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Pathological resorption is diagnosed quite often in the treatment of periodontitis and is considered a prognostic adverse symptom. Increasing the effectiveness of the therapeutic treatment of destructive periodontitis is associated with the development of methods of instrumental and drug effects on root canals and depends on the correct selection of endo-sealant to achieve the predicted result. The combined pathology of root resorption is no exception in the case of a correctly chosen treatment strategy. The article reports on the successful therapeutic treatment of a tooth with destructive periodontitis and combined root resorption. Radiographically proven that there is a complete recovery of periapical tissues. Long-term results indicate the effectiveness of the treatment.

Aim. To study morphology of external resorption of apical root area of teeth with destructive forms of apical periodontitis in the acute stage.Materials and methods. Microrelief of 10 previously untreated teeth with destructive forms of apical periodontitis in the acute stage was investigated. The material was taken at the moment of dental manipulation of tooth extraction after injecting anesthesia with 2% lidocaine solution or Septanest if indicated with the information consent of the patient.Results. Damaged cement of heterogeneous structure with areas of resorption alternating with areas of undamaged cement in the area of the root tips was found. The resorbed cement looks like large lacunae with clearly outlined ribs, filled with rounded cell clusters – cementocytes.Conclusions. Resorbed tooth root cement of heterogeneous structure with different area and degree of destruction depth was found in the places of periodontal absence. In some cases the resorption of the root cement partially affected the inner area of the apical orifice.

Aim. Optimization of root canal filling.Materials and methods. The determination of apical hermeticity was performed on extracted single root teeth and obturation was performed using three techniques: cold lateral compaction, hot vertical compaction and hybrid technique.Results. The optimal obturation technique is the hybrid technique, which has a stable and minimal gap between the obturation material and the root canal wall.Conclusions. Obturation techniques such as lateral compaction and vertical compaction are the quality standard, but the most optimal technique is the hybrid technique, which has taken only the positive qualities of both previously presented techniques.

Aim. To assess systematically the available scientific evidence about clinical response of using polyhexanide as an antiseptic agent in medicine and dentistry. The properties of polyhexanide – excellent antimicrobial activity, chemical stability and low toxicity – have been studied.

Aim. Article is to detail the positive and negative aspects associated with the creation of a glide path with various types of endodontic instruments.Materials and methods. During a systematic review of the literature, Russian – and English-language publications were studied in the electronic databases PubMed, Google Scholar. Articles, the content of which concerns the methods of creating a glide path, as well as possible complications were included in analysis.Results. 60 articles were reviewed during the review. After analyzing the literature according to the inclusion and exclusion criteria, the total number of publications has become 32.Conclusions. According to the studied literature, it can be said that the glide path provides a predictable behavior of rotary tools and it is a recommended condition for achieving the success of endodontic treatment at the stage of canal mechanical treatment and preventing iatrogenic complications.

Aim. To analyze current data on the bactericidal efficacy of endodontic irrigants, in particular, sodium hypochlorite and chlorhexidine in different concentrations relative to the elimination of resistant microorganisms (E. Faecalis, C. Albicans). Irrigation is an important stage in the treatment of root canals, it prevents the further contamination of the canals with microorganisms. However, irrigants do not always cope with this function, which leads to the occurrence of a secondary infection.Materials and methods. The study of publications was produced in the electronic databases such as Google Scholar, PubMed and ScienceDirect in the course of a systematic review of the literature. Included articles contain information about various types of irrigants and their antimicrobial effect.Results. 73 articles were viewed during the review. After analyzing the literature for inclusion criteria, the total number of publications has become 41.Conclusions. According to literature data, irrigation solutions in widely used by clinicians concentrations (sodium hypochlorite 3%, chlorhexidine 2%) are not able to completely eliminate E. faecalis and C. albicans from the root canal system.

Resorption of the alveolar bone after tooth extraction is an irreversible process due to biological bone remodeling. It will greatly complicate the further treatment of patients for dental implantation, since for the latter a prerequisite is a sufficient volume of bone tissue. It leads to a protracted treatment process: the volume and timing of interventions increases. The literature review has shown possible methods of preservation of the alveolar ridge after tooth extraction and the results of their application.

Aim of the study was to evaluate the clinical efficacy of a nanomatrix with Miramistin based on M-Chip (Double White, Russia), which is used subgingivally as an addition to SRP (scaling and root planing) as a combination therapy in patients with chronic generalized periodontitis.Materials and methods. T he s tudy i ncluded 4 5 p atients w ith c hronic g eneralized p eriodontitis (20 f emales a nd 25 males; age span is 35–60 years; mean age 57.87 ± 8.2 years). Patients with a probing depth ≥5 mm were included. Selected patients did not receive antibiotic therapy during the last 6 months of follow-up.Results. The mean clinical parameter values between the M-Chip + SRP treatment group and the SRP control group showed a statistically significant improvement in clinical parameters at 6 months compared to baseline values for the following indicators: plaque index (API), gingival pocket depth at probing, Mühlemann Bleeding Index (BI), the level of clinical attachment.Conclusions. SRP has been shown to be effective in reducing pocket depth, increasing periodontal attachment, and reducing inflammation. However, when SRP was used with the M-Chip, possible additional clinical benefits have been shown.

Aim . To consider the problem of polymerization stress. Polymerization stress Is one of the main causes of loss of marginal Ш and subsequent postoperative manifestations, such as hypersensitivity, marginal staining, secondary carles, deformation of underlying tooth tissues. Materials and methods . A systematic review of the literature In the electronic databases Google Scholar and Pubmed was conducted. Articles related to the problem of polymerization stresses formation In dental composite materials, as well as factors that directly affect this process, are considered and Included. Resuits . 68 articles were analyzed during the review. After making the selection based on the exclusion criteria, the numberofincluded studies was 31. Conciusion . According to the studied publications, the development of shrinkage stresses Is In^uenced by four main groups of factors, the manifestations of which can be minimized as a result of modifying the structure of the composite material and methods of working with It.