Peri-implantite: do diagnóstico ao tratamento!

Os implantes dentários são hoje em dia amplamente divulgados e aceites como tratamento de reabilitação, em consequencia o estudo da doença peri-implantar é tema de crescente interesse para todos os especialistas implanto-próteticos. A mucosite, ou seja, a lesão inflamatória primária confinada aos tecidos moles, e a periimplantite, ou seja, a consequente infecção avançada do tecido ósseo peri-implantar, são doenças em que a primeira linha de defesa, para o clínico, consiste na identificação precoce dos sinais porque apenas o diagnóstico imediado permite a intervenção imediata e eficaz. Este trabalho tem como objetivo rever a literatura cientifica existente sobre a peri-implantite para lidar com os aspectos fundamentais da doença. Para a realização da pesquisa bibliográfica foram consultados artigos científicos em revistas dentárias específicas, artigos científicos disponíveis na net e livros relevantes, publicados ao longo do período de tempo entre os anos de 1992 e 2016.Dental implants are now widespread and accepted as rehabilitative treatment, therefore the interest in studying peri-implant diseases is increasing among all implant-prosthetic specialists. The mucositis, the primary inflammatory lesion specific of the soft tissues, and the periimplantitis, the consequent advanced infection of the peri-implant bone tissue, are diseases in which the first line of defence, for the clinician, consists in the early diagnosis. Only a timely diagnosis allows an immediate and effective intervention indeed. With this essay I am going to review the existing technical literature on peri-implantitis to deal with the key aspects of the disease. With regard to the bibliography, the contents of this essay are extracted and re-elaborated from scientific articles consulted in specific dental magazines and on the web, and from relevant books, published in the years between 1992 and 2016

Skin erythrodiapedesis during chronic venous disorders

Background: Extravasation of erythrocytes (erythrodiapedesis [ED]) is currently included among causes of skin damage in legs with chronic venous disorders (CVD) and ascribed to venular hypertension. ED is followed by erythrocyte disruption, degradation of hemoglobin, and storing of ferric iron into hemosiderin. The aim of this study was to evaluate the occurrence of ED in the skin of legs with different clinical stages of CVD. Methods: One hundred eighteen skin biopsies from legs with CVD underwent histologic evaluation for ED and hemosiderin deposition (HD). Results: ED was found in only 21/118 specimens. In particular, it was found in ulcer samples, in tissues surrounding varicophlebitis and, finally, in acute eczematous skin. ED was found in only 15/30 samples showing HD. Conclusion: Our findings confirm the occurrence of ED during CVD. However, it was found only in concomitance of severe dermal inflammation. Hemosiderin deposition in the absence of actual ED could be explained with previous healed episodes of skin inflammation. However, ED is not likely the only cause of skin iron overload, which could also occur by a molecular mechanism. Further studies are needed to define the mechanism of iron deposition in the skin of legs afflicted with CVD. (J Vase Surg 2011;53:1649-53.

Peri-implantite: do diagnóstico ao tratamento!

Os implantes dentários são hoje em dia amplamente divulgados e aceites como tratamento de reabilitação, em consequencia o estudo da doença peri-implantar é tema de crescente interesse para todos os especialistas implanto-próteticos. A mucosite, ou seja, a lesão inflamatória primária confinada aos tecidos moles, e a periimplantite, ou seja, a consequente infecção avançada do tecido ósseo peri-implantar, são doenças em que a primeira linha de defesa, para o clínico, consiste na identificação precoce dos sinais porque apenas o diagnóstico imediado permite a intervenção imediata e eficaz. Este trabalho tem como objetivo rever a literatura cientifica existente sobre a peri-implantite para lidar com os aspectos fundamentais da doença. Para a realização da pesquisa bibliográfica foram consultados artigos científicos em revistas dentárias específicas, artigos científicos disponíveis na net e livros relevantes, publicados ao longo do período de tempo entre os anos de 1992 e 2016.Dental implants are now widespread and accepted as rehabilitative treatment, therefore the interest in studying peri-implant diseases is increasing among all implant-prosthetic specialists. The mucositis, the primary inflammatory lesion specific of the soft tissues, and the periimplantitis, the consequent advanced infection of the peri-implant bone tissue, are diseases in which the first line of defence, for the clinician, consists in the early diagnosis. Only a timely diagnosis allows an immediate and effective intervention indeed. With this essay I am going to review the existing technical literature on peri-implantitis to deal with the key aspects of the disease. With regard to the bibliography, the contents of this essay are extracted and re-elaborated from scientific articles consulted in specific dental magazines and on the web, and from relevant books, published in the years between 1992 and 2016

