After a patient has a tooth extraction, the mucosal wound on the surface of the extraction wound can generally heal in 5-7 days, while the healing of the bone tissue of the extraction wound will generally be basically completed in about six months after the extraction, including the formation of granulation tissue, resorption and reconstruction of the alveolar bone, immature bone tissue, and normal bone tissue, as follows:1. Formation of granulation tissue: During the healing period, the extraction wound will undergo blood clotting, roughly 24 hours after the extraction. 24 hours, the blood clot began to occur blood clot mechanization, and gradually formed granulation tissue. 2, alveolar bone resorption and reconstruction: about 20 days after the extraction of the tooth, the granulation tissue will be replaced by more mature fibrous connective tissue, while the resorption of the alveolar bone, reconstruction occurs. 3, immature bone tissue: about three months after the extraction of the tooth, the alveolar socket all the formation of bone tissue, but at this time belongs to the immature bone tissue, bone density is low. 4, normal bone tissue: the immature bone tissue, bone density, bone density is low. 4, normal bone tissue: about six months after the extraction, the bone reconstruction is basically completed, showing normal bone tissue, and only at this time belongs to the complete healing of the extraction wound.