Elderly population frequently presents more than one prosthetic restoration realized from different types of dental alloys which, in time, suffer various alterations in the oral environment. Metallic ions are released in saliva due to its electrolytic qualities, interacting with the contact tissues. Studies regarding cytotoxicity of dental alloys are providing contradictory results. Besides biocompatibility, the microbial factor is also greatly influencing the long-term success of the prosthetic rehabilitation. This study's aim was to assess the response of the gingival tissue to nickel chromium (Ni-Cr) and copper (Cu)-based dental casting alloys from fixed dentures present in many patients from Romania. Gingival samples were taken from 124 patients wearing fixed dental restorations made from these two types of alloys from injured areas surrounding the abutment teeth; histological specimens were prepared, fixed in 10% neutral buffered formalin, paraffin-embedded and stained with Hematoxylin-Eosin (HE). Histological analysis showed the existence of a chronic inflammatory infiltrate in the gingival chorion, necrosis areas, and vascular congestion. Various morphological alterations appeared, depending on the intensity of the inflammation and the immune response. The surface epithelium suffered a hyperplasic reaction, either limited to acanthosis or involving the whole epithelium, the release of the Cu2+ and Ni2+ ions from the dental alloys used in bridges and crowns being responsible for inducing gingival hyperplasia and a chronic inflammation in the areas situated around the abutment teeth. The immunohistochemical study allowed us to observe an increased number of positive cluster of differentiation 3 (CD3) T-lymphocytes in periodontium, proving that the cellular immune response is rapid and intense.

The most significant contribution to the values of carious experience is the number of teeth affected by caries at the expense of obturated ones.

Background: Dental caries in children has been explored not only as a local oral condition but also in relation to potential systemic inflammatory changes. This study evaluated systemic inflammatory biomarkers and hematologic indices in children with dental caries and examined their association with caries severity, as assessed by the DMFT index. Methods: In this exploratory cross-sectional sibling-controlled study, 114 participants were included: 75 children with dental caries and 39 unaffected siblings serving as controls. All participants underwent blood testing, including inflammatory biomarkers (TNF-α, NGAL) and hematologic indices (NLR, LMR, PLR, IIC, MCVL, SII, SIRI, AISI). Group comparisons were performed using parametric or nonparametric tests, depending on data distribution. Correlation analyses were conducted within the caries group. Age- and sex-adjusted univariate and multivariable linear regression models were used to identify predictors of DMFT, and logistic regression was applied to evaluate associations with high caries burden (DMFT ≥ 6). Results: Children with caries showed higher NGAL, PLR, and MCVL, and lower LMR than controls, while IIC showed a non-significant upward trend. Correlation analysis revealed strong associations among several inflammatory indices, largely reflecting shared computational components. DMFT showed a modest positive correlation with LMR, whereas associations with classical inflammatory biomarkers such as TNF-α and NGAL were weak or absent. In age- and sex-adjusted models, several markers showed borderline associations with DMFT, but none remained independently significant in multivariable analyses. Age was the strongest predictor of DMFT, while sex showed no significant effect. Logistic regression for high DMFT confirmed age as the only significant determinant. Conclusions: In this exploratory pediatric cohort, children with dental caries showed differences in selected systemic inflammatory and hematologic biomarkers compared with unaffected siblings. However, most biomarkers showed only limited independent associations with caries severity after adjustment, with age emerging as the primary determinant of DMFT. These findings suggest that systemic inflammatory markers have limited independent explanatory value for caries severity and should be interpreted as exploratory rather than clinically definitive.

Regarding the influence of obesity on general health of children, scientific literature showed the importance of early management of children's overweight. In terms of oral health, overweight and obese children were shown to have accelerated dental development and increased prevalence of caries. The aim of the present study is to evaluate the influence of Body Mass Index (BMI) and dietary behaviors on the oral status, eruptions and hygiene in children. Ninety-two children aged 6-12 years were investigated about the oral hygiene habits, nutritional related behaviors, presence of systemic diseases. Values of BMI and oral status were noted. Statistical analysis was performed. Significant moderate correlations between the values of BMI with tooth eruption and weak but significantly with dental lesions were determined. The dietary behaviors and BMI could influence the oral status, eruptions and oral hygiene in children.

Several decades after the development of FEM in computer-based form, which is a milestone in the evaluation of mechanical systems, the method has been adopted to analyze the biomechanical response of human skeletal structures. This innovative technique has generated new questions, but also new results, and, at the same time, competitive environments with explosive development, in the recent period. This research is focused on analyzing, using FEM, the extreme thermal variations produced at the level of two oro-facial systems (one control and one subjected to orthodontic therapy using a fixed metallic orthodontic appliance). The objective of the study was to determine the temperature evolution in different dental structures subjected to extreme temperatures given by variations between very cold and very hot foods. Each system was exposed to a succession of extreme thermal regimes (70…−18…70… °C and −18…70…−18… °C). In order to conduct this research, we used the case of a 14-year-old female patient. Following an orthodontic evaluation, we discovered that the patient had dento-alveolar disharmony with crowding. The straight-wire method of applying a fixed metallic orthodontic appliance was chosen. As complementary examinations, the patient was subjected to a bimaxillary CBCT. Using a series of programs (InVesalius, Geomagic, SolidWorks, and AnsysWorkbench), a three-dimensional model was obtained. This model contained jaws and teeth. Also, brackets, tubes, and orthodontic wires can be incorporated into the model. Following the simulations carried out in this study, it was found that thermal variations from the dental pulp are more severe for the oro-facial system with a fixed metallic orthodontic appliance (regardless of the type of thermal stimulus used). Thus, even today, with all the facilities available in the dental materials industry, metallic orthodontic devices present significant thermal conductivity, generating harmful effects on the dental structures. The reading of the results was performed on the virtual model, more precisely, on the internal dental structures (enamel, dentin, and pulp). A statistical study was not performed because it was considered that, in other patients, the results would be similar.