Penetration depth of a dye marker into dentine using a novel hydrodynamic system (RinsEndo®)
Article first published online: 26 MAY 2007
International Endodontic Journal
Volume 40, Issue 8, pages 644–652, August 2007
How to Cite
Hauser, V., Braun, A. and Frentzen, M. (2007), Penetration depth of a dye marker into dentine using a novel hydrodynamic system (RinsEndo®). International Endodontic Journal, 40: 644–652. doi: 10.1111/j.1365-2591.2007.01264.x
- Issue published online: 10 JUL 2007
- Article first published online: 26 MAY 2007
- Received 13 March 2006; accepted 16 February 2007
- apical extrusion;
- cleansing efficacy;
- cleansing techniques;
- dentinal tubules;
- dye penetration;
- hydrodynamic irrigation
Aim To investigate the efficiency of a hydrodynamic irrigation system compared with conventional cleansing techniques in root canals.
Methodology Forty-five freshly extracted single-rooted teeth were de-coronated and their root canals were enlarged to size 30 at the apex. The teeth were randomly divided into three groups (n = 15) for the final rinsing sequence using 2% NaOCl plus acid fuchsin: group I: static application of irrigant, 3 min; group II: flushing with a syringe; 5-mL NaOCl, 1 min; group III: RinsEndo®-system; 5-mL NaOCl, 50 s. Apical extrusion was documented photographically. The roots were sectioned at 2, 4, 6 and 8 mm from their apices and the penetration depths of dye into dentine measured, using a stereomicroscope. Wilcoxon's test and Pearson's chi-squared test were employed to prove statistic relevance.
Results Greater dye penetration depth into the dentinal tubules was achieved when employing hydrodynamic rinsing procedures. Using this technique, 23% of the specimens were penetrated for more than 50% of their dentine thickness, whereas the results for flushing with a syringe were 12% (static application, 7%). No penetration of dentine occurred in 63% of specimens with static application, 39% flushing with a syringe and 15% using the hydrodynamic system (P < 0.05 Pearson's chi-squared test). Apical extrusion occurred more frequently after hydrodynamic rinsing (extruded specimens: RinsEndo® = 80%; static application/flushing with a syringe = 13%; P < 0.05 Pearson's chi-squared test).
Conclusions Hydrodynamic rinsing demonstrated an improvement over conventional methods in terms of dentine penetration of a dye marker. A higher risk of apical extrusion with the RinsEndo®-system was evident.