Related Experiment Video
Updated: Apr 25, 2026
03:07
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
Published on: October 11, 2024
472
Comparative Analysis of Surface Roughness and Plastic Deformation of Reciprocating Instruments after Clinical Use
Ángel Herrera1, Magdalena Azabal2, Jesús R Jimenez-Octavio3
1Department of Conservative and Prosthetic Dentistry, School of Dentistry, Complutense University, 28040 Madrid, Spain.
Materials (Basel, Switzerland)
|August 29, 2024
Summary
EdgeOne Fire (EO) instruments showed significantly more plastic deformation and increased surface roughness after single use compared to WaveOne Gold (WOG) instruments. No fractures occurred in either reciprocating file type.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials Engineering
Background:
- Reciprocating instruments are widely used in endodontic therapy for root canal preparation.
- Understanding the mechanical behavior and surface changes of these instruments after use is crucial for clinical safety and efficacy.
- Previous research has focused on cyclic fatigue, but plastic deformation and surface topography changes require further investigation.
Purpose of the Study:
- To compare the surface topography and plastic deformation (PD) of new and used WaveOne Gold (WOG) and EdgeOne Fire (EO) reciprocating instruments.
- To evaluate the impact of single-use on the structural integrity and surface characteristics of these endodontic files.
Main Methods:
- Twenty-six WOG and EO instruments were divided into new (control) and used (experimental) groups.
- Instruments were photographed under magnification, and used instruments were evaluated after shaping a single molar root canal.
- Plastic deformation was assessed by blinded examiners, and surface roughness was analyzed using 3D profilometry.
Main Results:
- No instrument fractures were observed in either group.
- EdgeOne Fire instruments exhibited significantly higher rates of plastic deformation compared to WaveOne Gold instruments (p < 0.001).
- EO instruments also showed significantly increased surface roughness across most parameters after single use compared to WOG instruments (p < 0.05).
Conclusions:
- Single use of EdgeOne Fire reciprocating instruments is associated with a substantially higher risk of plastic deformation and increased surface roughness than WaveOne Gold instruments.
- These findings suggest potential differences in the material properties and clinical performance between the two reciprocating file systems.
- Further research is warranted to explore the long-term implications of these observed changes on instrument longevity and endodontic treatment outcomes.
