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Evaluation of Apical Sealing Ability of a Calcium Silicate-Based Root Canal Sealer nRoot SP Using Different
Xin Wang1, Pengfei Zhang1, Yueyi Yang1
1Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai, China; National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, 200011, China; Shanghai Key Laboratory of Stomatology, Shanghai, 200011, China.
Objectives:
Well-qualified obturation, especially in the apical region, is the key to successful root canal treatment. The objective of the current study was to evaluate and compare the apical sealing ability of the calcium silicate-based root canal sealer nRoot SP with AH Plus and iRoot SP using both single-cone (SC) and continuous wave condensation (CWC) techniques.
Methods:
In total, 102 extracted human anterior teeth were decoronated and 12 mm of each root was preserved. After root preparation, the teeth were randomly divided into 6 groups of 17 teeth each: AH Plus with the SC technique, AH Plus with the CWC technique, iRoot SP with the SC technique, iRoot SP with the CWC technique, nRoot SP with the SC technique and nRoot SP with the CWC technique. The apical sealing ability of the teeth was measured by dye penetrant examination and scanning electron microscopy (SEM). The data were analysed using student's t-test or one-way ANOVA with Tukey's post hoc analysis for multiple comparisons. The results were considered statistically significant if P < .05.
Results:
nRoot SP and iRoot SP combined with both SC and CWC techniques demonstrated less apical dye leakages than did the AH Plus groups (P < .001). However, nRoot SP and iRoot SP showed similar apical dye leakages in both the SC and CWC subgroups (nRoot SP/SC and iRoot SP/SC groups (P = .673); nRoot SP/CWC and iRoot SP/CWC groups (P = .959)). Meanwhile, the apical dye leakages of the 3 sealers used within the SC and CWC subgroups were not statistically significant (AH Plus/SC and AH plus/CWC (P = .072); iRoot SP/SC and iRoot SP/CWC (P = .231); nRoot SP/SC and nRoot/CWC (P = .081)). In addition, the microgaps in both the nRoot SP and iRoot SP groups were much smaller than those in the AH Plus groups. Finally, the gap widths in the SC subgroups were slightly larger than those in the CWC subgroups.
Conclusion:
The apical sealing ability of nRoot SP is similar to that of iRoot SP with the SC and CWC techniques. nRoot SP and iRoot SP demonstrate better apical sealing ability than AH Plus with the SC and CWC techniques.
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