Age-related variations of varicose veins anatomy

Background: Primary varicose veins are commonly considered a progressive disease starting from the saphenous junctions and extending to tributaries in a retrograde fashion along the saphenous trunks. This theory has been criticized by studies indicating different patterns of development and progression of varicose veins. To contribute to the understanding of the pathogenesis of the disease, the anatomy of the venous bed was comparatively evaluated by duplex sonography in patients with varicose veins with a marked difference in age. Methods. The study included 100 varicose limbs in 82 patients aged < 30 years and 238 limbs in 183 patients aged > 60 years. Veins were designated as saphenous veins (SVs), tributaries of the SVs (STVs), and veins not connected with the SVs (NSVs). Four main anatomic patterns were comparatively evaluated: (1) varicose changes only along SVs, (2) varicose changes along SVs and STVs, (3) varicose changes only in STVs, and (4) varicose changes only in NSVs. Results. SVs were normal in 44% of varicose limbs. In most limbs from young subjects, varicose changes afflicted only SVTs (25%) and NSVs (36%). Varicose SVs were more frequent in the older group (62%) than in younger one (39%) owing to a higher prevalence of limbs with combined SV and STV varicosities (respectively, 59% and 37%). In the older group, varicosities in the STVs were more frequently observed in association with incompetence of the SV trunks. Conclusion: The frequent occurrence of normal SVs in varicose limbs of all patients does not support the crucial role commonly credited to SVs in the pathogenesis of primary varicosities. Moreover, the SV trunks were normal in most varicose limbs from young patients. These findings suggest that varicose disease may progressively extend in an antegrade fashion, spreading from the STVs to the SVs. This hypothesis suggests that the saphenous trunks could be spared in the treatment of a relevant number of varicose legs. Prospective longitudinal studies with serial duplex evaluations of large series of extremities are necessary to confirm this hypothesis

An Experimental and Theoretical Investigation of 1-Butanol Pyrolysis

Bioalcohols are a promising family of biofuels. Among them, 1-butanol has a strong potential as a substitute for petrol. In this manuscript, we report on a theoretical and experimental characterization of 1-butanol thermal decomposition, a very important process in the 1-butanol combustion at high temperatures. Advantage has been taken of a flash pyrolysis experimental set-up with mass spectrometric detection, in which the brief residence time of the pyrolyzing mixture inside a short, resistively heated SiC tube allows the identification of the primary products of the decomposing species, limiting secondary processes. Dedicated electronic structure calculations of the relevant potential energy surface have also been performed and RRKM estimates of the rate coefficients and product branching ratios up to 2,000 K are provided. Both electronic structure and RRKM calculations are in line with previous determinations. According to the present study, the H2O elimination channel leading to 1-butene is more important than previously believed. In addition to that, we provide experimental evidence that butanal formation by H2 elimination is not a primary decomposition route. Finally, we have experimental evidence of a small yield of the CH3 elimination channel

The Italian National Project of Astrobiology-Life in Space-Origin, Presence, Persistence of Life in Space, from Molecules to Extremophiles

The \u2018\u2018Life in Space\u2019\u2019 project was funded in the wake of the Italian Space Agency\u2019s proposal for the development of a network of institutions and laboratories conceived to implement Italian participation in space astrobiology experiments

Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions

We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

La conservazione preventiva del patrimonio librario come possibile alternativa al restauro tradizionale

The present paper focuses on the close relation between library collections and their preservation environment, aiming, in particular, at highlighting the importance of promoting and sustaining the monitoring. The paper proposes some simple and ready-to-use technologies – smart monitoring – to prevent future damages