A representative and randomized study of the effect of a combination of nanosilver and a new injection form of Rexod® on the periodontal tissues state of animals (rats) in an experimental model of inflammatory pathology of periodontal tissues (experimental periodontitis) was carried out. It was shown that the improvement of the dental status of periodontal tissues against the background of the course application of a combination of nanosilver (topically) and a new injection form of Rexod® was accompanied by a decrease in the amount of gingival fluid of the sulcular gingival sulcus, an improvement in the clinical condition of the marginal periodontal mucosa (hyperemia was leveled, swelling decreased, the bleeding indexPBI Muhllemann-Cowell decreased, test Schiller-Pisarev results normalised). The decrease in the number of gum fluids is due to the decrease in antibacterial activity of pathogenic microflora and their products of their life-based hemodynamics of the peripheral microvascular network (exchange capabulars) of the periodontal, a decrease in perfusion pressure in them, reduced (narrowing) of their lumen, reduce their permeability and restoration of oxidation-reduction processes.

It is shown that in experiments on narcotic male rats of the Wistar line using laser Doppler flometry (LDF) under conditions of induced (ligature) experimental periodontitis (EP), indicators of blood microcirculation in the gum mucosa in the lower incisors is reduced compared with intact periodontium. When using traditional drug therapy (TDT) in the conditions of EP in the selected localization, observed a significant promotion in blood microcirculation after a 12-day period of treatment. However, on the 74th day of the study, it decreases. The use of TDT in combination with gel, containing cluster silver in the form of micelle monomers and cluster monomers of the AgK+ type and superoxide dismutase, and a new injectable form, which is a recombinant human superoxide dismutase, under EP conditions in the selected field of study both after applying the pharmacological composition for twelve days, and on the 74th day of the experiment caused an increase in microcirculation to the original values.

Introduction: A promising compound for the treatment of inflammatory periodontal diseases is benzofuracaine (BFC). BFC has pronounced anti-inflammatory, analgesic, reparative, hypoglycemic and other effects. Objective: To assess the influence of benzofuracaine on experimental periodontitis and to study its antidiabetic activity and molecular mechanisms of action Materials and methods: The work was performed on 232 white nonlinear rats of both sexes and 55 male mice. To assess the effect of BFС on experimental periodontitis, the amount of gingival fluid (AGF) was determined, an in-depth morphofunctional study of periodontal tissues was conducted, as well as the study of the biochemical composition of the gingiva and blood. Antidiabetic properties were studied using the glucose tolerance test (GTT), as well as the assessment of endothelium-dependent vasodilation and transmembrane K+-currents on an isolated aortic segment of rats with streptozotocin-induced diabetes mellitus (DM). Results and discussion: In experimental periodontitis, BFC improves the morphological picture and decreases AGF, increases the level of blood microcirculation in the attached gingiva, has a normalizing effect on the prekallikrein-kallikrein system, reduces the synthesis of bradykinin, proinflammatory cytokines and PGE2, increases the level of VEGF, reduces the level of endothelin-1, increases the ATP content and NADH-ubiquinone-reductase activity, exhibits antioxidant properties, reduces the content of nitrosothiols and NO metabolites (NO2/NO3), increases the level of transferrin; when conducting a glucose tolerance test in mice, it reduces the level of glucose in the blood, but in this respect is inferior to glibenclamide, has a hypoglycemic effect in the early stages of diabetes (30 days), tends to restore endothelium-dependent dilatation of smooth muscle cells (SMC) of the aorta and does not affect the functioning of the K+-channels of the aortic SMC. Conclusion: BFС is an effective drug for the treatment of periodontitis and can be recommended for further preclinical and clinical studies.

Background. The development of periodontitis is strongly linked with both periodontopathogenic microflora and antioxidant-proxidant system disorders, which determines the need for the combined use of antimicrobial and antioxidant agents.Objectives. A comparative evaluation of the antioxidant-prooxidant system of red blood cells in rats with experimental periodontitis against the background of the traditional drug therapy and its combination with Soderm®-Forte and new injectable form of Rexod®.Methods. The authors conducted a comparative study of the effect of traditional drug therapy (TDT) and its combination with Soderm®-Forte gel containing silver nanoparticles, recombinant human superoxide dismutase (Rexod®) and new injectable form (NIF) of Rexod® on the condition of the antioxidant-prooxidant system of red blood cells in rats with experimental periodontitis (EP). The experiments were performed on Wistar male rats of 210–230 g. EP was induced by ligature method. The rats were randomly divided into 5 comparable groups of 12 animals: group 1 — with intact periodontium; group 2 — with EP; group 3 — with EP, where TDT was used, including oral irrigation with chlorhexedine (0.05% solution) and application of Septo-Pack dento-gingival dressing; group 4 — with EP, TDT and Soderm®-Forte gel (applied into the periodontal pockets of the lower incisors); group 5 — with EP, TDT in combination with Soderm®-Forte gel and NIF of Rexod®, which was injected intraperitoneally at a dose of 8000 U/kg. Treatment of rats with EP (groups 3–5) was carried out for 12 days. The observation period for all animals lasted 42 days. The biochemical tests and the antioxidant-prooxidant index were used to assess the condition of antioxidant-prooxidant system. Statistical analysis of the obtained results was carried out with parametric and non-parametric methods of Microsoft Excel (Microsoft, USA), Analysis package and AtteStat, as well as Statistica 8.0 (StatSoft, USA) software.Results. The application of TDT against the developed EP caused a moderate positive correction of the indicators of Antioxidant protection system (APS). The enrichment of TDT for the EP animals with Soderm®-Forte and especially Soderm®-Forte in combination with NIF of Rexod® to enhance the APS potential caused more significant positive dynamics of the balance in the antioxidant-prooxidant system compared to TDT.Conclusion. The combination of TDT with Soderm®-Forte and NIF of Rexod® has the most significant positive corrective effect on the condition of antioxidant-prooxidant system of red blood cells in rats with EP in comparison with the complex of TDT with Soderm®-Forte and TDT used separately.