and natural. The disadvantage is that there may be inflammation, but this phenomenon will disappear after a while.