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At least 379 records · Page 21Linked to original sources
PubMed1991

Basic studies on visible light-curing resin for denture base. Part 8. The hardening depth of denture relining material after penetration of light through the denture base resin.

A study was performed to examine how the duration of irradiation at the time of relining with visible light-curing material influences the depth of hardening of the relining material, in relation to the thickness of the denture base placed between the denture and the relining material. It was found that for a range of denture base thickness of 1-2.5 mm, a desirable degree of hardening could be obtained using an irradiation time of 20 s for relining material with a thickness of up to 4 mm used for the basal surface.

Dental Materials↗
PubMed1999

[The state of specific functions in female workers subjected to exposure to epoxy resins and to epoxy resin-based polymeric materials during work activities (the data from a medical examination)].

Our in-plant hygienic observations permitted ascertaining that female workers engaged in the manufacture of epoxy-based polymeric materials are exposed to a complex of adverse factors. Gynecological and extragenital pathologies are most prevalent as are disorders in specific functions of the female organism. It is considered necessary that a complex of practical, sanitary and hygienic, and treatment and prophylactic measures be implemented in order that disturbances in specific functions of the female organism might be prevented, values for the prevalence of gynecological and extragenital pathologies decreased. Hormonal colpocytoscopy is warranted in early diagnosis of the menstrual disorders.

Adult↗
PubMed2007

Surface antibacterial properties of resin and resin-modified dental cements.

OBJECTIVE: Cements possessing antibacterial properties may reduce bacteria-induced fixed partial denture complications. The purpose of this study was to evaluate the antibacterial properties of 4 dental cements using the direct contact test (DCT) and the agar diffusion test (ADT). METHOD AND MATERIALS: The ADT was performed using mitis salivarius agar plates. Each plate was evenly inoculated with freshly grown mutans streptococci. Two samples of each test material-RelyX ARC, Variolink II, GC FujiCEM, and Principle-were placed, and the inhibition halo obtained was measured after 48 hours. For the DCT, 8 samples were placed on the sidewalls of wells in a 96-well microtiter plate. After polymerization, freshly grown Streptococcus mutans cells (1 X 10(6)) were placed on the surface of each sample for 1 hour at 37 degrees C. Fresh medium was then added to each well, and bacterial growth was followed for 16 hours in a temperature-controlled spectrophotometer. Similarly prepared samples were aged in phosphate-buffered saline for 1 or 7 days and the DCT was repeated. Analysis of variance (ANOVA) and Tukey multiple comparisons were applied to the data. RESULTS: In the ADT, GC FujiCEM showed an inhibition zone of 2.0 +/- 0.3 mm, and Principle showed an inhibition zone of 1.2 +/- 0.2 mm. In the DCT, freshly polymerized samples of GC FujiCEM and Principle exhibited potent antibacterial properties, while samples of Variolink II and RelyX ARC showed moderate antibacterial properties. Principle showed some antibacterial properties even after 1 day (P < .001). CONCLUSION: None of the tested cements in this study possesses long-term antibacterial properties.

Analysis of Variance↗