Gum recession cannot be repaired by itself, because gum recession is generally divided into physiological recession and pathological recession. Physiological recession is mostly seen in the elderly, where degenerative gum recession occurs with age, which is a physiological phenomenon and cannot be repaired by itself. Pathological gingival recession is generally caused by gingival food impaction, bad restorations and long-term calculus accumulation, which can be relieved by removing the stimulating factors, such as removing bad restorations and replacing them with well-designed restorations; full-mouth scaling, which is commonly known as scaling, can remove the stimulation of calculus, and gingival recession can be relieved; if gingival recession is caused by an increase in the gap between teeth due to dental food impaction, periodontal revision can also be performed If the gum recession is caused by an increase in the gap between the teeth due to food ingrowth, the gum mucosa can be improved and the gum recession can be repaired to achieve an aesthetic effect.