[Study of the kinetics of accumulation and distribution of the photosensitizer photoditazin in the oral mucosa in patients with lichen planus]

THE AIM OF THE STUDY

Was to explore the accumulation and distribution of the photosensitizer Photoditazine in the oral mucosa when applied to pathological lesions in patients with severe forms of lichen planus.

MATERIAL AND METHODS

A clinical and laboratory examination was carried out in 50 patients with severe forms of lichen planus (bullous and erosive-ulcerative) aged 18 to 70 years, including 6 men and 44 women. For autofluorescent imaging a LED device with a wavelength in the violet region of the spectrum (400±10 nm) was used. Quantitative registration of the kinetics of accumulation and distribution of the photosensitizer was carried out using the method of local fluorescence spectroscopy by measuring the fluorescence spectra.

RESULTS

The measurements were made before applying the photosensitizer, 10, 20 and 30 minutes after application. The study showed that in most patients with erosive-ulcerative and bullous forms of lichen planus, the accumulation of the photosensitizer in the lesions on the oral mucosa increased as the exposure time increased from 20 to 30 minutes. The fastest accumulation of the photosensitizer occurred in the areas of mucosal lesions with the most pronounced vascularization, namely, in the area of the tongue and the bottom of the oral cavity.

CONCLUSION

Using the method of local fluorescence spectroscopy, the kinetics of accumulation and destruction of photosensitizer in pathological areas of the oral mucosa was determined, and therefore the optimal time of laser exposure to the lesion was determined.

[The use of photodynamic therapy in patients with severe forms of leukoplakia]

OBJECTIVE

The aim the study is to increase the effectiveness of the treatment of severe forms of leukoplakia with the use of photodynamic therapy.

MATERIAL AND METHODS

120 patients with severe forms of leukoplakia were examined. 30 patients were diagnosed with Cr and carcinoma in situ, and therefore they were excluded from the study. In 90 patients, the diagnosis was confirmed by histological and IHC studies. Before the use of photodynamic therapy, the degree of saturation of pathological foci with a photosensitizer was determined by the method of fluorescent diagnostics using the LED device «RFS-400».

RESULTS

As a result of treatment with photodynamic therapy using a 2nd generation photosensitizer («Photoditazine» 0.5% gel penetrator), a significant improvement in the epithelization of lesion elements was observed: in 92% of patients with verrucous leukoplakia and in 83% of patients with erosive leukoplakia.

CONCLUSION

The use of photodynamic therapy for the treatment of patients with complicated forms of leukoplakia is an effective method of treatment for this pathology.

[The study of microbiota in patients with bullous lesions of the oral mucosa]

THE AIM OF THE STUDY

The study by the method of tissue polymerase chain reaction of the species composition of the microbiota of lesions of the oral mucosa in patients with bullous lesions.

MATERIAL AND METHODS

Biopsy specimens of the oral mucosa of 51 patients were studied by the polymerase chain reaction method, of which 14 patients with pemphigus vulgaris, 17 patients with pemphigoid bullosa, and 20 patients with the bullous form of ruber lichen planus. 4 types of microorganisms have been identified - Fusobacterium, Streptococcus pneumoniae, Candida albicans, Ureaplasma spp. and viruses - Human Papillomavirus 16, Epstein-Barr virus and Citomegalovirus.

RESULTS

In the study of the microbiota of bullous lesions, associations of microorganisms and viruses were established in a significant number of cases. Associations of Str.pneumoniae and C. albicans were quite common in patients with pemphigus vulgaris in 26.3%, pemphigoid bullosa in 20.0%, and in patients with the bullous form of ruber lichen planus in 14.3% of cases. In patients with pemphigus vulgaris, the association of Str.pneumoniae, C. albicans and EBV was noted in 31.6% of cases. In patients with the bullous form of ruber lichen planus in a high percentage of cases (28.6%), the associations of Str. pneumoniae, EBV and CMV.

