Periodontology is a branch of dentistry that deals with the tissues surrounding the teeth, inflammatory diseases and their treatment. If the bacterial plaques accumulated on the teeth and between them are not cleaned properly, they turn into calcified calcification after a while. This makes cleaning even more difficult. The bacterial plaque that spreads deeper over time causes an inflammatory reaction manifested by redness, swelling and bleeding in the gums. The disease at this level is called gingivitis. If the disease continues to progress, first the gums and then the bone tissue surrounding the tooth root melts and pulls out, losing the tooth support and falling off by shaking. The disease at this level is called periodontitis.