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1.
Rev. odontol. UNESP (Online) ; 51: e20220005, 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1377171

ABSTRACT

Introduction: Some experimental models have been used to evaluate the use of biomaterials in bone regeneration. Among them are the critical size defects (CSD) created in rat calvaria. An experimental model has been described in the literature, in which "L" markings are performed on the margins of the bone defects in order to assist in the precise identification of these defects during laboratory processing and analysis of the results. In the proposed model, the "L" markings are filled with amalgam. Objective: The purpose of the present study was to evaluate the amalgam replacement of an experimental bony defect model in rat calvaria by heated or unheated glass ionomer. Material and method: 24 rats were used. A 5 mm CSD was created at each animal calvaria. Two "L" shaped markings were made 2 mm from the margins of the bone defect, filled with amalgam (Group AM), heated glass ionomer cement (Group GIh) or not (Group GI). The animals were euthanized 15 days postoperatively. The areas of the surgical defect and the L-shaped marking were histomorphometrically analyzed and the data were analyzed statistically (p <0.05). Result: There were no significant clinical, histological or methodological differences among the experimental groups. Conclusion: It can be concluded that GI can replace AM in the proposed experimental model and GI heating did not promote additional benefits.


Introdução: Alguns modelos experimentais têm sido usados para avaliar o uso de biomateriais na regeneração óssea. Entre eles estão os defeitos de tamanho crítico (DTC) criados em calvárias de ratos. Um modelo experimental foi descrito na literatura onde marcações em L são realizadas nas margens do defeito ósseo para auxiliar na identificação precisa desses defeitos durante o processamento laboratorial e análise dos resultados. No modelo experimental proposto, as marcações em "L" são preenchidas com amálgama. Objetivo: Avaliar a substituição do amálgama por ionômero de vidro aquecido ou não em um modelo experimental para identificação de defeito ósseo criado em calvária de ratos. Material e método: Foram utilizados 24 ratos. Um DTC de 5 mm de diâmetro foi criado na calvária de cada animal. Duas marcações em "L" foram realizadas a 2 mm das margens do defeito ósseo, preenchidas com amálgama (Grupo AM), ionômero de vidro aquecido (Grupo CIVaq) ou não (Grupo CIV). Os animais foram eutanasiados aos 15 dias pós-operatórios. A área do defeito cirúrgico e das marcações em "L" foram histomorfometricamente avaliadas e os dados estatisticamente analisados (p<0,05). Resultado: Não houve diferença estatisticamente significativa entre os grupos experimentais para as análises metodológicas, clínicas ou histomorfométrica realizadas. Conclusão: Dentro dos limites deste estudo, pode-se concluir que CIV pode substituir o AM no modelo experimental proposto e o aquecimento do CIV não promoveu benefícios adicionais.


Subject(s)
Rats , Skull , Biocompatible Materials , Bone Regeneration , Dental Amalgam , Glass Ionomer Cements , Mathematical Computing , Analysis of Variance
2.
Braz. J. Pharm. Sci. (Online) ; 57: e181086, 2021. tab, graf
Article in English | LILACS | ID: biblio-1350237

ABSTRACT

Malaria is nowadays one of the most serious health concerns in a global scale and, although there is an evident increase in research studies in this area, pointed by the vast number of hits and leads, it still appears as a recurrent topic every year due to the drug resistance shown by the parasite exposing the urgent need to develop new antimalarial medications. In this work, 38 molecules were synthesized via copper(I)-catalyzed alkyne-azide cycloaddition (CuAAC) or "click" chemistry, following different routes to produce 2 different organic azides, obtained from a 4,7 dicholoquinoline, reacted with 19 different commercially available terminal alkynes. All those new compounds were evaluated for their in vitro activity against the chloroquine resistant malaria parasite Plasmodium falciparum (W2). The cytotoxicity evaluation was accomplished using Hep G2 cells and SI index was calculated for every molecule. Some of the quinoline derivatives have shown high antimalarial activity, with IC50 values in the range of 1.72-8.66 µM, low cytotoxicity, with CC50>1000 µM and selectivity index (SI) in the range of 20-100, with some compounds showing SI>800. Therefore, the quinolinotriazole hybrids could be considered a very important step on the development of new antimalarial drugs


