Microorganisms naturally inhabit the oral cavity, which in a balanced biorhythm does not cause tissue disorders. However, by neglecting oral hygiene, unhealthy lifestyle along with systemic diseases, opportunistic bacteria consequently disrupt tissue homeostasis. The classification provides a systematic overview of periodontal tissue diseases, where the most pronounced is periodontitis, which is separately divided into stages and classes. Therefore, guidelines have been scientifically developed to help the therapist create an individualized treatment plan. The course of therapy is a long-term process that requires commitment and dedication to adhere to therapeutic measures and advise the patient so that success is satisfactory. The patient's awareness is directed towards oral hygiene maintenance techniques, control of risk factors and the importance of physical activity and change in the lifestyle. The specific goal is to establish healthy foundations for further rehabilitation of the stomatognathic system, respectively to achieve a quality outcome of the therapy, after which comes the prosthetic supply of the oral cavity, where the chewing function and, of course, aesthetics are completely rehabilitated.