FEATURES OF OCCLUSAL CORRELATIONS OF MOLARS IN THE DENTAL CLINIC.

OBJECTIVE: The aim: To study the odontoglific and odometometric parameters of molar crowns of the upper and lower jaws in males and females. PATIENTS AND METHODS: Materials and methods: To achieve the aim of the research was used odontoglyphic, odometometric and statistical methods of research. RESULTS: Results: We have found that male molars of the upper jaw are characterized by approximately the same ratio between the vestibular-palatal and mesial-distal diameters of the crown, so the teeth are square-formed. For female large angular teeth of the upper jaw the predominance of vestibular-palatal over mesial-distal diameters of the crown is characteristic, which results in an oval form of the teeth. On having analyzed the forms of the third lower molars, it can be affirmed that for this group of teeth various variational forms of crowns, from three- to five-tuber forms, are characteristic. Vestibular-lingual and mesio-distal sizes also vary according to the type of odontoglific pattern of occlusal crown surface. CONCLUSION: Conclusions: We consider it expedient to take into account the abovementioned characteristics of the masticatory surface of molars of the upper and lower jaws of male and female persons for the creation of qualitative orthopedic structures that would fully restore the masticatory function.

The intensity of chronic catarrhal gingivitis in children depending on the age.

OBJECTIVE: The aim: To determine the degree of severity of the inflammatory process in periodontal tissues of children living in different ecological conditions. PATIENTS AND METHODS: Materials and methods: With the purpose of estimation of the condition of periodontal tissues the epidemiology examination of 642 children that live on territory with the high level of pollution and natural deficit of iodine and fluorine was conducted. RESULTS: Results: The study found that the increase of age of examined children causes the decrease of percentage of easy degree of severity of chronic catarrhal gingivitis, giving way to the advanced forms of the disease, and this process was more pronounced in children living in ecologically polluted region. In children-inhabitants of ecologically clean region easy degree of severity of chronic catarrhal gingivitis met more often than their peers living in environmentally polluted region. At the same time, average and heavy degree of severity of chronic catarrhal gingivitis in children living in ecologically contaminated region met more often than their peers, inhabitants of ecologically clean region. CONCLUSION: Conclusions. It was found that with increasing age of the examined children decreases the percentage of chronic catarrhal gingivitis of moderate severity.

Features of the course of enamel biomineralization processes in various anatomical areas of the tooth.

OBJECTIVE: The aim: To establish the features of the structural organization of enamel in various anatomical areas of the tooth and determine their influence on the characteristics of the course of biomineralization processes. PATIENTS AND METHODS: Materials and methods: The study of the structural features of enamel and dentin was performed on thin sections of various groups of teeth. Then morphological, histochemical and electron microscopic examination methods were used. RESULTS: Results: The study found that there are three structural and functional barriers to biomineralization of enamel, which are located in different anatomical areas of the tooth crown. Each of them has both general and specific features. Enamel biomineralization is a continuous process of exchange of calcium ions, donor of which is brushite. The stepwise process of biomineralization turns the latter into calcium octaphosphate, which then turns into hydroxyapatite. The latter, when destroyed by carbon dioxide, forms carboxyapatite. CONCLUSION: Conclusions: In the result of conducted study was established peculiarities of enamel mineralization processes in different anatomical parts of tooth.