Subject(s)
In Vitro Techniques/instrumentation , Chloroquine/administration & dosage , Malaria/drug therapy , Antimalarials/analysis , Plasmodium falciparum/metabolism , Research/classification , Drug Resistance/drug effects , Chimera/abnormalities , Inhibitory Concentration 50 , Click Chemistry
3.
Int. arch. otorhinolaryngol. (Impr.) ; 24(3): 359-363, July-Sept. 2020.
Article in English | LILACS-Express | LILACS | ID: biblio-1134153

ABSTRACT

Abstract Introduction Severe acute respiratory syndrome coronavirus 2 was first described in December 2019 in China leading to a Public Health Emergency of International Concern. It was named by the World Health Organization as Coronavirus Disease 2019 (COVID-19), and it garnered unprecedented attention from public health researchers around the world, and studies analyzing chloroquine and hydroxychloroquine as a possible therapy have arisen in the last 2 months. Objective To review the literature and describe updated facts about the ototoxicity of chloroquine and hydroxychloroquine, an important side effect that can be present in patients with COVID-19 treated with these drugs. Data Synthesis The most typical treatment regimen is 5 days of hydroxychloroquine at daily doses of 400 to 600 mg. There is no randomized clinical trial that can prove so far the efficacy of this medication, and few studies have evaluated adverse events potentially linked to their use in patients with COVID-19. While there is no concrete evidence on the incidence of ototoxicity using chloroquine in the short term, we need to consider that, as a pandemic disease, millions of patients with COVID-19 may receive this treatment, and ototoxicity can be a possible adverse event. Conclusion Despite the urgent global situation caused by the COVID-19, the risk of irreversible hearing loss may outweigh the unproven benefit of using hydroxychloroquine or chloroquine, especially in patients with mild forms of COVID-19, who may be cured with supportive treatment. The potential hearing loss that can be caused by these medications may advise against their use in COVID-19 patients.

4.
Clín. int. j. braz. dent ; 5(4): 398-406, out.-dez. 2009. ilus
Article in Portuguese | LILACS, BBO | ID: lil-716574

ABSTRACT

Nos dias atuais a busca por conforto, função e estética imediatos, aliada à evolução científica, volta o foco das ações clínicas e pesquisas científicas para assuntos como aplicação de carga imediata em todas as situações de edentulismo, seja ele total, parcial ou unitário. Principalmente em casos de pacientes jovens, com convício social intenso, e em uma época na qual a imagem está diretamente ligada ao sucesso profissional, a aplicação de tal técnica torna-se imperativa e de alta relevância clínica. Este artigo apresenta a revisão da literatura científica atual sobre carga imediata em implantes unitários e propõe um guia clínico, por meio do relato do caso de um paciente com comprometimento de elemento dentário anterior e exigência estética imediata em que se optou pela instalação de implante dentário e aplicação de carga imediata.


The seek for immediate esthetic, functional, and comfortable solutions, associated to the scientific evolution, have focused the scientific researches on immediate loading of fully or partially edentulous patients. Today, the appearance is directly associated to professional success. The immediate loading is primarily indicated for young patients, with intense social activity, and it is considered highly relevant in these cases.


