Distribución de alteraciones oseo dentales en pacientes con diferentes grados de apiñamiento dental

Introducción. El apiñamiento dental es una maloclusión muy frecuente que determina fuertemente las condiciones del tratamiento ortodóncico; sin embargo, la distribución de las alteraciones presentes en los distintos grados de apiñamiento no es del todo claro. Objetivo: Conocer la distribución de alteraciones oseo-dentales en los destinos grados de apiñamiento dental. Materiales y métodos: A través de un estudio transversal descriptivo se determinaron las diversas alteraciones presentes en sujetos con los distintos grados de apiñamiento con análisis ortodóncicos convencionales. Resultados: El apiñamiento moderado y el severo fueron los tipos mas frecuentes, principalmente en mujeres. La distribución de las alteraciones fue generalmente parecida entre los grupos de apiñamiento; sin embargo, la forma triangular aumento gradualmente con el grado de apiñamiento. Conclusiones: Es posible que el tipo de apiñamiento no sea un indicador para la aparición de alteraciones oseo dentales específicas; sin embargo la severidad del apiñamiento podría predisponer maxilares superiores triangulares

Hydrothermal Synthesis of Bi 2 MoO 6 Visible-Light-Driven Photocatalyst

Bismuth molybdate (Bi 2 MoO 6 ) nanoplates were synthesized by the hydrothermal reaction of bismuth nitrate and sodium molybdate as starting materials at 120-180 ∘ C for 5-20 h. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and scanning electron microscopy (SEM) were used to investigate the effect of reaction temperature and length of reaction time on phase and morphologies of the as-synthesized Bi 2 MoO 6 samples. In this research, orthorhombic wellcrystallized Bi 2 MoO 6 nanoplates with the presence of stretching and bending vibrations of MoO 6 and BiO 6 octahedrons were detected, and the Bi 2 MoO 6 nanoplates synthesized at 180 ∘ C for 5 h exhibit the highest photocatalytic efficiency over 96% within 100 min visible-light irradiation

Hydrothermal Synthesis of Bi2MoO6 Visible-Light-Driven Photocatalyst

Bismuth molybdate (Bi2MoO6) nanoplates were synthesized by the hydrothermal reaction of bismuth nitrate and sodium molybdate as starting materials at 120–180°C for 5–20 h. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and scanning electron microscopy (SEM) were used to investigate the effect of reaction temperature and length of reaction time on phase and morphologies of the as-synthesized Bi2MoO6 samples. In this research, orthorhombic well-crystallized Bi2MoO6 nanoplates with the presence of stretching and bending vibrations of MoO6 and BiO6 octahedrons were detected, and the Bi2MoO6 nanoplates synthesized at 180°C for 5 h exhibit the highest photocatalytic efficiency over 96% within 100 min visible-light irradiation

Hydrothermal Synthesis, Characterization, and Optical Properties of Ce Doped Bi2MoO6 Nanoplates

Undoped and Ce doped Bi2MoO6 samples were synthesized by hydrothermal reaction at 180°C for 20 h. Phase, morphology, atomic vibration, and optical properties were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectrophotometry, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and UV-visible spectroscopy. In this research, the products were orthorhombic Bi2MoO6 nanoplates with the growth direction along the [0b0], including the asymmetric and symmetric stretching and bending modes of Bi–O and Mo–O. Undoped and Ce doped Bi2MoO6 samples show a strong absorption in the UV region

Hydrothermal Synthesis, Characterization, and Visible Light-Driven Photocatalytic Properties of Bi2WO6 Nanoplates

In this research, the effects on reaction temperature and length of time on Bi2WO6 nanoplates by hydrothermal synthesis on morphologies and photocatalytic properties were studied. The products obtained at different reaction temperature and reaction time were characterized by XRD, Raman, FTIR, SEM, and TEM techniques. The photocatalytic properties of the samples were measured by decomposing the rhodamine-B organic dye. XRD pattern was specified as pure orthorhombic well-crystallized Bi2WO6 phase for the 180°C and 20 h synthesis. Its FTIR spectrum shows main absorption bands at 400–1000 cm−1, assigned to Bi–O stretching, W–O stretching, and W–O–W bridging stretching modes. SEM and TEM analyses show that the product was composed of nanoplates. Photocatalytic activity of Bi2WO6 nanoplates shows the 98.24% degradation of rhodamine-B under the Xe light irradiation within 100 min