Variations of composition and resistance of hard tooth tissues in chronic kidney diseases
Abstraсt. Results of a morphological structure of an enamel and dentine of the teeth removed on various medical indications at aboriginals of St. Petersburg, aged from 18 till 74 years as the healthy and suffering from chronic illness kidneys are presented. It is revealed that the surface of an enamel was smooth and uniform, and on its sections in the longitudinal and transversal direction well expressed, multiple and very densely packed enamel columns formed by apatite crystals were defined. In a dentine well expressed, numerous functioning dentinal canaliculus with a diameter up to 2 microns both near a pulparny chamber, and in the field of enamel and dentinal border was observed. Such morphological picture is generally characteristic for healthy surveyed young and middle age. In microscopical pictures of a dentine of painful teeth of advanced age the partial and full obliteration of a dentinal canaliculus was defined. In pictures of an enamel of teeth at the patients suffering from chronic illness of kidneys a series of defects is observed: chips, cracks, and also facings of a stertost of various size and localization. These changes of firm tissues of teeth were mainly bound to development of pathological processes in an enamel and a dentine of teeth in the form of not carious lesions (erosion of an enamel, clinoid defects, the increased erasability of firm tissues of teeth). At development of carious process the augmentation of volume of the center of a lesion of tissues occurred due to destruction of larger sites of an enamel in the presence of a dentine destruction. It is shown that carious and not carious lesions of firm tissues of teeth at the patients suffering from chronic illness of kidneys have significant characteristic morphological implications which need to be considered when carrying out treatment-and-prophylactic stomatologic actions, especially in connection with depression at such patients of an adaptic resource of an organism.