After the wisdom tooth is removed, a hole is left where the wisdom tooth used to grow, which is also known as a socket. After the wisdom tooth is removed, a blood clot is formed in the fossa, which has a very important role to play in the immediate post-extraction period. It helps the wound to heal and prevents infection, so it is important to protect the clot as prescribed by the doctor after the tooth has been extracted. As time progresses, the clot will gradually absorb and grow new tissue to fill the cavity where the tooth was extracted. The whole process takes about two months for the gums to fill in and recover.