Vol 20, No 3 (2016)

The second part of the article focuses on alloys based on gold: analysis of the compositions of major elements, the coefficients of thermal linear expansion (thermal linear expansion factor), the color indices of the alloys for cermet dentures.

Introduction: Ozone has a profound antibacterial effect on cariogenic microorganisms and able to increase the efficacy of non-invasive caries as well as the ozone-air mixture activates alkaline phosphatase that intensifies the process of mineralization. Objective: Assessment of clinical efficacy of ozone therapy in treatment of caries at the white spot stage. Materials and methods: The randomized controlled trial recruited 86 athletes aged 17 to 21 years. Patients with a diagnosis of caries at the white spot stage were divided into 2 groups of 43. In control group 1 the complex of professional oral hygiene was conducted involving treatment of demineralization focus with ozone and remineralization with 15% suspension of hydroxylapatite Ca, whereas patients of the other group did not receive ozone therapy. Results were evaluated immediately after the procedures conducted as well as 1, 2, 6 and 12 months later on. Results: In groups 1 and 2 the total percentage of positive results after 12 months counted 93,02% and 65,1% respectively. Intensity of staining in group 1reduced from 2,50±0,23 to 0,33±0,12, in group 2 - from 2,25±0,27 to 1,01±0,21. In group 1 stabilization process was indicated in 2 cases, white spots decreased in size in 8 cases and totally disappeared in 30 cases; compared to 9, 11 and 8 cases in group 2 respectively. Process development and its progression were revealed in 3 cases in group 1 and in 15 cases in group 2. Conclusion: The results of this randomized controlled trial revealed that treatment with the ozone-air mixture leads to significant increase of remineralizing therapy efficacy in treatment of caries at the white spot stage and reduces the risk of carious lesion development and its progression almost in 1,5 times.

Rheumatoid arthritis is a disease characterized by chronic progressive course with involvement of various joints, including the temporomandibular (TMJ). Therefore, dentists should pay attention to changes in the oral cavity, especially in the early stages of the disease rheumatoid arthritis. Tactics of treatment of this category ofpatients has its own characteristics. All dental activities are conducted in close cooperation with the doctor-rheumatologist. Preparation for prosthetics should be carried out under mandatory supervision of occlusal splints and aims to create the optimal balance in the mouth and elements of the TMJ.

The efficacy and safety of the regular use of electric toothbrushes with the oscillating-rotating technology Oral-B PC 500 and Oral-B PC 5000 is studied. Questionnaires of 7022 dentists in Russia and Ukraine as a result of personal experience of using the toothbrush Oral-B PC 5000 conducted. The dynamics of the dental status of the 21 088 patients after regular use them within 12 weeks of the electric toothbrush Oral-B PC 500 evaluated. It was found that the use of electric toothbrushes with the oscillating-rotating technology for individual oral hygiene provided a significant improvement in the status of dental patients: improvement of the general state of oral hygiene was observed in 93,5±0,17% surveyed, reducing plaque fixed from 92,5±0,18% of patients, improving gingival condition was observed in 87,1±0,23% of participants of the Program. 99,8±0,05% of dentists stated that recommend their patients to use electric toothbrush Oral B for better oral hygiene at home.

A comparison ofdental status ofworkers with radiation-dangerous production factors in relation to working in normal working conditions of an industrial plant. It was found a slight excess of the rate ofperiodontal disease, oral mucosa and non-carious lesions of teeth in working in radiation-hazardous working conditions.

Effects NO and reactive nitrogen species for screen method ofprecancer diseases of oral mucous membrane were presented, value of risk transformation in cancer in situ, drafting ofprognosis disease and expediency forfurther researches were showed in this point line.