Efficacy of several techniques for the removal of calcium hydroxide medicament from root canals
Article first published online: 28 JAN 2011
© 2011 International Endodontic Journal
International Endodontic Journal
Volume 44, Issue 6, pages 505–509, June 2011
How to Cite
Taşdemir, T., Çelik, D., Er, K., Yildirim, T., Ceyhanli, K. T. and Yeşilyurt, C. (2011), Efficacy of several techniques for the removal of calcium hydroxide medicament from root canals. International Endodontic Journal, 44: 505–509. doi: 10.1111/j.1365-2591.2011.01854.x
- Issue published online: 1 APR 2011
- Article first published online: 28 JAN 2011
- Received 22 August 2010; accepted 20 December 2010
- calcium hydroxide removal;
- passive ultrasonic agitation;
- root canal
Taşdemir T, Çelik D, Er K, Yildirim T, Ceyhanli KT, Yeşilyurt C. Efficacy of several techniques for the removal of calcium hydroxide medicament from root canals. International Endodontic Journal, 44, 505–509, 2011.
Aim To compare the efficacy of several techniques for the removal of calcium hydroxide (Ca(OH)2) from root canals.
Methodology The root canals of 24 freshly extracted human mandibular premolars were prepared with ProTaper rotary instruments. The teeth were sectioned longitudinally along the length of the instrumented canals. The roots were subsequently reassembled with wires. After Ca(OH)2 was placed into the canals, four techniques were used for its removal. In Group I, the teeth were irrigated with 5 mL of 2.5% NaOCl. Group II was treated in the same manner as Group I, but 5 mL of 17% EDTA was used in addition to NaOCl. In Group III, the teeth were irrigated with 5 mL of 2.5% NaOCl and agitated by an ultrasonic unit. In Group IV, the teeth were irrigated with 5 mL of 2.5% NaOCl and a CanalBrush was used to remove the Ca(OH)2. The roots were disassembled and digital photographs were taken. Measurements of residual Ca(OH)2 were performed as percentages of the overall canal surface area. The data was analysed with one-way ANOVA with post hoc Tukey test.
Results Significantly less residual material was obtained with a CanalBrush and passive ultrasonic agitation of NaOCl than the other groups (P < 0.05). There was no significant difference between syringe delivery of NaOCl and NaOCl + EDTA (P > 0.05).
Conclusions None of the techniques removed the Ca(OH)2 dressing completely. CanalBrush and ultrasonic agitation of NaOCl were significantly more effective than irrigant-only techniques.