In vitro penetration of two cements into artificially created lateral canals

Objective: The aim of this study was to assess the penetration of two obturation materials, Guta-percha (Konne Ind. e Com. Ltda., Belo Horizonte, Brazil) / Pulp Canal Sealer (Kerr Sybron, Romulus, USA) and Resilon (Resilon Research LLC, Madison, CT, USA) / Epiphany (Pentron Clinical Technologies, Wallingford, CT, USA), into artificially created lateral canals. Methods: Twenty upper, single-rooted human teeth with full or partial crown, straight root and radiograph suggesting one root canal were selected. Six lateral canals were created on each root, two on each third. The teeth were then divided randomly into 2 groups of 10 teeth each. The continuous wave of condensation technique was used to obturate all canals. After obturation, the roots were sectioned cross-sectionally into 3 segments with a diamond disc to expose the lateral canals. The segments were fixed in a fast curing epoxy resin and micrographs of the lateral canals magnified 20 times were taken. The software Carnoy 2.0 was then used to measure obturation material penetration into each lateral canal. The data were treated by the non-parametric Kruskal-Wallis test. Results: The extent of the lateral canals penetrated by the two obturation materials did not differ significantly in any of the root thirds (p>0.05). Conclusion: Both obturation materials, Guta-percha (Konne Ind. e Com. Ltda., Belo Horizonte, Brazil) / Pulp Canal Sealer (Kerr Sybron, Romulus, USA) and Resilon (Resilon Research LLC, Madison, CT, USA) / Epiphany (Pentron Clinical Technologies, Wallingford, CT, USA), presented good penetration, which did not differ significantly. (AU) Objetivo: Avaliar a capacidade de selamento de canais laterais simulados frente a dois sistemas obturadores: Guta-percha (Konne Ind. e Com. Ltda., Belo Horizonte, Brasil) e cimento Pulp Canal Sealer (Kerr Sybron, Romulus, USA) e Resilon (Resilon Research LLC, Madison, CT, USA) com Epiphany (Pentron Clinical Technologies, Wallingford, CT, USA). Metodos: Foram selecionados 20 dentes humanos unirradiculares superiores, com coroas totais ou parcialmente integras, raizes retas e imagem radiografica sugestiva de um canal. Foram confeccionados seis canais laterais, com a utilizacao de uma broca Long Neck ½ (Dentsply-Maillefer, Ballaigues, Suica), em cada especime, sendo igualmente distribuido nos 3 tercos radiculares. Posteriormente, os dentes foram divididos aleatoriamente em 2 grupos de 10 dentes. A tecnica de obturacao utilizada foi a Onda Continua de Condensacao. Apos as obturacoes, as raizes foram seccionadas transversalmente com um disco de diamante em 3 segmentos, que possibilitou a visualizacao dos canais laterais. Os segmentos foram incluidos em uma resina epoxica de presa rapida. As imagens dos tercos radiculares inseridos em resina epoxica foram capturadas em lupa estereomicroscopica, com aumento de 20 vezes. Foram realizadas medicoes lineares das obturacoes em cada um dos canais dos diferentes segmentos dos dentes de cada grupo atraves do programa Carnoy 2.0. Os dados foram submetidos a analise estatistica utilizando o teste nao parametrico de Kruskall-Wallis. Resultados: A analise dos resultados demonstrou nao haver diferenca estatistica no escoamento entre os materiais obturadores e seus tercos apicais, medios e cervicais (p > 0,05). Conclusao: Concluiu-se que os dois materiais obturadores, apresentaram um bom escoamento nos canais laterais, nao havendo diferenca estatistica entre eles. (AU)