2022, Vol. 26 ›› Issue (21): 3389-3393

Apical sealing of GuttaFlow Bioseal in oval-root canals

Shi Jinghua, Kang Wenyan, Man Dula, Liang Zhonghua, Wang Xiaoguang, Yin Yin, Zhang Lei   

Abstract: BACKGROUND: Tight obturation of oval root canals has become a major problem for clinicians. GuttaFlow Bioseal has good physical and chemical characteristics and biological properties, and its obturation of oval root canals has not been reported.
OBJECTIVE: To evaluate the apical sealing ability of GuttaFlow Bioseal root canal sealer in oval root canals.
METHODS: Ninety mandibular premolars with single oval-root canal were decoronated to obtain 14 mm root segments. The root canals were instrumented using Protaper files to F3. Roots were randomly divided into four groups. The root canals of group A (n=20) were obturated with AH-plus and the continuous wave of condensation technique. The root canals of group B (n=20) were obturated with iRoot SP and single gutta-percha cone. The root canals of group C (n=20) were obturated with GuttaFlow 2 and single gutta-percha cone. The root canals of group D (n=20) were obturated with GuttaFlow Bioseal and single gutta-percha cone. The group E (n=5) and group F (n=5) were served as the positive and negative control groups, respectively. The apical leakage and the filling of the lateral accessory canals were evaluated by dye penetration method and transparent teeth technique in each group.
RESULTS AND CONCLUSION: (1) There were significant differences in the length of leakage among groups A-D. The dye penetrated the entire length of the root canal in the positive control group. The dye did not penetrate into the root canal in the negative control group. The dye penetration length of group B was longer than that of groups A, C, and D (P < 0.05). The length of dye penetration among groups A, C, and D was not significantly different (P > 0.05). (2) The filling rate of lateral accessory root canals was not statistically significant among the group A (60%), group B (30%), group C (40%), and group D (50%) (P > 0.05). The overfilling rate in group A was significantly lower than that in groups B, C, and D (P < 0.05). There was no significant difference in the overfilling rate among groups B, C, and D (P > 0.05). (3) These results demonstrate that GuttaFlow Bioseal has good apical sealing ability and lateral accessory canal filling effect on oval root canals, with high filling efficiency, but with the disadvantage of high overfilling rate.
Key words: root canal obturation, root canal filling materials, apical sealing, GuttaFlow Bioseal, oval-root canal, tissue engineering