Periodontitis is divided into early and late stages. Early periodontitis can be cured, while late periodontitis is difficult to treat and may require tooth extraction if severe. Periodontitis is an inflammatory, destructive resorption that occurs in the periodontal supporting tissues. There are usually significant amounts of dental calculus and plaque around the teeth. The initial treatment involves removing these through teeth cleaning. After cleaning, applying medication through rinsing around the gums can be helpful, and in many cases, this can lead to a cure. Generally, early periodontitis does not involve noticeable absorption of the alveolar bone. However, in advanced stages, the formation of periodontal pockets and absorption of the alveolar or jaw bone represent severe manifestations of periodontitis. If it is difficult to maintain or restore oral health through basic treatment in such cases, tooth extraction may be necessary.