Manejo del paciente con cardiopatia isquémica en la consulta odontológica

La cardiopatía isquémica es una enfermedad frecuente en los individuos de edad avanzada, por lo que es necesario conocer su diagnóstico y tratamiento para poder ofrecer así una correcta atención odontológica a los pacientes afectos de dicha patología. Previo al tratamiento de la patología de la cavidad bucal deberemos considerar una serie de precauciones y cuidados, dependiendo del grado de cardiopatía que presenten (angina estable, angina inestable, angina variante o infarto). Otro aspecto importante a considerar es el conocimiento de la prevención y de la conducta correcta a seguir ante un paciente con un ataque anginoso en la consulta dental

Nonrenormalization of Flux Superpotentials in String Theory

Recent progress in understanding modulus stabilization in string theory relies on the existence of a non-renormalization theorem for the 4D compactifications of Type IIB supergravity which preserve N=1 supersymmetry. We provide a simple proof of this non-renormalization theorem for a broad class of Type IIB vacua using the known symmetries of these compactifications, thereby putting them on a similar footing as the better-known non-renormalization theorems of heterotic vacua without fluxes. The explicit dependence of the tree-level flux superpotential on the dilaton field makes the proof more subtle than in the absence of fluxes.Comment: 16 pages, no figures. Final version, to appear in JHEP. Arguments for validity of R-symmetry made more explicit. Minor extra comments and references adde

Incidence of mandibular osteoradionecrosis (MORN) after intensity modulated radiotherapy (IMRT) versus 3D conformal radiotherapy (3D-CRT): A systematic review

Background: Analyze the incidence of MORN after head and neck radiotherapy by two novel irradiation techniques. 3DCRT and IMRT and compare the success rates of distinct authors. Material and Methods: An electronic search in Pubmed (MEDLINE), Ovid. Google Scholar and Cochrane Library (Wiley). databases was conducted with the key words Radiotherapy, Conformal[Mesh] OR Radiotherapy. Intensity-Modulated[Mesh]) AND Osteoradionecrosis[Mesh] for all databases. The inclusion criteria randomized controlled trials (RCT), as well as prospective and retrospective cohort studies published in English; MORN patients treated with 3D-CRT y IMRT. Results: 27 articles were selected from 194 initially found. 14 articles out of 27 were excluded and finally included 8 publications were included in the systematic review that were ranked according to their level of scientific evidence using the SORT criteria. Conclusions: When both RT techniques were compared; IMRT revealed a lower risk incidence of MORN development and enhanced dose constraint than 3D-CRT (less than 10%). this improvement could translate into less complications post RT treatment

Cosmological Rescaling through Warped Space

We discuss a scenario where at least part of the homogeneity on a brane world can be directly related to the hierarchy problem through warped space. We study the dynamics of an anti-D3-brane moving toward the infrared cut-off of a warped background. After a region described by the DBI action, the self-energy of the anti-D3-brane will dominate over the background. Then the world-volume scale of the anti-D3-brane is no longer comoving with the background geometry. After it settles down in the infrared end, the world-volume inhomogeneity will appear, to a Poincare observer, to be stretched by an exponentially large ratio. This ratio is close to that of the hierarchy problem between the gravitational and electroweak scales.Comment: 12 pages, 2 figures; v2, PRD version, comments and references adde

Instanton effects and linear-chiral duality

We discuss duality between the linear and chiral dilaton formulations, in the presence of super-Yang-Mills instanton corrections to the effective action. In contrast to previous work on the subject, our approach appeals directly to explicit instanton calculations and does not rely on the introduction of an auxiliary Veneziano-Yankielowicz superfield. We discuss duality in the case of an axion that has a periodic scalar potential, and find that the bosonic fields of the dual linear multiplet have a modified interpretation. We note that symmetries of the axion potential manifest themselves as symmetries of the equations of motion for the linear multiplet. We also make some brief remarks regarding dilaton stabilization. We point out that corrections recently studied by Dijkgraaf and Vafa can be used to stabilize the axion in the case of a single super-Yang-Mills condensate.Comment: 1+18 pages, 1 figure, comments and references adde

Complicaciones de la radioterapia cervicofacial. Osteorradionecrosis.

