The width of the attached gingiva is defined as a distance between the depth of the gingival sulcus or gingival/periodontal pocket to the mucogingival junction. Authors suggest that a minimal amount of attached gingiva is necessary to ensure the gingival health. When the buccal bone plate and gingival tissues are thin and the position of the tooth is too vestibular gingival margin often displaces apically, and gingival recession develops. In the presence of gingival recession and reduced vestibular depth oral hygiene procedures are embarrassed. The definition of class III gingival recession is marginal lack of tissue extended to/or beyond the mucogingival junction with bone and soft tissue loss interdentally or malpositioning of the tooth. Prognosis for class III and IV gingival recession is that only partial coverage can be expected after root coverage procedures - FGG (free gingival graft) or connective tissue graft (CTG). Adjunctive surgical techniques would be helpful to achieve better aesthetic outcomes.

Periodontitis is an infectious disease concerning supporting tissues of the teeth. The primary etiological agent for disease development and progression is the subgingival biofilm, but recently it is known that host factors may modify the pathological process or may affect the severity and /or extent. The increasing levels of some specific pathogenic subgingival bacteria such as Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia, Fusobacterium nucleatum, Prevotella intermedia and others can result in periodontal destruction and possibly correlate with disease severity. Data from controlled studies show high prevalence of P. gingivalis, T. forsythia and Tr. denticola which represent the red complex (coexistence of these three species) in patients with moderate and severe chronic periodontitis. Parallel investigation of probing depth (PD) and clinical attachment level (CAL) with the microbiological testing may give a confirmation of relation between subgingival pathogenic bacteria and severity of periodontitis.

Introduction: In recent years, especially after Bulgaria accession to the EU on 1st January 2007, new scientific horizons have appeared in front of the academic community in our country. Medical universities work in a really competitive environment both on a national and global scale, where the high quality of lecturing, research and medical activities is a key factor for success. Aim: The purpose of this study is by analyzing data from our questionnaire to define the most distinctively expressed lecturers’ opinions regarding the research project activities performed by Bulgarian faculties of Dental Medicine. Material and methods: The questionnaire including 13 questions was completed by 75 lecturers from Faculties of Dental Medicine in Sofia, Varna and Plovdiv. The questionnaire was anonymous so that maximum objectivity and reliability of the collected information can be achieved. The questionnaires were filled in between January and May 2013. Results: In order for us to achieve the goal of this study we focused on the questions from the questionnaire. Conclusion:Lecturers from all three faculties of dental medicine are partially aware of the procedures and various types of project financing. They express their willingness to participate in research project activities although their implementation is rather difficult. Lecturers estimate the advantages and disadvantages of participation in projects and in their opinion the unit in charge of project activities at the relevant Faculty of Dental Medicine should comprise of various experts who are to ensure up-to-date information on current or future projects.