Aesthetic rehabilitation for anterior teeth of dental fluorosis with direct composite veneers.

Intrinsic discoloration can be formed due to many reasons, and by clinical evaluation and history from the patient, the exact cause of the discoloration can be known and one of the reasons that can make the intrinsic discoloration is the high level of fluoride intake. Two siblings had come to the Department of Restorative Dentistry clinics; they had the same compliance which is severe dental fluorosis, caries, and malocclusion of their teeth. What is interesting and worrying is that some patients with severe dental fluorosis show higher levels of caries, which can be explained as the enamel becoming porous with severe fluorosis.

Effects of polishing procedures on optical parameters and surface roughness of composite resins with different viscosities.

The aims of this study were to evaluate the optical properties of flowable and injectable composites after polishing, such as translucency (translucency parameter [TP], TP), opalescence (OP-BW), chroma (C*ab), refractive index (RI), and change in surface roughness (Ra, Rz). Ninety disc-shaped samples were prepared from micro-hybrid, flowable, and injectable composites and divided into 3 groups according to the polishing systems (n=10). The RI was measured with an Abbe refractometer, and optical measurements were performed with a spectrophotometer.

NiMoV and NiO-based catalysts for efficient solar-driven water splitting using thermally integrated photovoltaics in a scalable approach.

In this work, a trimetallic NiMoV catalyst is developed for the hydrogen evolution reaction and characterized with respect to structure, valence, and elemental distribution. The overpotential to drive a 10 mA cm current density is lowered from 94 to 78 mV versus reversible hydrogen electrode by introducing V into NiMo. A scalable stand-alone system for solar-driven water splitting was examined for a laboratory-scale device with 1.

Planar Perovskite Solar Cells with High Open-Circuit Voltage Containing a Supramolecular Iron Complex as Hole Transport Material Dopant.

In perovskite solar cells (PSCs), the most commonly used hole transport material (HTM) is spiro-OMeTAD, which is typically doped by metalorganic complexes, for example, based on Co, to improve charge transport properties and thereby enhance the photovoltaic performance of the device. In this study, we report a new hemicage-structured iron complex, 1,3,5-tris(5'-methyl-2,2'-bipyridin-5-yl)ethylbenzene Fe(III)-tris(bis(trifluoromethylsulfonyl)imide), as a p-type dopant for spiro-OMeTAD. The formal redox potential of this compound was measured as 1.

[The seroprevalence of Toxoplasma gondii among prisoners in the Kayseri closed prison].

Toxoplasmosis is a zoonosis caused by Toxoplasma gondii and can be found in humans, domestic animals and wild animals almost everywhere around the world. The aim of this study was to investigate the seroprevalence of toxoplasmosis among the 628 prisoners in the Kayseri Closed Prison. Anti-Toxoplasma gondii IgG and IgM antibodies were investigated in the serum specimens with the IFA method.