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The paper describes a method of root canal retreatment that enables by means of CT data, laser surface scanning of teeth and a number of software to create plastic templates making possible successful retreatment with minimal risk of complications. The effectiveness of the method was evaluated in vitro on 10 extracted teeth. Application of the method in clinical practice enables the highest degree of accuracy and security of the procedure.

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Nowadays an individual selection of personal care depending on the dental and hygiene human status is of great importance. The present study examines the clinical efficacy of toothbrushes with different characteristics of the brush field. The cleaning efficiency of toothbrushes with horizontal slant bristle and smooth cutting of the brush field is 75%, toothbrushes with a horizontal slant bristle and multilevel cutting of the brush field - 79%, toothbrushes with power bulge - 70% and toothbrushes with a flat brush field - 56%.

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Options vary about the microbial contamination of toothbrushes as well as selection of adequate remedies for their disinfection. A microbiological study of contamination of toothbrushes was conducted considering the efficiency of purifying tablets, ultraviolet radiation and 0.05% solution of chlorhexidine as means of toothbrushes disinfection.

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Comparison of methods comprehension was done with intraoral roentgenography, orthopantomography (OPG), cone-beam computer tomography (CBCT) on the devices with optical amplifier of roentgenologic image (OARI) and sensor resolution (SR) 2 pair of lines per mm and without OARI with SR 2.5 pair of lines per mm. There were used extracted earlier teeth with adequate root canal obturation. According to the results of the study the image received with the help of CBCT with high SR let have the biggest information volume about filling quality of root canal and root canal structure peculiarities that testified to pro of the method over CBCT with OARI. The most widespread in the practice methods of intraoral roentgenography and orthopantomography not in all cases reflected reliably the root canal obturation degree.

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The examination of hard tissues, periodontal and hygiene indices was conducted in 56 patients to determine the efficacy of toothpastes with natural compounds. According to the results, the natural compounds did not alter the color of the hard tissues, but also improved the hygienic status and lessened the periodontal inflammation manifestation in the oral cavity.

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Based on the 4-year experience with the method of air-abrasion treatment on the stages of treatment and prevention of dental caries in the article provides data on the indications for its use, benefits and complications.

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Endodontic treatment quality of different teeth groups was analysed according to computer tomography data. 1000 dental root canals of 521 teeth of 115 patients of different age groups were studied. The study results testified to low level of endodontic treatment quality. In 71.7% of cases instrumental processing and obturation of dental root canals were fulfilled inadequately. The most often mistake of endodontic treatment was insufficient root canals instrumental processing (62.8%).

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Results of the study testified to the fact that on intraoral X-Ray pictures and orthopantomograms the structure of root canals of all teeth groups were not reflected objectively. The errors of methodical techniques led to considerable loss of their diagnostic comprehension. Conus computer tomography (CCTG) in comparison with spiral computer tomography was more informative and significant method for topographic study of root canals of different teeth groups determinant lower doses of patient's irradiation. Today the most reliable technique for the structure of roots of all teeth groups and root canals spatial location was CCTG in axial projection supplemented by reformative oblique projections. Combination of CCTG before the treatment with intraoral X-Ray pictures after its finishing let objectively assess the quality of the conducted endodontic treatment.

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Microcolorimetric method was used for study of toxic and antiproliferous properties of 3 adhesive systems acting by adhesive upon fibroblast cell culture. It was established that I Bond adhesive system was most biocompatible and that it can be used for direct and indirect capping of injured tooth pulp.

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The destruction of human serum albumin was studied under the influence of the preparations used for chemical-mechanic removal of carious dentine (GK-101 and Caricleans, gel #2) and model systems containing sodium hypochlorite and amino compounds. Control contained hydroxide and sodium chloride but not hypochlorite. The degree of albumin destruction was determined by the amount of low molecular weight fragments precipitated by phosphotungstic acid but not by trichloracetic acid. From the results of the study the conclusion was made that in order to reduce the injuring action of hypochlorite upon dental tissues and soft tissues of oral cavity it is more preferable to use systems containing the addition of neutral and basic amino compounds.

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Biological evaluation of the 1st domestically developed and produced preparation for chemomechanical removal of carious dentine Caricleans (firm "VladMiVa", Belgorod) was performed in the CRIS with the use of express techniques of the hemolytic activity (HA) and cytotoxic effect (CTE). It was established that according to HA data both gels of the Caricleans preparation were nontoxic. CTE of 2 gels was also determined on 2 cells lines - LECH (lung embryon cell human) and HeLa; higher sensitivity was received on HeLa cells, the toxic effect of gel #2 of the Caricleans preparation was higher. The received results allowed the authors come to the conclusion that taking into account high sensitivity, high specificity and high cost of the CTE-test not to recommend its use for evaluation of the preparations for short-term action in stomatology.

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A new method for the treatment of apical periodontitis, making use of Optodan laser, differs from the known method by more rapid periapical tissue regeneration, which is paralleled by high antiinflammatory effect of magnetic laser therapy at early stages of treatment.

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