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Acta Odontológica Venezolana

versión impresa ISSN 0001-6365

Resumen

MANZUR CONTE, Aldo Javier; CASTILLA ARROYO, Gabriel; ANDRADE, Luz María  y  SILVA-HERZOG FLORES, Daniel. Influencia de dos geles de clorhexidina en la remoción del barro dentinario. Acta odontol. venez [online]. 2005, vol.43, n.2, pp.119-124. ISSN 0001-6365.

Complete removal of smear layer guarantees adecuate seal of the root canal, however most irrigants aren’t able to remove it all. The objectives of the present investigation were: to create two chlorhexidine gels using 2% chlorhexidine and natrosol, to determine their physicochemical characteristics such as viscosity and pH, and to evaluate the removal capacity of smear layer in middle and apical thirds of the root canal using scanning electron microscopy. In the gels manufacture were used 2% liquid chlorhexidine combined with 0.5% and 1% natrosol. Middle and apical thirds of root canals from 32 extracted mandibular premolars were observed with scanning electron microscopy. The sample was divided in four groups: two experimental groups irrigated with 0.5% and 1% chlorhexidine gel respectively, one negative control irrigated with distilled water, and one positive control group irrigated with 5.25% sodium hypochloryde and 17% EDTA. No statistical significative differences were found between the gels and the negative control group. There were significative statistical differences between the positive control group and the other groups. Combination of sodium hypochloride and EDTA was more efficient in smear layer removal, therefore the authors don’t recommend the use of chlorhexidine gels for smear layer removal from the root canal walls.

Palabras clave : chlorhexidine; gel; natrosol; smear layer.

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