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Liquid epoxide resins, solvents and solvent-modified epoxide resins, as well as hardeners for epoxide resins, appear to be skin and mucosa irritants of different intensity and possibly have allergenic properties. Therefore, it is required that the employees are qualified and industrial safety rules are followed when these substances are in use in the manufacturing process. Our study evaluated the state of dentition and analysed the loss of teeth in the workers of the laminate and composite materials department of aircraft factory. The research has been carried out in a group of 114 workers, which consisted of 88 men and 26 women 20 to 61 years old. The control group consisted of 41 workers of the administration department in the aircraft factory who did not have any contact with chemical compounds. The workers in the studied group are characterised as having an unsatisfactory state of dentition, as shown by the high rate of lost teeth (74%). Statistically significant difference between the studied group and the control was found when the relationship between the number of lost molar teeth in women in the studied group and those in the control group is taken into consideration, a statistically significant difference appears to refer to teeth 46 and 27. The same statistically important correlation between men in the control and studied groups concerns teeth 16. The research data shows that incisor teeth are the least frequently extracted teeth in the whole population studied. Statistically significant differences can be noted for teeth 21 and 23 between the women in the control group and those in the studied one. Future studies are necessary to assess the potential relationship between the loss of teeth among workers of the department of laminate and composite materials of aircraft factory and their workplace.
The state of dentition of pregnant women influences both the woman's health and the baby's health, even in its prenatal life. The aim of our study was to evaluate environmental factors influencing the state of dentition of pregnant women. The studies were conducted among 101 pregnant women from the Lublin region. Essentially, more decayed teeth were found in women smoking before pregnancy. Significantly more filled teeth were found in women not smoking before pregnancy. The number of missing teeth and the mean number of decayed, missing, and filled teeth increased with women's age. No correlation was stated between the state of dentition and a women's education and living environment. During pregnancy, 43.56% women did not report for a dental check-up.
Eighteen Wistar rats were exposed for 24 d to an electromagnetic field and water. The tongue, mucous membrane of the cheek wall, and the parotid gland were examined histopathologically. The examination showed slight differences in the histological structure of the tongue muscles and mucous membrane of the cheek wall between the experimental and control groups. In the tissues of the tongue from experimental animals, extensive extravasations in the tunica muscularis were observed. In sections of the parotid gland of these animals, slight lymphoid cell infiltrations, and masses of various consistency and colour, from yellow to brown, were noted in the lumen of the parotid ducts.
W pracy oceniono poziom magnezu w ślinie osób chorych na stwardnienie rozsiane. Badanie biochemiczne wykonano również w grupie kontrolnej. Na podstawie przeprowadzonych badań stwierdzono obniżony poziom magnezu w ślinie osób chorych w porównaniu z osobami zdrowymi. Wyniki badań mogą sugerować pewien związek ze stwardnieniem rozsianym.
Introduction. Glass-ionomers have the ability to chemically bond to enamel and dentin, and are characterized by longterm fluoride release and absorption of fluoride from surrounding sources. Objective. The aim of the presented long-term clinical trial was to evaluate and compare the three-year clinical performance of the experimental glass-ionomer cement ‘SJZ/W’ with the bi-functional fluid placed in carious and non-carious cavities. Material and methods. Seventy restorations were made in adult patients of both genders. Clinical evaluation was performed at baseline and yearly intervals after placement using Ryge’s scale, considering the surface structure, anatomical form of the restoration and marginal integrity. Results. Immediately after placement, 70 restorations were assessed, 65 of which were subject to clinical evaluation after a year, 63 subject to clinical evaluation after 2 years, and 3-year evaluation was made for 55 restorations. The material showed minor changes in evaluated parameters and no differences were detected between their performance at baseline, and after three years only in anatomical shape. No post-operative sensitivity was recorded. Conclusion. The examined glass-ionomer ‘SJZ/W’ provided an acceptable clinical performance over a three-year period.
