Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
Add more filters










Publication year range
1.
J Endod ; 35(10): 1387-90, 2009 Oct.
Article in English | MEDLINE | ID: mdl-19801236

ABSTRACT

INTRODUCTION: The aim of this study was to evaluate and compare the cytotoxic effects of BioAggregate (Innovative BioCaramix Inc, Vancouver, BC, Canada), a novel bioceramic nanoparticulate cement, on human mesenchymal cells. White Pro-Root MTA (Dentsply, Tulsa Dental, Tulsa, OK) was used as a reference for comparison. METHODS: Fifty-six human maxillary incisor teeth were submitted to a step-back flaring technique and prepared for cytotoxicity assay in an in situ root-end filling experimental model. After retro filling, each root containing MTA, BioAggregate, or empty root canals (control) was exposed to culture media for 24, 48, or 72 hours, providing several extraction media. Mesenchymal cells were incubated with each extract medium for 24 hours, and toxicity was evaluated by three different parameters of cell survival and integrity on the same sample: XTT, neutral red, and crystal violet dye elution. RESULTS: No statistically significant differences between MTA and BioAggregate were found in all the experimental periods (p > 0.05). CONCLUSION: DiaRoot BioAggregate displayed in vitro compatibility similar to MTA.


Subject(s)
Biocompatible Materials/toxicity , Ceramics/chemistry , Dental Cements/toxicity , Mesoderm/drug effects , Nanoparticles/chemistry , Root Canal Filling Materials/toxicity , Aluminum Compounds/pharmacology , Calcium Compounds/pharmacology , Cell Survival/drug effects , Cells, Cultured , Coloring Agents , Culture Media , Culture Media, Conditioned , Drug Combinations , Humans , Materials Testing , Mesoderm/cytology , Oxides/pharmacology , Retrograde Obturation , Silicates/pharmacology , Tetrazolium Salts , Thiazoles , Time Factors
2.
RSBO (Impr.) ; 6(1)20/03/2009.
Article in Portuguese | LILACS | ID: lil-509360

ABSTRACT

Introdução e Objetivo: avaliar in vitro a citotoxicidade de um cimento à base de óxido de zinco e eugenol - o Endofill e outros dois cimentos à base de resina epóxica, Sealer 26 e AH Plus sob a linhagem de células VERO C1008. Material e Métodos: A citotoxicidade foi avaliada através de um novo reagente que vem sendo usado em imunologia para extinguir a fluorescência denominado FluoroQuenchTM AO/EB e o uso do corante para avaliar as alterações morfológicas nas células em 24, 48 e 72 horas após o contato com os cimentos. Resultados: houveram diferenças nas médias dos valores da viabilidade celular pelos testes ANOVA e t de student. Em todos os períodos, os cimentos Endofill e Sealer 26, quando frescos e após o endurecimento, causaram uma diminuição significativa na densidade e na morfologia celular. Conclusão: O AH Plus provou ser o menos tóxico logo após a manipulação, enquanto que, uma leve reação tóxica pôde ser observada quando esse foi testado após o endurecimento.


Introduction and Objective: to determine the cytotoxicity of Endofill a zinc oxide-eugenol based sealer and two an epoxy resin based sealers, Sealers 26 and AH Plus. Material and Methods: This experiment included cell line VERO C1008 and the cytotoxicity was assessed with a new reagent to extinguish fluorescence, FluoroQuenchTM AO/EB, is added of dying target cells. Morphological cell changes were evaluate at three observation periods, 24, 48 and 72 hours. Results: It was showed differences in mean cell viability values were assessed by ANOVA and t-student. In all periods Endofill and Sealer 26 both fresh and set states, causing a significant decrease in cell density and morphological changes. Conclusion: AH Plus proved to be least toxic in freshly mixed, whereas less toxic reaction could be seen in relation to set state.Keywords: cytotoxicity, endodontic sealers, root canal.

3.
Rev. Assoc. Paul. Cir. Dent ; 61(2): 131-135, mar.-abr. 2007. tab, graf
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-543808

ABSTRACT

A utilização de soluções de EDTA. isolada ou associada ao hipoclorito de sódio, como auxiliar na instrumentação de canais radiculares atrésicos e na remoção do smear layer é bastante difundida. Neste trabalho foi avaliado o comportamento do quelante EDTA (liquido e gel) e sua difusão através dos túbulos dentinários. Os corpos de prova foram divididos em três grupos: Grupo 1 - EDTA 17%; Grupo 2 - EDTA 24% e Grupo 3 - EDTA gel trissódico. A técnica escolhida, para esse estudo, foi a reação histoquímica de sulfato de cobre e ácido rubeânico. Após o tratamento estatístico podemos concluir que: 1. Todas as substâncias quelantes estudadas se difundiram nos canalículos dentinários; 2. As substâncias empregadas se comportaram de maneira semelhante na difusão dos canalículos dentinários; 3. Não houve diferença estatística entre as permeabilidades médias dos terços das raízes envolvidas (p<0,05).


The use of the salt solution of EDTA, alone or in combination with NaOCl as an auxiliary in root canal instrumentation or in smear layer removing is very exposed in scientific literature. In this study were evaluated the EDTA chelant behavior (solution or gel) for its diffusion through the dentinal tubules. The teeth were divided in three groups: Group 1 - 17% EDTA; Group 2 - 24% EDTA and Group 3 - EDTA gel. They were submitted to a histochemical reaction with copper sulfate and rubianic acid. After statistical analyzes we could conclude that: 1. All the tested substances diffused through the dentinal tubules; 2. The tested substances diffused themselves through the dentinal tubules equally; 3. There is no statistical difference among the permeability of the tested root thirds (p

Subject(s)
Humans , Male , Female , Chelating Agents , Cuspid , Dentin , Edetic Acid , Root Canal Therapy
SELECTION OF CITATIONS
SEARCH DETAIL
...