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Endodontic Retreatment Using a Single Instrument from four Nickel-Titanium Systems - A Micro-CT Study.
Marco Antonio Diniz Azevedo1,2, Thiago Gomes da Silva3, Ângela Fernandes3
1Postgraduate Program in Endodontics, School of Health and Biosciences, PUCPR - Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brazil.
Brazilian Dental Journal
|November 25, 2020
Summary
This study compared single rotary and reciprocating instruments for endodontic retreatment. All systems showed similar effectiveness in removing filling material, though none achieved complete removal.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Endodontic retreatment aims to remove obturation materials and clean the root canal system.
- Rotary and reciprocating single-file systems offer potential advantages in efficiency and simplicity for retreatment.
Purpose of the Study:
- To evaluate and compare the efficiency of single rotary instruments (ProTaper Next, ProTaper Gold, TRUShape 3D) versus a single reciprocating instrument (WaveOne) for endodontic retreatment using micro-computed tomography (micro-CT).
Main Methods:
- Sixty prepared and obturated canine teeth were retreated using a single size 40 instrument from four different systems.
- Micro-CT was employed to assess the volume of initial and residual filling material and dentin removal.
- Time to remove filling material was recorded, and data were statistically analyzed.
Main Results:
- No significant differences were found in the amount of dentin removed or the percentage of filling material remaining among the four groups.
- TRUShape 3D instruments required the longest time for retreatment compared to WaveOne and ProTaper Gold.
- All tested instruments were unable to completely remove the filling materials.
Conclusions:
- Single rotary instruments from ProTaper Gold, TRUShape 3D, and ProTaper Next systems demonstrated comparable effectiveness to the WaveOne reciprocating system in endodontic retreatment.
- None of the evaluated single-instrument systems achieved complete removal of root canal filling materials.
