An Interdisciplinary Study Regarding the Characteristics of Dental Resins Used for Temporary Bridges.

Background and Objectives: The surface condition of the materials that are used for temporary prostheses influences their microbial colonization, with a direct impact on the oral tissues. This study aims at a comparative analysis of three types of resins for temporary bridges using conventional and digital technologies. The attention was focused on the analysis of the surface characteristics and mechanical strength of these materials. Materials and Methods: The surface condition was assessed for three distinct materials both before and after polishing- heat-curing resin Superpont C + B (SpofaDental, Jicin, Czech Republic) used unconventional technology, Zotion dental milling polymethyl methacrylate (PMMA) block (Zotion, Chongqing, China) for provisional crowns/bridges used in digital subtractive technologies and Freeprint Temp (Detax GmbH & Co. KG, Ettlingen, Germany) resin for temporary crowns and bridges that are used in 3D printing technologies. The two-way ANOVA analysis indicated that polishing leads to a statistically significant increase in roughness coefficients for all the three resins that were tested (p < 0.001). While the highest roughness coefficients were displayed in the 3D cured sample, the largest decrease was reported by the milled sample Results: The results revealed that surface roughness was significantly influenced by both the type of resin that was used (p < 0.001) and the treatment that was induced by finishing and polishing (p < 0.001). Similar p-values were obtained for each of the three resins. Conclusions: The results demonstrated a significant optimization of the surfaces after finishing and polishing and statistically significant differences between the surface parameters and the mechanical properties of the samples. The low values of the roughness and the acceptable values of the mechanical resistance for the conventional samples indicate these materials for the long-term temporary bridge's realization, allowing the correct restoration of the functions and the rehabilitation at the oral level.

[Experimental study regarding the involvement of vitamins in the development of the dentomaxilar system]. / Studiu experimental privind implicarea vitaminelor in dezvoltarea sistemului dentomaxilar.

The severe deficiencies of maternal nutrition in vitamins, both before and during pregnancy, might induce severe alterations of developing teeth in embryos and very young rats. Thus, the morphologic analysis of embryonic preparations revealed blood vessels slightly widen out, without turgescence, increased cellular density with oedema of the conjunctive tissue, foamy aspect of cells from mesenchyma. The adult preparations presented decreased cellular density with important fibrosis and presence of foamy cells, lack of dentine formation with small and diffuse proteinic accumulations, rarefied blood vessels, lack of enamel formation.

[Assessment of food intake in rural area school children]. / Aprecierea alimentatiei elevilor din mediul rural.

Children food intake is influenced by family nutritional habits and economic status. According to the results of our survey, only 54.8% of the children have taken their breakfast, although all of them recognize the importance of this meal. 9.6% of the children are not using fresh fruits and vegetables in their diets, even if these are the main sources of vitamin C. Regarding the milk consumption, most of the children use this food item once (35.5%) or twice (19.4%) a day and only 16.1% occasionally. Although most of the children (93.5%) know that excessive salt intake represents a risk factor for their health, 87.1% have preferences for salted and spiced foods. Under the influence of advertising, certain changes in the nutritional habits have been noticed; instead of traditional snacks, children are more attracted to fast-food type snacks.

[Cognitive level and behaviour in nutritional health education in a group of parents]. / Nivelul cognitiv si comportamental privind educatia pentru sanatate nutritionala la un lot de parinti.

In the last years, the education for health developed itself rapidly, due to the close relationship between scientific development and social life dynamics. The relation between the cognitive level, behaviour and nutrition was assessed in a group of parents with children 9 to 12 years of age. The majority of the parents, and also of children, have an adequate cognitive level, knowing very well the basic principles of a sanogenic diet. Many parents give as their information source the mass-media, and especially the television, the education for nutritional health must be reconsidered, in order to have a greater impact in preserving the health status of the individual.