Wang Xin, Zhang Pengfei, Yang Yueyi, Yuan Keyong, Jing Meiling, Zhang Yujie, Tan Wenduo, Huang Zhengwei, Niu Chenguang, Ma Rui
Department 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.
Department 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.
Int Dent J. 2025 Jul 23;75(5):100916. doi: 10.1016/j.identj.2025.100916.
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.
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.
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.
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.
高质量的根管充填，尤其是根尖区的充填，是根管治疗成功的关键。本研究的目的是使用单锥法（SC）和连续波热牙胶垂直加压充填法（CWC）评估并比较硅酸钙基根管封闭剂nRoot SP与AH Plus和iRoot SP的根尖封闭能力。
总共收集102颗拔除的人前牙，截冠后保留每颗牙根12 mm。根管预备后，将牙齿随机分为6组，每组17颗：AH Plus单锥法组、AH Plus连续波热牙胶垂直加压充填法组、iRoot SP单锥法组、iRoot SP连续波热牙胶垂直加压充填法组、nRoot SP单锥法组和nRoot SP连续波热牙胶垂直加压充填法组。通过染料渗透试验和扫描电子显微镜（SEM）测量牙齿的根尖封闭能力。数据采用学生t检验或单因素方差分析，并采用Tukey事后检验进行多重比较。如果P < 0.05，则认为结果具有统计学意义。
nRoot SP和iRoot SP联合SC和CWC技术显示出比AH Plus组更少的根尖染料渗漏（P < 0.001）。然而，nRoot SP和iRoot SP在SC和CWC亚组中显示出相似的根尖染料渗漏（nRoot SP/SC组和iRoot SP/SC组（P = 0.673）；nRoot SP/CWC组和iRoot SP/CWC组（P = 0.959））。同时，SC和CWC亚组中使用的3种封闭剂的根尖染料渗漏无统计学意义（AH Plus/SC组和AH Plus/CWC组（P = 0.072）；iRoot SP/SC组和iRoot SP/CWC组（P = 0.231）；nRoot SP/SC组和nRoot/CWC组（P = 0.081））。此外，nRoot SP组和iRoot SP组的微间隙均远小于AH Plus组。最后，SC亚组的间隙宽度略大于CWC亚组。
nRoot SP在SC和CWC技术下的根尖封闭能力与iRoot SP相似。nRoot SP和iRoot SP在SC和CWC技术下显示出比AH Plus更好的根尖封闭能力。
