Revista de Odontologia da UNESP
ISSN 1807-2577 (Eletrônico)
Artigo Original

Avaliação in vitro da influência da lima patência na manutenção do comprimento de trabalho

In vitro evaluation of the influence of patency file in maintaining the working length

Jaqueline Alves Yamaji BARROSO; Joana Yumi Teruya UCHIMURA; Marcos Sergio ENDO; Nair Narumi Orita PAVAN; Alfredo Franco QUEIROZ

Resumo

Resumo: Objetivo: Este trabalho teve como objetivo avaliar a influência da lima patência na manutenção do comprimento de trabalho (CT) durante o preparo coroa-ápice, utilizando o sistema oscilatório em canais artificiais de acrílico.

Material e método: Foram utilizados 30 cubos de acrílico: a) grupo 1 (n=10): sem a lima patência e preparo no CT (CT=16 mm); b) grupo 2 (n=10): com a lima patência K#10, comprimento de patência de 17 mm e preparo no CT; c) grupo 3 (n=10): sem a lima patência, uso de uma lima K#10 em 16 mm para recapitulação e preparo no CT. Água destilada foi utilizada como solução irrigadora. O resultado foi analisado estatisticamente pelos testes de Levene e Kruskal-Wallis (p≤0,05), pelos quais se tornou possível observar a perda do comprimento de trabalho após a instrumentação, em diferentes abordagens, em relação à lima patência.

Resultado: Os resultados obtidos demonstraram que houve diferença estatisticamente significante entre os grupos 1 e 3 quando comparados ao grupo 2; entretanto, ao comparar-se o grupo 1 com o grupo 3, estes apresentaram semelhanças estatísticas. O grupo 2 foi o único que conservou o CT após a instrumentação em 16 mm, enquanto os grupos 1 e 3 apresentaram uma perda de até 2 mm do CT.

Conclusão: Conclui-se que a lima patência em 1 mm além do CT mostrou-se eficaz na manutenção do seu comprimento durante o preparo do canal radicular.

Palavras-chave

Endodontia, lima de patência, patência apical

Abstract

Abstract: Objective: This study aimed to evaluate the influence of patency file in maintaining the working lenght (WL) for the crown-down preparation using oscillating system in artificial canals of acrylic.

Material and method: Thirty acrylic cubes were divided: a) Group 1 (n=10): without patency file and it were prepared in CT (CT=16 mm); b) Group 2 (n=10): with the patency #10 K-file, patency length of 17 mm and it were prepared in CT; and c) Group 3 (n=10): without patency file, using a #10 K-file in 16 mm for recapitulation and it were prepared in CT. Distilled water was used as irrigating solution. The results were statistically analyzed by the Levene and the Kruskal-Wallis test (p≤0.05), where it observed the loss of WL after instrumentation in different approaches to patency file.

Result: The results showed a statistically significant difference between groups 1 and 3 compared to group 2, however the group 1 be compared in relation to these 3 showed statistical similarities. Group 2 was the one who saved the WL after instrumentation in 16 mm, while group 1 and 3 showed a loss of up to 2 mm WL.

Conclusion: It was concluded that the patency file at 1 mm beyond the WL was effective in maintaining its length during root canal preparation.
 

Keywords

Endodontics, patency file, apical patency

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