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Vertical Load Induced with Twisted File Adaptive System during Canal Shaping.
Ahmed Jamleh1, Khalid Alfouzan1
1Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia; King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia.
Journal of Endodontics
|November 23, 2016
Summary
The Twisted File Adaptive (TFA) system generated the lowest vertical loads during root canal shaping compared to other systems. TFA and Twisted File (TF) showed significantly lower coronal loads than ProTaper Next (PTN) and ProTaper Universal (PTU).
Area of Science:
- Endodontics
- Dental Materials Science
- Biomechanical Engineering
Background:
- Root canal shaping involves applying vertical loads, which can impact procedural safety and outcomes.
- Different rotary instrument systems may induce varying levels of vertical forces during canal preparation.
Purpose of the Study:
- To compare the vertical loads generated by the Twisted File Adaptive (TFA) system against Twisted File (TF), ProTaper Next (PTN), and ProTaper Universal (PTU) systems during root canal shaping.
Main Methods:
- Fifty-two extracted teeth underwent root canal shaping using TFA, TF, PTN, or PTU systems (13 per system).
- Vertical loads (apically and coronally directed) were recorded during shaping.
- Peak loads at three instrumentation stages were statistically analyzed using Kruskal-Wallis and Mann-Whitney tests.
Main Results:
- Vertical peak loads ranged from 0.84-7.55 N (apical) and 2.16-2.79 N (coronal) across systems.
- Significant differences in peak loads were observed among systems at each stage.
- TFA exhibited the lowest apically directed peak loads; TFA and TF showed significantly lower coronally directed loads than PTN and PTU.
Conclusions:
- Instrument system choice influences the vertical loads during root canal shaping.
- TFA instruments were associated with the lowest peak loads, followed by TF, PTN, and PTU, indicating a potentially more favorable biomechanical profile.
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