El tratamiento de los tumores de la cavidad bucal incluye en la mayoría de los casos la combinación de cirugía y radioterapia. Dentro de las secuelas de la radioterapia de la región cervicofacial podemos distinguir efectos agudos como radiodermitis, mucositis e hiposialia,y efectos tardios como necrosis cutánea, mucosa y ósea.La necrosis ósea u osteorradionecrosis es la complicación más severa de la radioterapia cervicofacial, siendo la mandibula la zona de la cavidad bucal que presenta una mayor incidencia. En este artículo presentamos una revisión bibliográfica de los efectos secundarios de la irradiación en la región de cabeza y cuello, haciendo especial hincapié en la osteorradionecrosis, describiendo su fisiopatología, clínica,diagnóstico,tratamiento y medidas preventivas encaminadas a minimizar o evitar esta patología

Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl2(center dot-) radical

NOTICE: this is the author’s version of a work that was accepted for publication in Water Research. Changes resulting from the publishing process, such as peer review, editing, corrections,structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in WATER RESEARCH [VOL 47, ISSUE 1, (January 2013)] DOI 10.1016/j.watres.2012.10.018¨ IWA Publishing : Set statement to accompany deposit, "©IWA Publishing 2013. The definitive peer-reviewed and edited version of this article is published in Water Research 47 1 351-362 2013 DOI 10.1016/j.watres.2012.10.018 and is available at www.iwapublishing.com."The reaction of phosphor-containing pesticides such as methidathion (MT) and dimethoate (DM) with dichloride radical anions (Cl-2(center dot-)) was investigated. The second order rate constants (1.3 +/- 0.4) x 10(8) and (1.1 0.4) x 10(8) M-1 s(-1) were determined for the reaction of Cl-2(center dot-) with MT and DM, respectively. A reaction mechanism involving an initial charge transfer from the sulfide groups of the insecticides to Cl-2(center dot-) is proposed and supported by the identified transient intermediates and reaction products. The formation of chlorinated byproducts was determined. The unexpected consequences of an efficient Cl-2(center dot-) activity towards MT and DM on the degradation capacity by Advanced Oxidation Procedures applied to polluted waters containing the insecticides and Cl- anions is discussed. (C) 2012 Elsevier Ltd. All rights reserved.This research was financially supported by Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Agencia Nacional de Promocion Cientifica y Tecnologica (Argentina, project PICT 2007 number 00308), and Agencia Espanola de Cooperacion Internacional (project A/8199/07). MCG, JAR and PC are research members of Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Argentina. D.O.M. is a research member of CICPBA, Argentina. This research was supported by the grant PIP 112-200801-00356 from CONICET.Caregnato, P.; Rosso, JA.; Soler Escoda, JM.; Arques Sanz, A.; Martire, DO.; González, MC. (2013). Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl2(center dot-) radical. Water Research. 47(1):351-362. https://doi.org/10.1016/j.watres.2012.10.018S35136247

Valoración de los métodos de tinción con azul de toluidina y lugol en el diagnóstico precoz del cancer bucal

La mayoría de carcinomas escamosos bucales son diagnosticados en estadíos avanzados a pesar de la accesibilidad de la cavidad bucal a la exploración clínica. Es muy importante, por tanto, realizar un diagnóstico precoz de las lesiones premalignas y malignas de la cavidad bucal, y establecer· programas de prevención y control de los grupos de riesgo. Una de las líneas de investigación en este sentido se basa en la utilización de tinciones in vivo de la mucosa bucal como pruebas de cribaje en poblaciones susceptibles, entre ellas el azul de toluidina y ellugol. El azul de toluidina es una tinción acidofilica con una apetencia selectiva para los ácidos nucleicos; su utilidad se basa en que las células displásicas y anaplásicas contienen cuantitativamente mayor cantidad de ácidos nucleicos y, por tanto, captan más fácilmente la tinción. El lugol es una tinción con afinidad por el glucógeno de las células epiteliales normales y no es retenido por las células tumorales. El objetivo de este artículo es establecer, basándonos en la literatura publicada al respecto, la importancia de ambos métodos de tinción en el despistaje de las lesiones premalignas y malignas de la cavidad bucal

An Effect of α′\alpha' Corrections on Racetrack Inflation

We study the effects of $\alpha '$ corrections to the K\"ahler potential on volume stabilisation and racetrack inflation. In a region where classical supergravity analysis is justified, stringy corrections can nevertheless be relevant for correctly analyzing moduli stabilisation and the onset of inflation.Comment: 13 pages, 4 figures. Typos corrected, references added, this version to appear in JHE