Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments
Abstract
:1. Introduction
2. Materials and Methods
2.1. Sample Size Estimation
2.2. Root Canal Instrumentation
2.3. Force and Torque Analysis
2.4. Canal Centering Ratio
2.5. Statistical Analysis
3. Results
3.1. Force and Torque Analysis
3.2. Canal Centering Ratio
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Level from Apex (mm) | Instrument | Rotational Mode | |||
---|---|---|---|---|---|
R150/30 | R240/120 | OTR | CR | ||
0 | PTU | 0.31 ± 0.10 ac,A | 0.17 ± 0.09 b,A | 0.22 ± 0.07 bc,A | 0.34 ± 0.07 a,A |
PTG | 0.15 ± 0.06 a,B | 0.17 ± 0.06 a,A | 0.18 ± 0.08 a,A | 0.22 ± 0.09 a,B | |
0.5 | PTU | 0.21 ± 0.07 a,A | 0.15 ± 0.06 a,A | 0.21± 0.10 a,A | 0.20 ± 0.06 a,A |
PTG | 0.09 ± 0.05 a,B | 0.13 ± 0.07 a,A | 0.14 ± 0.05 a,B | 0.17 ± 0.05 a,A | |
1 | PTU | 0.23 ± 0.08 a,A | 0.15 ± 0.07 a,A | 0.17 ± 0.07 a,A | 0.20 ± 0.05 a,A |
PTG | 0.10 ± 0.04 a,B | 0.14 ± 0.06 a,A | 0.16 ± 0.06 a,A | 0.17 ± 0.06 a,A | |
2 | PTU | 0.20 ± 0.06 a,A | 0.19 ± 0.07 a,A | 0.18 ± 0.09 a,A | 0.24 ± 0.04 a,A |
PTG | 0.13 ± 0.03 a,B | 0.12 ± 0.04 a,B | 0.16 ± 0.08 a,A | 0.17 ± 0.05 a,B | |
3 | PTU | 0.11 ± 0.08 a,A | 0.10 ± 0.06 a,A | 0.13 ± 0.06 a,A | 0.09 ± 0.05 a,A |
PTG | 0.03 ± 0.01 a,A | 0.04 ± 0.03 a,A | 0.04 ± 0.02 a,B | 0.06 ± 0.03 a,A |
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Omori, S.; Ebihara, A.; Hirano, K.; Kasuga, Y.; Unno, H.; Nakatsukasa, T.; Kimura, S.; Maki, K.; Hanawa, T.; Okiji, T. Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments. Materials 2022, 15, 6850. https://doi.org/10.3390/ma15196850
Omori S, Ebihara A, Hirano K, Kasuga Y, Unno H, Nakatsukasa T, Kimura S, Maki K, Hanawa T, Okiji T. Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments. Materials. 2022; 15(19):6850. https://doi.org/10.3390/ma15196850
Chicago/Turabian StyleOmori, Satoshi, Arata Ebihara, Keiko Hirano, Yuka Kasuga, Hayate Unno, Taro Nakatsukasa, Shunsuke Kimura, Keiichiro Maki, Takao Hanawa, and Takashi Okiji. 2022. "Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments" Materials 15, no. 19: 6850. https://doi.org/10.3390/ma15196850