Journal of Prevention and Treatment for Stomatological Diseases ›› 2019, Vol. 27 ›› Issue (2): 95-99.doi: 10.12016/j.issn.2096-1456.2019.02.005

• Cinical Study • Previous Articles     Next Articles

Comparison of the shaping ability of different nickel-titanium instruments in simulated root canals in resin

ZHANG Xiaowei,LIANG Jingping,SUN Zhe()   

  1. Department of Endodontics, Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology , Shanghai 200011, China
  • Received:2018-04-17 Revised:2018-05-27 Online:2019-02-20 Published:2019-02-21
  • Contact: Zhe SUN E-mail:sunzhe3272@163.com

Abstract:

Objective To compare the shaping ability of 3 different nickel (Ni)-titanium (Ti) systems in simulated root canals in resin and to provide a reference for clinicians.Methods Forty-eight resin blocks were prepared using the F360 (Komet, Brasseler GmbH & Co., Lemgo, Germany) (Group 1), F6 SkyTaper (20/06) (Komet, Brasseler GmbH & Co., Lemgo, Germany) (Group 2), F6 SkyTaper (25/06) (Komet, Brasseler GmbH & Co., Lemgo, Germany) (Group 3) and Reciproc R25 systems (VDW, Munich, Germany) (Group 4) (n=12 canals/group). The images taken before and after preparation were superimposed and analyzed by Adobe Photoshop v7.0. The amount of resin removed by each system was measured, and the centering ability was assessed. The data were statistically analyzed using SPSS 20.0.Results At the 1 mm point, the transportation in Group 4 [(0.10 ± 0.03) mm] was significantly greater than that in Groups 2 [(0.05 ± 0.03) mm] and 3 [(0.05 ± 0.03) mm] (P < 0.05). At the 8 mm and 9 mm points, the transportation values in Group 4 [(0.12 ± 0.06) mm and (0.13 ± 0.05) mm] were significantly higher than those in Groups 2 [(0.05 ± 0.05) mm and (0.05 ± 0.05) mm] and 3 [(0.05 ± 0.04) mm and (0.06 ± 0.05) mm] (P < 0.05). At the 10 mm point, the transportation was significantly greater in Group 4 [(0.13 ± 0.06) mm] than in Group 2 [(0.06 ± 0.06) mm].Conclusion F6 SkyTaper exhibits better centering ability than Reciproc.

Key words: Nickel-titanium instruments, Simulated root canals in resin, Curved root canal, Root canal preparation, Shaping ability

CLC Number: 

  • R781.05

Figure 1

Superimposed images of pre- and postoperative images from the four groups"

Table 1

Centering ability of the four groups n = 12,x ± s,mm"

d(mm) 组1 组2 组3 组4 F P
1 0.07 ± 0.03 0.05 ± 0.031) 0.05 ± 0.031) 0.10 ± 0.03 7.459 < 0.001
2 0.05 ± 0.02 0.05 ± 0.03 0.04 ± 0.03 0.06 ± 0.03 1.172 0.331
3 0.04 ± 0.02 0.03 ± 0.02 0.05 ± 0.04 0.03 ± 0.03 1.597 0.204
4 0.02 ± 0.02 0.04 ± 0.04 0.06 ± 0.05 0.06 ± 0.05 2.566 0.067
5 0.06 ± 0.04 0.06 ± 0.06 0.07 ± 0.04 0.11 ± 0.06 2.502 0.072
6 0.06 ± 0.04 0.07 ± 0.05 0.07 ± 0.06 0.08 ± 0.05 0.224 0.879
7 0.05 ± 0.04 0.05 ± 0.02 0.04 ± 0.03 0.08 ± 0.06 2.849 0.048
8 0.09 ± 0.05 0.05 ± 0.051) 0.05 ± 0.041) 0.12 ± 0.06 5.953 0.002
9 0.10 ± 0.03 0.05 ± 0.051) 0.06 ± 0.051) 0.13 ± 0.05 7.331 <0.001
10 0.11 ± 0.05 0.06 ± 0.061) 0.08 ± 0.05 0.13 ± 0.06 4.157 0.011

Figure 2

Deformations were observed in the F6 SkyTaper groups a: F6 SkyTaper (20/06); b:F6 SkyTaper (25/06)"

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