On the basis of parodontosis type A lays the socalled premature aging of parodontis. It is not always clear why it appears. A definite role in the development of parodonthosis plays hereditary predisposition. It is also mentioned that parodontosis type A more often occurs with patients, who have lacked some certain vitamins and microelements for a long period of time, patients with cardiovascular pathologies - arthrosclerosis, hypertension, maybe because of the infringement of blood circulation to the gums tissue.

Parodontosis is a long lasting disease. In its development it goes through several stages. The first stage is gingivitis is gums inflammation. Gums itch, there is absence of freshness, the feeling that gums become friable; all these are characteristic of gingivitis, which is sometimes hardly observed because it looks a little bit oedematic, and can be observed only by the stomatologist. These sensations appear rarely and disappear fast.