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Memorias del Instituto de Investigaciones en Ciencias de la Salud

versão On-line ISSN 1812-9528


RAMOS, Ester  e  ADORNO, Carlos G. Irrigant extrusion according to irrigation technique in human teeth, ex vivo. Mem. Inst. Investig. Cienc. Salud [online]. 2016, vol.14, n.1, pp.50-56. ISSN 1812-9528.

Root canal irrigants should be able reach the entire root canal system, including the most apical portions, in order to achieve better cleaning and disinfection. However, there exists a risk of irrigant extrusion to the perirradicular area. The present study had an experimental design with the purpose of evaluating irrigant apical extrusion of the endodontic irrigant according to the irrigating technique during final irrigation y extracted human teeth, ex vivo. Forty six anterior upper single canaled teeth were used and the roots were embedded into a conducting transparent gel. An irrigating/aspirating needle was placed 2 mm from working length and irrigation was performed with a contrast solution at 4 ml/min during 60 s. Eighteen teeth were used for syringe irrigation and negative pressure irrigation each. Additionally, 5 teeth were used for positive and negative controls, each. The presence and extrusion area were evaluated. The Chi2 test found a statistically significant asociation (p < 0,001) between extrusion and irrigation technique. The median area of extrusion by syringe irrigation (0,645 mm2) was statistically greater than that by negative pressure irrigation (0 mm2) (Mann Whitney U, p <0,001). In conclusion, the frequency and extent of extrusion caused by negative pressure irrigation was less compared to syringe irrigation.

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