Methods: Bovine tooth roots were sectioned, mounted in epoxy, and progressively ground and polished to expose the dentin layer. Caries-like lesions were pre-formed in the dentin samples by immersion for 96 hours in demineralization solution (pH = 4.52) at 37°C. Randomly-selected samples were pulled after lesion formation and did not go through the remin/demin cycle. The remaining samples were s...

BACKGROUND Caries process is not a static one, but is dynamic with interspersed periods of demineralization and remineralization of enamel, intimately related and occurs episodically based upon the presence of cariogenic bacteria in dental plaque and the availability of refined carbohydrates for fermentation to organic acids. OBJECTIVES Early enamel caries could be reversed with avoidance of ...

AIM The aim of this study was to evaluate the surface/mineral changes on enamel before and after the application of acidulated phosphate fluoride (APF) gel, fluoride enhanced hydroxyapatite gel and propolis in conjunction with carbon-dioxide (CO2) laser. MATERIALS AND METHODS Crowns of 40 human maxillary central incisors were collected and were divided into four groups of 10 each: Topical flu...

The title compound, C(14)H(17)FO(2), was obtained from anti-4a,9a:8a,10a-diep-oxy-1,4,4a,5,8,8a,9,9a,10,10a-deca-hydro-anthra-cene via tandem hydrogen-fluoride-mediated epoxide ring-opening and transannular oxacyclization. With the two cyclo-hexene rings folded towards the oxygen bridge, the title tetra-cyclic fluoro-alcohol mol-ecule displays a conformation remin-iscent of a pagoda. The crysta...

The S.C. Aurul S.A. is a joint venture company owned by the Esmeralda from Australia and the "Remin" National Company of Precious and Non-ferrous Metals in Romania, established in 1992. The design concept was to transport the mining waste away from the city, while the gold and silver in the tailings could be recovered, using efficient and modern technology that was not available at the time the...

japan, known as a pro-choice country in terms of abortion, is currently facing the increase of “selective abortions” thanks to new prenatal screening. efforts to restrict proliferation of new technology has not been successful and it is likely that japan will turn pro-life by strictly enforcing the maternity protection act (mpa), which prohibits abortions due to “fetal cause”.

introduction: to compare the effects of 0.05% sodium fluoride (naf) mouthrinse, gc tooth mousse and gc mi paste plus on white spot formation inhibition. materials and methods: thirty pairs of extracted human premolars were cut in half mesio-distally with a disc. the teeth were coated with nail varnish, except a part of the buccal and/or lingual enamel, which was used as the test area, and then ...