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Previous issue date: 2015-06-30 / Technically all steps are crucial to obtain excellence in required endodontic treatment. To minimize accidents during the preparation chemical and mechanical changes in the methods and instrumentation in nickel titanium endodontic instruments has been suggested. New instruments are often launched on the market without proper knowledge of their properties and limitations, therefore, the purpose of this thesis was to evaluate the defects in surfaces of instruments reciprocantes Unicone and Prodesign, comparing them to the instruments of continuous rotation Prodesign S and Wizard Navigator. Each system was used three times in simulated root canals and the surfaces of instruments were analyzed by scanning electron microscopy. After statistical analysis of the results, it was concluded that the instruments reciprocantes Prodesign and Unicone presented a progressive increase of surface defects, suggesting that single use for increased security during the treatment. The instruments of continuous rotation Wizard Navigator and Prodesign S presented smaller defects after the third use in relation to flute deformation, but with a trend to enhance material loss. In addition, a review of the literature was performed to cover the findings of recent years on reciprocal and continuous systems. / Tecnicamente todas as etapas s?o cruciais para obter-se excel?ncia no tratamento endod?ntico. Visando a minimizar acidentes durante a realiza??o do preparo qu?mico-mec?nico, modifica??es nos m?todos de instrumenta??o e nos instrumentos endod?nticos de n?quel tit?nio t?m sido sugeridas. Novos instrumentos s?o muitas vezes lan?ados no mercado sem o devido conhecimento de suas propriedades e limita??es, portanto o objetivo desta tese foi avaliar os defeitos de superf?cies dos instrumentos reciprocantes Unicone e Prodesign, comparando-os aos instrumentos de rota??o cont?nua Prodesign S e Wizard Navigator. Cada sistema foi utilizado tr?s vezes, em canais simulados, e as superf?cies dos instrumentos foram analisadas atrav?s da microscopia eletr?nica de varredura. Ap?s an?lise estat?stica dos resultados, concluiu-se que os instrumentos reciprocantes Prodesign e Unicone apresentaram aumento progressivo de defeitos de superf?cie, o que sugere utiliza??o ?nica para maior seguran?a durante o tratamento. Os instrumentos de rota??o cont?nua Wizard Navigator e Prodesign S apresentaram menores defeitos ap?s o terceiro uso em rela??o a deforma??o das espiras, por?m estes instrumentos apresentam uma tend?ncia maior a perda de material da superf?cie. Adicionalmente uma revis?o de literatura foi realizada com intuito de abranger os achados dos ?ltimos anos sobre sistemas rec?procos e cont?nuos.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/6353 |
| Date | 30 June 2015 |
| Creators | Laurindo, Fl?via Villela |
| Contributors | Figueiredo, Jos? Antonio Poli de |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, Brasil, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -8096554818733665164, 600, 600, 600, 4673435736271820140, -2070498469879244349 |
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