After gingivectomy, there is a blood clot covering the trauma, and a large number of neutrophilic polymorphonuclear granulocytes migrate out to cover the trauma within a few hours, and the oral epithelial cells on the root side of the trauma begin to crawl from the edge of the trauma to the surface of the tooth in 9-13 hours, and the dividing activity of the epithelium reaches a peak in 1-2 days, and the epithelium grows at the rate of 0.5 mm per day to the surface of the tooth in 2-5 days, and the thin layer of epithelium covers the trauma completely in about 5-14 days, but it takes about 4 weeks to keratinize and repair the epithelium completely. Keratinization and complete repair takes about 4 weeks. The new connective tissue beneath the blood clot begins to be generated 24 hours after surgery, mainly granulation tissue containing new capillaries, and the proliferation reaches a peak on the 3rd to 4th day and grows toward the crown, forming a new free gingiva on about 5 to 7 days, after which the epithelium begins to grow toward the gingival sulcus, and a new binding epithelium is formed about 4 to 5 weeks after surgery, which is firmly bonded to the surface of the tooth in the form of semi-bridging granules and basal plates. The gingival appearance is clinically normal and a normal gingival sulcus is established at about 2 weeks after gingivectomy, but complete histologic healing takes 6 to 7 weeks, and the amount of gingival sulcus fluid increases within a week of surgery and returns to normal at about 5 weeks. If the original binding epithelium is completely removed at the time of surgery, there is a slight loss of attachment level and slight resorption of the top of the alveolar ridge after healing. Although the healing process after gingivectomy is the same, the length of healing time is influenced by the size of the surgical wound, local irritants and infection.