ABSTRACT
The aim of the study was to evaluate ultrastructural changes of dental enamel after fixation of orthodontic appliances, initial influence of orthodontic forces and removal of braces. Five intact permanent tooth extracted for orthodontic reasons were included in the experimental study. Scanning probe microscopy was conducted in 4 random enamel points in each tooth (20 points overall) in semi-contact mode with standard 10 nm probes. The study showed ultrastructural enamel changes such as nanofractures up to 1 mm along the braces locks. The changes correlated with surface morphological features and teeth anatomy and may play an important role in dental decay and non-carious lesions occurring in the course of orthodontic treatment.
Subject(s)
Dental Enamel/ultrastructure , Orthodontic Appliances, Removable/adverse effects , Orthodontic Brackets/adverse effects , Adolescent , Adult , Dental Caries/etiology , Hardness , Humans , Microscopy, Scanning Probe , Models, Biological , Young AdultABSTRACT
The paper presents modified method of teeth slice preparation for evaluating enamel and dentin morphological structure by means of atomic force microscopy (AFM). The method allows measuring directly and describing hydroxyappatite crystals on nanolevel. Structural properties of dental hard tissues were determined and comparative characteristic of form and density of enamel prisms particles with similar morphological inorganic elements of dentin were specified.
Subject(s)
Dental Enamel/ultrastructure , Dentin/ultrastructure , Microscopy, Atomic Force , Tooth Preparation/methods , Hardness , HumansABSTRACT
The data given below show the efficiency of the therapy of the patients suffering from iron-deficiency anemia with gastroenterological pathology and helicobacter infection. The indicators of red blood of the patients from the group where they had been treated with medicine containing iron and antihelicobacterial therapy had a tendency to be higher with a prolonged compensation of anemia in comparison with the group of the patients who had not had antibacterial therapy. Finger kirliandiagnostics was offered as an express-method to identify a possible infection. The feature of a high probability of infection is intoxication in gastroduodenal zone, abdomen area and a colon.