The effects of different doses of Ukrain and/or strontium on the rat tooth intertubular dentine were analysed in cuts perpendicular to the dentinal tubes. The tooth surface and tooth cross-sections morphology and roughness were investigated with atomic force microscopy. The surface morphology and roughness of the dentine from seven groups of animals was examined with tapping-mode atomic force microscopy. The cross section surface of intertubular dentine was analysed by roughness and fractal parameters. Histograms were prepared for the typical samples from all the analysed groups of teeth. Dentine cross section surfaces showed significant and distinguishable differences between nano structures of the normal control rat teeth and those from animals administered with Ukrain and strontium.
The effects of different doses of Ukrain and/or strontium on the rat teeth intertubular dentine were analysed in cuts perpendicular to the dentinal tubes. To the dentine elemental analysis, scanning electron microscopy (SEM) equipped in XRF (X-ray fluorescence) microprobe was used. Strontium concentration increased from 4.1% in the control group to 5.0% and 6.3% for the groups administered with strontium and strontium together with Ukrain. At the same time, a lowering of calcium concentration was observed. The rat dentine elemental composition was markedly altered after the administration of Ukrain and strontium. It was shown that strontium with Ukrain decreased the demineralisation of the dentine.
The aim of the study was to evaluate interrelationships between final body weight, and morphometric, densitometric, and mechanical properties of the mandible in 6-month-old Polish Large White pigs exposed to dexamethasone and nanocalcium. The study was performed on 27 males, castrated on the 28th d after weaning, and reared until the age of 6 months, after which the animals were slaughtered, and the mandible was obtained. The pigs were divided into four experimental groups: animals given per os nanopartical calcium, animals injected with dexamethasone, animals given both nanopartical calcium per os and dexamethasone injections, and animals injected with placebo. After the slaughter, morphological properties of the mandible such as bone weight and length were determined. Using computed tomography technique, volumetric bone mineral density (vBMD) of the cortical bone (Cd), mean volumetric bone mineral density (MvBMD), and total bone volume (Bvol) of whole mandible were measured. Areal bone mineral density (BMD) and bone mineral content were evaluated with the use of dual-energy X-ray absorptiometric method. Using three-point bending test, mechanical parameters such as maximum elastic strength (Wy) and ultimate strength (Wf) of mandible were estimated. Pearson's correlation coefficient (r) was determined between all the investigated variables. The obtained results showed a significantly positive correlation between body weight and mandible weight, mandible length, Bvol, Cd, BMD, BMC, Wy, and Wf. However, statistically insignificant correlations of MvBMD and body weight, mandible weight, mandible length, and Bvol were observed. Furthermore, Bvol and Cd were not found to be significantly correlated. In conclusion, this study showed numerous positive correlations between final body weight and densitometric, morphometric, and mechanical properties of the mandible. This bone of pigs may be used as an attractive model for further investigation on metabolic response of the skeleton to physiological, nutritional, toxicological, and pharmacological factors influencing bone tissue metabolism.
The modifying influence of Lydium KLP upon the early postirradiation reaction in rats was studied. The effects of Lydium KLP upon the intensity of irradiation reaction was monitored in morphological examinations of the trachea and lung tissue and concentrations of chosen blood plasma proinflammatory cytokines. The experiment was carried out on four groups of Wistar rats: (1) not irradiated (control), (2) administered with Lydium KLP, (3) irradiated and (4) irradiated with Lydium KLP administration. After three months the animals were sacrificed and histopathological examinations of the trachea and lung sections were performed. The concentrations of TNFa, IL-6 chemotactic factor MIP-2 were determined with commercial kits. It was found that postirradiation reduced the damage of the trachea and lung tissue in the group of rats irradiated with simultaneous administration of Lydium KLP. However, the concentrations of proinflammatory cytokines in the group of rats irradiated with simultaneous administration of Lydium KLP were higher in comparison to the group irradiated, not treated with Lydium KLP.
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