Effectiveness of Nickel–Titanium Files for Retreatment of Molars Filled with Single-Cone Hydraulic Technique Using Bioceramic Sealers: An In Vitro Study
Abstract
:1. Introduction
2. Materials and Methods
2.1. Selection of Teeth
2.2. Root Canal Preparation and Obturation
2.3. Endodontic Retreatment and Group Designation
2.4. Scanning Electron Microscope (SEM) Evaluation
2.5. Statistical Analysis
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
Retx | retreatment |
GP | gutta-percha |
BCSs | bioceramic root canal sealers |
NiTi | nickel–titanium |
PTG | ProTaper Gold |
ERS | Endo ReStart |
XPD | XP Endo 3D Shaper |
HFR | HyFlex Remover |
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Group | Step 1: Coronal Penetration | rpm, Ncm | Step 2: Obturation Material Removal | rpm, Ncm |
---|---|---|---|---|
PTG | ProTaper Universal Retreatment, D3 (#20/0.07) | 700, 3 | ProTaper Gold, S1 (#18/0.02–0.11) | 700, 3 |
ERS | Endo ReStart Opener (#30/0.10) | 700, 2.5 | Endo ReStart (#25/0.05) | 700, 2.5 |
XPD | ProTaper Universal Retreatment, D3 (#20/0.07) | 700, 3 | XP-3D Shaper (#30/0.02–0.08) | 1200, 3 |
HFR | HyFlex EDM Orifice Opener (#25/0.12) | 700, 2.5 | HyFlex Remover (#30/0.07) | 700, 2.5 |
Frequency of Mechanical Alterations | |||
---|---|---|---|
Group (n = 22) | Reverse Winding | Microcrack | Broken Tip |
PTG | 10 | 4 | 9 |
ERS | 1 | 1 | 1 |
XPD | 6 | 0 | 0 |
HFR | 5 | 0 | 0 |
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Lee, J.; Kim, H.-C.; Kirkpatrick, T.; Jaramillo, D.E.; Kwak, S.W.; Jeong, J.W. Effectiveness of Nickel–Titanium Files for Retreatment of Molars Filled with Single-Cone Hydraulic Technique Using Bioceramic Sealers: An In Vitro Study. Materials 2025, 18, 1265. https://doi.org/10.3390/ma18061265
Lee J, Kim H-C, Kirkpatrick T, Jaramillo DE, Kwak SW, Jeong JW. Effectiveness of Nickel–Titanium Files for Retreatment of Molars Filled with Single-Cone Hydraulic Technique Using Bioceramic Sealers: An In Vitro Study. Materials. 2025; 18(6):1265. https://doi.org/10.3390/ma18061265
Chicago/Turabian StyleLee, Jane, Hyeon-Cheol Kim, Timothy Kirkpatrick, David E. Jaramillo, Sang Won Kwak, and Ji Wook Jeong. 2025. "Effectiveness of Nickel–Titanium Files for Retreatment of Molars Filled with Single-Cone Hydraulic Technique Using Bioceramic Sealers: An In Vitro Study" Materials 18, no. 6: 1265. https://doi.org/10.3390/ma18061265
APA StyleLee, J., Kim, H.-C., Kirkpatrick, T., Jaramillo, D. E., Kwak, S. W., & Jeong, J. W. (2025). Effectiveness of Nickel–Titanium Files for Retreatment of Molars Filled with Single-Cone Hydraulic Technique Using Bioceramic Sealers: An In Vitro Study. Materials, 18(6), 1265. https://doi.org/10.3390/ma18061265