Effect of Irrigating Needles on Irrigating Effect of S-shaped Curved Root Canal

doi:10.13701/j.cnki.kqyxyj.2023.01.006

Abstract

Abstract: Objective: To compare the irrigating effect using two commonly used irrigating needles inside a S-shaped curved root canals. Methods: Eighty resin simulated curved S-shaped root canals were randomly divided into two groups: IrriFlex group (group A) and NaviTip FX group (group B), with 40 prepared to 25^#0.06 taper and 30^#0.04 taper, respectively. Group A1 (IrriFlex, maximum irrigation length, 25^#0.06 taper), group B1(NaviTip FX, maximum irrigation length, 25^#0.06 taper), group A2 (IrriFlex, maximum irrigation length, 30^#0.04 taper), group B2 (NaviTip FX, maximum irrigation length, 30^#0.04 taper), groupA3 (IrriFlex, 4 mm from apical foramen, 25^#0.06 taper) and group B3 (NaviTip FX, 4 mm from apical foramen, 25^#0.06 taper), group A4 (IrriFlex, 4 mm from apical foramen, 30^#0.04 taper), and group B4 (NaviTip FX, 4 mm from apical foramen, 30^#0.04 taper), with 10 samples in each group (n=10). The 3 mL 3 %NaClO was used as irrigation solution to rinse root canals which filled with 1 mL methylene blue stain.After taking pictures with a dental microscope,the images were measured to obtain the distance from the tip to the apical foramen and the length of the methylene blue remaining in the apical region. SPSS 25.0 software package was used for statistical analysis. Results: When IrriFlex group was irrigated at the maximum irrigation length, the depth of IrriFlex group was closer to the apical foramen than NaviTip FX group (P<0.001), and the length of residual methylene blue in the apical region was significantly shorter (P<0.001). In the IrriFlex group, the two terminal preparation numbers had no significant effect on the irrigating effect (P>0.05), while in the NaviTip FX group, the length of residual methylene blue in the 25^#0.06 taper was slightly shorter than that in the 30^#0.04 taper (P<0.05). When irrigating at 4 mm from apical foramen, there was no significant difference in the length of residual methylene blue between the IrriFlex group and the NaviTip FX group (P>0.05), and the length of residual methylene blue in the 25^#0.06 taper subgroup was slightly shorter than that in the 30^#0.04 taper subgroup (P<0.05). Conclusion: In S-shaped curved root canals, IrriFlex is more convenient for further irrigating than NaviTip FX. Increased final preparation taper were suggested when using NaviTip FX to abtain better irrigation effect.

Key words: root canal irrigation, S-shaped curved root canal, root canal preparation morphology, NaviTip FX, IrriFlex

TANG Yumu, LU Le, XU Ke, CHEN Yumao. Effect of Irrigating Needles on Irrigating Effect of S-shaped Curved Root Canal[J]. Journal of Oral Science Research, 2023, 39(1): 32-36.

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