Browsing by Autor "A V Gustavo Paredes"

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Conocimiento del uso de bifosfonatos y su relación con la osteonecrosis de los maxilares en profesionales de la salud del Instituto Autónomo Hospital Universitario de Los Andes (IAHULA) Mérida Venezuela
(2023) A V Gustavo Paredes; Jenair Yépez; D. Ortiz Chinchilla; Inés Hernández
La osteonecrosis o necrosis avascular, es una enfermedad causada por la disminución del flujo sanguíneo en los huesos. Desde hace 15 años aproximadamente se ha notado con preocupación el incremento de osteonecrosis maxilar, y numerosas investigaciones coinciden en que existe una relación de la enfermedad con el consumo de medicamentos como los bifosfonatos. Dicha patología puede presentarse con dolor intratable, problemas de alimentación, sinusitis, abscesos, fístulas extra-orales, entre otras secuelas perjudicando la calidad de vida de los pacientes. Aunado a esto, se debe considerar que de no ser diagnosticada a tiempo progresa la severidad de la condición, requiriendo terapias especializadas, que pueden ser costosas. A pesar de las numerosas investigaciones, se siguen reportando casos de osteonecrosis de los maxilares inducida por bifosfonatos. El propósito de esta investigación es diagnosticar en médicos y odontólogos del IAHULA los conocimientos sobre la osteonecrosis de los maxilares inducida por bifosfonatos. Se realizó un abordaje documental y una investigación de campo de tipo transeccional, contemporánea, multivariable de rasgos, en la cual se elaboró y aplicó una encuesta con preguntas mixtas dirigidas a médicos especialistas y odontólogos del IAHULA. Los resultados arrojan respuestas positivas acerca del conocimiento que el personal médico maneja sobre la osteonecrosis inducida por bifosfonatos, sin embargo, son pocas las interconsultas que se dan con el área odontológica y así prevenir la aparición de la enfermedad.
La filosofía de la historia y la evolución del conocimiento en Auguste Comte
(2011) A V Gustavo Paredes; Claret Castellanos
The following article discusses Auguste Comte’s ideas about the philosophy of history on the law of States three, analyzing the distinctive traits of each stage, especially the kind of knowledge that accompanies. Similarly, different criteria established by Comte to sort and rank the sciences, to what he considered the social physics or who subsequently defi ned as sociology are presented
Método de deshidratación para el análisis del plasma rico en fibrina mediante Microscopía Elctrónica De Barrido (MEB)
(2015) A V Gustavo Paredes; Oriana Ortega; Gladys Josefina Velazco Viloria; Anajulia González Betancourt; N Eduvigis Solórzano
The plasma rich in fibrin (PRF) is a modification with respect to the traditional prepared of PRP, they have regenerative properties of human tissues. Several techniques have been used to observe the ultrastructure of biological compounds, one of them is the scanning electron microscopy (SEM). The objective of the research was to analyze three methods of dewatering the PRF for the ultrastructural study by SEM. The fibrin clot was sectioned in three parts and the samples were subjected to a process of dehydration in the following way: absorbent paper (sample 1), immersion in acetone (sample 2) and immersion in ethanol (sample 3), the plate with the samples was introduced into an Ion Coater for 100 seconds, because makes the surface of the fibrin conductive, after this the samples were introduced in the electronic microscope. The treatment of dewatering to the sample 1 showed a better organization of the fibres without evidence of structural damage compared to the sample 3 whose fibres acquired a flattened shape that might suggest a state of degradation and very different from the treatment to the sample 2 in where it was observed a drastic reduction of the size of the fibres. The results show that there is better structure when the sample is subjected to less aggressive treatment of dewatering and preserved in its entirety the structural integrity and all cell components present.
Principios filosóficos del pensamiento positivista de Auguste Comte
(2011) A V Gustavo Paredes; Claret Castellanos
The following article presents the main ideas of positivism of Auguste Comte. First, presents the infl uences exercised the philosophers of the 17th centuries - 19th on thinking comtiano, highlighting the approaches that served as you foundation to build what he called the science of society or sociology. Second, show concepts, categories and central propositions of positivist theory.
Síntesis electroquímica de Perborato de Sodio para aclaramiento dental
(Universidad Internacional de La Rioja, 2021) A V Gustavo Paredes; Reynaldo Luis Ortíz Ramos; Gladys Josefina Velazco Viloria; Elkis Weinhold
A tooth whitening solution was electrochemically synthesized performed using a galvanostatic electrolysis. A cell of two compartments separated by a Nafion membrane was employed; Platinum mesh was used as working electrode and a stainless steel ring as a counter-electrode, the electrolytic solution was composed by a mixture of sodium carbonate / sodium bicarbonate 130g / L / 25g / L respectively and sodium borate (borax ) 40g / L. The solution was electrolyzed for 6 hours applying a constant current of 60 mA and then titrated with 0.1N KMnO4. The electrolysis allowed obtaining a solution of sodium perborate with a concentration of 9.7% P / V. To check the bleaching efficiency of the solution, 30 extracted teeth pigmented in coffee were used. To verify the innocuousness of the solution on the tooth surface, the samples were observed by optical microscopy. The results were observed through frequency registers and photographs, significant differences in the color of the teeth before and after whitening were observed. It was concluded that the solution obtained was effective for tooth whitening and harmless for the adamantine surface.
Una aproximación a la historia de la guerra fría (1945 - 1991) vista desde la OTAN y el PAV
(2007) A V Gustavo Paredes
El presente articulo expone el periodo conocido como Guerra Fria (1945 – 1991), visto desde la conformacion y confrontacion de las dos grandes alianzas militares de la segunda mitad del siglo XX, a saber, la Organizacion del Tratado del Atlantico Norte (OTAN) y el Pacto de Varsovia (PAV). De esta forma, se muestran de manera cronologica las condiciones politicas, economicas y militares que dieron origen a estas alianzas, asi como los acontecimientos en los cuales se enmarcaron las politicas de contencion y distension, definidas en las doctrinas internacionales que orientaron las administraciones de Washington D. C. y Moscu durante este contexto historico