A carregar...
Publicação
Análise morfológica das agulhas de irrigação endodôntica
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 1.87 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Objetivo: Realizar uma análise morfológica e dimensional de agulhas de irrigação endodôntica de diferentes fabricantes, comercializadas em Portugal, comparando-as com a norma ISO 9626:2016. Avaliaram-se o diâmetro externo e interno, a espessura da parede, a constância dimensional da cânula, o
comprimento útil e os orifícios laterais.
Materiais e métodos: Avaliaram-se 48 agulhas de quatro modelos distintos: Side-port Irrigating Tip, Coltene CanalPro Irrigation Probe (Coltène/Whaledent AG, Altstätten, Suíça), Max-i-Probe (Dentsply Rinn, Elgin, IL, EUA) e Flexible Irrigation Needle (Dentsply Maillefer, Ballaigues, Suíça). A análise recorreu a microscopia ótica com análise digital de imagem e a microscopia eletrónica de varrimento (MEV), em secções transversais obtidas após inclusão das amostras em resina epóxi.
Resultados: Observaram-se diferenças entre os modelos quanto ao diâmetro externo, diâmetro interno, espessura da parede, comprimento útil e orifícios laterais. O diâmetro externo não se manteve constante ao longo da cânula nos modelos metálicos. Os três modelos metálicos apresentaram diâmetros internos compatíveis com os requisitos mínimos da ISO 9626:2016 para parede fina.
Apenas um modelo metálico excedeu significativamente o limite máximo de 320 µm, não diferindo os restantes dois deste limite. A Flexible Irrigation Needle apresentou os maiores valores de diâmetro externo, diâmetro interno e espessura da parede, distinguindo-se pela configuração polimérica e conicidade nominal de 4%.
Conclusão: Os resultados evidenciam discrepâncias entre alguns modelos 30G e a norma ISO 9626:2016, sugerindo que a designação comercial 30G não garante uniformidade dimensional. As particularidades da Flexible Irrigation Needle revelam as limitações da aplicação direta da norma a dispositivos com materiais e geometrias inovadores, reforçando a necessidade de adaptar os referenciais normativos à evolução tecnológica.
Objective: To carry out a morphological and dimensional analysis of endodontic irrigation needles from different manufacturers, marketed in Portugal, comparing them with the ISO 9626:2016 standard. External and internal diameter, wall thickness, dimensional consistency of the cannula, working length, and side ports were assessed. Materials and methods: Forty-eight needles from four distinct models were evaluated: Side-port Irrigating Tip, Coltene CanalPro Irrigation Probe (Coltène/Whaledent AG, Altstätten, Switzerland), Max-i-Probe (Dentsply Rinn, Elgin, IL, USA), and Flexible Irrigation Needle (Dentsply Maillefer, Ballaigues, Switzerland). The analysis used optical microscopy with digital image analysis and scanning electron microscopy (SEM), on cross-sections obtained after embedding the samples in epoxy resin. Results: Differences were observed between models regarding external diameter, internal diameter, wall thickness, working length, and side ports. The external diameter was not constant along the cannula in the metallic models. The three metallic models showed internal diameters consistent with the minimum requirements of ISO 9626:2016 for thin wall. Only one metallic model significantly exceeded the maximum limit of 320 µm, the remaining two not differing from this limit. The Flexible Irrigation Needle showed the highest values of external diameter, internal diameter, and wall thickness, and was distinguished by its polymeric configuration and a nominal 4% taper. Conclusion: The results highlight discrepancies between some 30G models and the ISO 9626:2016 standard, suggesting that the commercial 30G designation alone does not guarantee dimensional uniformity. The particular features of the Flexible Irrigation Needle reveal the limitations of directly applying ISO 9626:2016 to devices with innovative materials and geometries, reinforcing the need to adapt normative references to the technological evolution of these devices.
Objective: To carry out a morphological and dimensional analysis of endodontic irrigation needles from different manufacturers, marketed in Portugal, comparing them with the ISO 9626:2016 standard. External and internal diameter, wall thickness, dimensional consistency of the cannula, working length, and side ports were assessed. Materials and methods: Forty-eight needles from four distinct models were evaluated: Side-port Irrigating Tip, Coltene CanalPro Irrigation Probe (Coltène/Whaledent AG, Altstätten, Switzerland), Max-i-Probe (Dentsply Rinn, Elgin, IL, USA), and Flexible Irrigation Needle (Dentsply Maillefer, Ballaigues, Switzerland). The analysis used optical microscopy with digital image analysis and scanning electron microscopy (SEM), on cross-sections obtained after embedding the samples in epoxy resin. Results: Differences were observed between models regarding external diameter, internal diameter, wall thickness, working length, and side ports. The external diameter was not constant along the cannula in the metallic models. The three metallic models showed internal diameters consistent with the minimum requirements of ISO 9626:2016 for thin wall. Only one metallic model significantly exceeded the maximum limit of 320 µm, the remaining two not differing from this limit. The Flexible Irrigation Needle showed the highest values of external diameter, internal diameter, and wall thickness, and was distinguished by its polymeric configuration and a nominal 4% taper. Conclusion: The results highlight discrepancies between some 30G models and the ISO 9626:2016 standard, suggesting that the commercial 30G designation alone does not guarantee dimensional uniformity. The particular features of the Flexible Irrigation Needle reveal the limitations of directly applying ISO 9626:2016 to devices with innovative materials and geometries, reinforcing the need to adapt normative references to the technological evolution of these devices.
Descrição
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Palavras-chave
Endodontia Irrigação endodôntica Agulhas de irrigação Normas ISO