IN VITRO DETERMINATION OF MINIMUM LENGTH PENETRATION OF A 27G MONOJECT NEEDLE TO IRRIGATE THE MAIN CANAL, AVOIDING EXTRUSION

Carlos Marchant, Fernando Aguirre, Eduardo Márquez, Marcelo Tapia

Resumen


Objective: To determine the minimum length penetration required of a monoject27G needle to irrigate the main canal, avoiding extrusion. 

Materials and methods: 52 teeth were used, decoronated and worked at equal lengths at a MAF 40. They were randomly assembled in 3 molds and irrigated with diluted Omnipaque. Central trend values were calculated using descriptive statistics. Barlett, Shapiro Wilk and ANOVA one-way tests were applied to analyze statistically significant differences. Subsequently the logistic regression of Oswell-Lemeshow was calculated to look for causality between variables. 

Results: Statistically significant results show that at higher needle penetration, the probability of extrusion is greater; regarding minimal length penetration to prevent extrusion, the safest length to irrigate is working length (WL) -4mm. 

Conclusions: The minimum length penetration to irrigate preventing extrusion is WL-4 mm.

Palabras clave


Endodontic irrigation; sodium hypochlorite; extrusion; endodontic treatment; endodontic

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DOI: https://doi.org/10.22370/asd.2020.1.2.2415

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