Functional anatomy of periodontium, oral cavity and stomatognathic apparatus. Biological aspects of the periodontium and the oral cavity. Definition of the classification. Overview of periodontal disease Epidemiology: diagnostic periodontal indexes and treatment needs, prevalence (age, social status, etc.), risk factors for periodontal disease, periodontal disease as a risk factor for other diseases. Analysis of local etiological factors ( dental plaque and tartar): formation, structure and localization of the mucobacterial plaque, mineralization, composition and structure of tartar, conditions favoring the accumulation of local etiological factors. Periodontal disease microbiology: periodontal infections and their peculiarities, determination of pathogenic species in the various forms of periodontal disease, acute manifestations, gingivitis, periodontitis. Pathogenesis: host defense processes, nonspecific immune response (PMN, macrophages, inflammation), specific immune response (humoral and cellular lymphocyte), histopathology of the lesion, initial, early, stabilized, advanced lesion. Host susceptibility: individual response, risk factors. Periodontal disease clinic: gingivitis, gingival volume increases, clinical manifestations of periodontitis (pockets, gingival recessions, injuries of furcations, mobility, migrations, abscesses), early and aggressive onset periodontitis, chronic periodontitis, necrotizing periodontitis, periodontitis during systemic diseases. Relationship between periodontal disease and systemic disease. Basic and advanced periodontal diagnosis: medical history, clinical examination, survey, Rx examination, immunological and biochemical laboratory tests, microbiological tests, genetic tests. Periodontal therapy: principles and purposes. Preliminary treatment plan. Aetiological periodontal therapy: Antiseptics in periodontal therapy, Chemical control of supragingival plaque, Evaluation of agents and chemical products, Clinical use of chlorhexidine, Objectives of etiological therapy. Etiological therapy toolkit Patient information and oral hygiene techniques. Scaling Root planing. Laser-assisted approach to periodontal therapy. Elimination of factors favoring plaque accumulation. Elimination and control of systemic diseases and risk factors. Chemical control of subgingival plaque. Antibiotics in periodontal therapy. Revaluation after etiologic therapy and definitive treatment plan. Overview of periodontal surgery: Principles of periodontal surgery. Healing of the periodontal wound. Periodontal surgical instruments. Suture materials and methods. Guidelines for periodontal surgery. Objectives of surgical treatment. Indications and contraindications of periodontal surgery. Anesthesia. Postoperative monitoring. Surgical therapy: the access flap. Resective Surgical Therapy. Mucogingival Surgical Therapy: Classification of recessions, indications for the increase of adherent gingiva and for the root covering, surgical techniques of adherent gingiva augmentation, surgical techniques of root covering. Regenerative surgical therapy: biological principles of regeneration, membranes and growth factors, guided tissue regeneration (GTR), induced tissue regeneration (ITR).  Support periodontal therapy: Maintenance of medium and long term results, Motivation and periodic motivation reinforcement, Patient compliance. Etiology, pathogenesis, clinical manifestations and treatment of peri-implant diseases (mucositis and peri- implantitis). Maintenance and prognosis in the medium and long term of osseointegrated implants. Role of the laser in implantology.