CONCLUSION

Identification at earlier stages of management of patients with bullous lesions Str. pneumoniae, Candida albicans, and Fusobacterium associated with herpes viruses should be regarded as one of the triggering mechanisms of an autoimmune conflict, which subsequently causes a specific clinical picture of these diseases.

[Monitoring the implementation of the compulsory health insurance program for the prevention of dental diseases]

The purpose of the study is to monitor the implementation of the CHI program for the prevention of dental diseases. Based on the analysis of the monitoring results, the need for adjustment and direction of improvement of the observed process was identified. During the period from 2013 to 2018, there was a slight increase in the volume of preventive care per 1 insured citizen, from 0.186 visits to 0.211, which does not meet the recommended indicator and is insufficient. In the dynamics of expenses per 1 insured citizen, there is a trend of significant growth of 1.93 times. The cost of 1 visit with a preventive purpose in the dynamics also increased by 1.71 times, amounting to 603.16 rubles in 2018. it is Necessary to specify in detail the methodology for conducting a preventive examination, its interpretation and the list of services provided during this period.

[Optimization of the diagnosis of precancerous diseases of the oral mucosa and lips (Manganotti's abrasive precancerous cheilitis and erythroplakia)]

OBJECTIVE

To optimize the identification of precancerous diseases of the oral mucosa, such as Manganotti's abrasive precancerous cheilitis and erythroplakia of the oral mucosa using markers Ki-67 and keratin 15.

MATERIAL AND METHODS

The study group included 17 patients with Manganotti's abrasive precancerous cheilitis and 8 with erythroplakia of the oral mucosa. A histological analysis was carried out to scrutinize the biopsy material of the oral mucosa of the patients. Ki-67 protein and keratin 15 were used to assess the proliferative activity of epithelial cells and the severity of neoplasia. Results. Thirteen patients with Manganotti's cheilitis had dysplasia of varying degrees, and 4 had signs of malignancy. A high proliferative activity of the Ki-67 protein was found in the stratum basal and stratum spinosum of the epithelium. In 5 patients with erythroplakia, according to histological examination, grade 2-3 intraepithelial neoplasia was revealed and 3 patients had cancer in situ. The expression of keratin 15 in all patients with Manganotti's abrasive precancerous cheilitis and erythroplakia in the basal layer tended to decrease with an increase in the degree of dysplasia, however, the appearance of keratin 15 in the cytoplasm of cells located above the basal layer was discovered.

CONCLUSION

The use of Ki-67 protein and keratin 15 as immunohistochemical markers in the study of diseases such as Manganotti's abrasive precancerous cheilitis and erythroplakia of the oral mucosa makes it possible to identify the initial signs of malignancy more accurately in the epithelium.

[Criteria for quality assessment and labor payment for dental care professionals]

Internal regulatory documents of the medical organization reflecting the calculation of incentive payments and a personalized assessment of the quality of dental care were analyzed. It is found that until now the new system of wage payment has not solved the problem of stimulating dental care professionals depending on the results of their work and needs to be changed. The applied criteria of quality assessment and the intensity of labor must have measurable parameters that exclude subjective appraisal; the integrative coefficient of labor quality must be created. A transparent mechanism of wage payment is also needed in order to motivate staff highly to achieve the qualitative and quantitative indicators of labor that are incorporated in it by the medical organization authority and are related with their work goals. Every criterion outlined in the 'Regulation on Inner Control of the Quality and Safety of Dental Care' should reflect the intensity and quality of dental services and correspond with the criteria of the incentive premiums calculation, that have been prescribed in the 'Wage payment regulations'.

[The analysis of the structure, types and volumes of dental care provided to adults with tongue disorders by obligatory medical insurance program]

This article presents the data about the structure, the types and volumes of dental care provided to adults with tongue disorders by obligatory medical insurance program. The study showed that treatment of tongue disorders in conditions of the municipal dental polyclinic is practically not carried out. There are 7 types of services provided to patients with these disorders, and only 3 of them could be attributed to treatment manipulations.