[The study of a diagnostic model of mucogingival deformities using high-frequency ultrasound dopplerography]. / Primenenie vysokochastotnoi ul'trazvukovoi dopplerografii u patsientov s mukogingival'nymi deformatsiyami.

OBJECTIVE: The aim of the study is to increase the effectiveness of diagnostics of microhemocirculatory changes in periodontal tissues in anatomical and functional disorders of the mucogingival complex, based on the use of the method of discriminant analysis of ultrasound opplerography. MATERIAL AND METHODS: 187 patients aged 18-44 years (young age according to WHO) were examined without concomitant somatic pathology with various variants of anatomical structures of the mucous-gingival complex, which included an assessment of blood flow in periodontal tissues by ultrasound dopplerography at rest and during a functional test of the tension of the soft tissues of the upper and lower lip, cheeks using an opt-out. After qualitative and quantitative analysis of dopplerograms, an automated assessment of the microhemocirculation of the studied structures was performed, identifying differences between groups using step-by-step discriminant analysis with the study of several variables. RESULTS: Depending on the type of reaction to the sample, a model of the distribution of patients into separate groups based on the application of the discriminant analysis method is proposed. It was found that patients of all groups were classified statistically significantly (p<0.05) and the possibility of distributing patients according to the described criteria (the ratio of the maximum systolic blood flow rate along the mean velocity curve, Vas) to a specific class corresponding to the highest value of the function was proved. CONCLUSION: The proposed method for assessing the functional state of periodontal tissue vessels allows classifying patients with high accuracy and a minimum of the probability of false results, reliably assess the degree of existing functional disorders, determine the prognosis and further tactics of therapeutic and preventive measures and can be recommended for use in clinical practice.

[The need and possibility for disinfecting impressions in orthodontics (a review of the literature)]. / Neobkhodimost' i vozmozhnost' dezinfektsii ottiskov v ortopedicheskoi stomatologii (obzor literatury).

Reviews the data on a high risk of viral and bacterial infection of dentists in connection with the high prevalence of AIDS and viral hepatitis B and on the possibility of infection of dental patients and the staff by microorganisms transfer on the impressions. Presents the present-day methods and means for disinfection of the impression material. Emphasizes inadequate knowledge of the dentists about the virucidal efficacy and the possibility of the impressions changing their properties in disinfection, which fact results in inaccuracy of the ready articles.

[The relationship of the mechanical properties of the dentoalveolar complex to the status of the bone tissue in traumatic occlusion]. / Zavisimost' mekhanicheskikh svoistv dentoal'veoliarnogo kompleksa ot sostoianiia kostnoi tkani pri travmaticheskoi okkliuzii.

The authors have developed a model of traumatic occlusion, simulating a swinging functioning overload of the periodontium in dogs; this model is adequate to the clinical conditions of occlusion disorders of dentitions. Experiments with 18 dogs have demonstrated a relationship between change in the biomechanical and physical properties of dentoalveolar tissues and the length of traumatic occlusion. Experiments have shown a progressive reduction of the ability of dental abutment tissues to resist the load and slowed down reparative processes in the periodontal tissues in swinging type traumatic occlusion.