Journal of Prevention and Treatment for Stomatological Diseases ›› 2019, Vol. 27 ›› Issue (3): 167-171.doi: 10.12016/j.issn.2096-1456.2019.03.005

• Cinical Study • Previous Articles     Next Articles

A comparison of the effect of different nickel-titanium instruments combined with ultrasonic irrigation on root canal preparation

ZHANG Xiaowei,LIANG Jingping(),RAN Shujun   

  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:2018-07-10 Revised:2018-09-21 Online:2019-03-20 Published:2019-03-20
  • Contact: Jingping LIANG E-mail:liangjpdentist@126.com

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Abstract:

Objective To compare the removal efficiency and the amounts of apically extruded debris using Twisted File (TF), Twisted File Adaptive (TFA), ProTaper, and ProTaper Next combined with ultrasonic irrigation and to provide an experimental basis for the selection of root canal instrumentation in the clinic.Methods Forty mandibular premolars were randomly divided into 4 groups (n=10 teeth per group). The canals were cut using a Twisted File, Twisted File Adaptive, ProTaper, or ProTaper Next nickel-titanium instrument. The canals were irrigated with ultrasonic irrigation. The apically extruded debris were collected in preweighted Eppendorf tubes. The amount of dental tissue removed and extruded debris were assessed with an electronic balance.Results The amount of tooth tissue removed in groups A, B, C and D was 20.5 ± 2.0 mg, 17.8 ± 4.2 mg, 20.8 ± 3.9 mg and 16.5 ± 2.2 mg, respectively. Combined with ultrasonic irrigation, the Twisted File and ProTaper had a better removal efficiency than the ProTaper Next(P < 0.05). There was no significant difference in the amount of extruded debris (χ2=4.057, P=0.255) among four groups.Conclusion The Twisted File and ProTaper had a better removal efficiency than the ProTaper Next combined with ultrasonic irrigation. There was no significant difference in the amount of extruded debris using four Nickel-titanium instruments combined with ultrasonic irrigation.

Key words: Nickel-titanium instruments, ProTaper, Twisted File, Ultrasonic irrigation, Root canal treatment, Dentin, Apical extrusion

CLC Number: 

  • R781.05

Figure 1

A device for collecting extruded debris"

Table 1

The cutting dentin of each group x ± s,mg"

组别 组别 n x ± s
A组（TF预备 + 超声荡洗） A组 10 20.5 ± 2.0
B组（TFA预备 + 超声荡洗） B组 10 17.8 ± 4.2
C组（ProTaper预备 + 超声荡洗） C组 10 20.8 ± 3.9
D组（ProTaper Next预备 + 超声荡洗） D组 10 16.5 ± 2.2

Figure 2

The collected debris in Eppendorf tubes"

Table 2

The extruded debris of each group x ± s,mg"

组别 样本数 x ± s
A组（TF预备 + 超声荡洗） 10 0.3 ± 0.3
B组（TFA预备 + 超声荡洗） 10 0.2 ± 0.2
C组（ProTaper预备 + 超声荡洗） 10 0.4 ± 0.4
D组（ProTaper Next预备 + 超声荡洗） 10 0.1 ± 0.1
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