Subject(s)
Humans , Male , Adult , Dental Implants, Single-Tooth , Dental Prosthesis , Esthetics, Dental , Immediate Dental Implant Loading
5.
Rev. Inst. Med. Trop. Säo Paulo ; 51(3): 149-154, May-June 2009. graf, tab
Article in English | LILACS | ID: lil-517098

ABSTRACT

Spleen cells from mice were examined at 5, 10, 15, 20 and 25 days post-infection (dpi) with Dermatobia hominis larva and at 5, 10, 15, 30 and 60 days post-larval emergence (dple). Cell proliferation in vitro assays were carried out with RPMI-1640 medium and larval secretory product (LSP) of D. hominis at 5, 10, 15, 20 and 25 days. When each group of mice was tested against each medium, significance was only seen for 25 dpi, with increasing order: LSP-10 d, -25 d, -5 d, -20 d, -15 d and RPMI. Significant results were also observed when each medium was tested against mice at each dpi or dple. Each dple group vs. each medium produced significant results only for 10 dple, with increasing order: LSP-5 d, -20 d, -25 d, -10 d, -15 d and RPMI. Comparative tests were also carried out between groups to refine certain observations. The LSPs were also analyzed using SDS-PAGE. The results prove that myiasis caused depletion of spleen cells, particularly under the effect of the LSP-10 and -15, but the cells tended to increase up to 60 dple. This in vitro assay may represent the real systemic immune response in the relationship LSP-D. hominis-host.


Células do baço de camundongos foram examinadas aos 5, 10, 20 e 25 dias pós-infecção (dpi) com Dermatobia hominis e examinadas aos 5, 10, 15, 30 e 60 dias pós-emergência da larva (dpel). As células foram cultivadas em meio RPMI-1640 contendo, ou não (controle), produtos de secreção das larvas (PSL) de D. hominis com idade de 5, 10, 15, 20 e 25 dias. Em cada grupo com cinco camundongos testados nos meios de cultura, o número de células foi significativo para 25 dpi, com crescente aumento na seguinte ordem: PSL-10 d, -25 d, -5 d, -20 d, -15 d e RPMI. Resultados significantes foram também observados nos testes entre cada meio contendo células tanto de camundongos dpi ou dpel. Em cada dpel grupo versus meio significância foi somente verificada para 10 dpel, na ordem crescente: PSL-5 d, -20 d, -25 d, -10 d, -15 d e RPMI. Testes comparativos foram também realizados entre grupos. O PSL foi analisado sob SDS-PAGE. Os resultados provam que a miíase causou depleção de células do baço, particularmente sob efeito do PSL-10 e -15, mas ocorreu normalidade do número de células aos 60 dpel. Este ensaio in vitro pode representar uma resposta imune sistêmica na relação PSL-D. hominis-hospedeiro.


Subject(s)
Animals , Male , Mice , Cell Proliferation , Myiasis/pathology , Skin/parasitology , Spleen/pathology , Diptera , Larva , Myiasis/immunology , Skin/pathology , Spleen/immunology , Time Factors
6.
Rev. bras. enferm ; 53(2): 291-4, abr.-jun. 2000.
Article in Portuguese | LILACS, BDENF | ID: lil-296260

ABSTRACT

O "hospice" é um movimento relacionado com o "cuidar" do paciente e da família diante da morte e do processo de morrer. Tem como recursos básicos: dar conforto e cuidados de enfermagem, acalmar e assistir o paciente, com liberdade total de visitas de seus familiares, atribuindo ao paciente e família maior poder decisório do que teria em hospitais. O "Hospice"não é um espaço geográfico, territorial, demarcado pelo que se denomina "instituição". Mais do que isso, é um comportamento, uma postura diante do processo de morrer e da morte em si. O trabalho relata a experiência da atuação da equipe multiprofissional no modelo "hospice" implantado na Escola de Enfermagem da Universidade Federal da Bahia, onde ficou demonstrada a necessidade de conhecer e estudar tanatologia, ter uma mudança de atitude frente à morte e ao processo de morrer, e ter habilidade em lidar com a própria terminalidade.


Subject(s)
Humans , Attitude to Death , Thanatology , Terminally Ill , Nursing Care , Models, Nursing
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