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Comparative Evaluation of Mineral Trioxide Aggregate Obturation Using Four Different Techniques-A Laboratory Study
Abhishek Isaac Mathew1, Silvia Chamin Lee1, Giampiero Rossi-Fedele1
1Adelaide Dental School, University of Adelaide, Adelaide, SA 5000, Australia.
Materials (Basel, Switzerland)
|July 2, 2021
Summary
The Lawaty technique for compacting mineral trioxide aggregate (MTA) in curved root canals resulted in the highest mass and radiopacity. However, this method also required significantly more obturation time compared to other techniques.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Mineral trioxide aggregate (MTA) is a widely used root canal filling material.
- Optimizing MTA compaction in curved canals is crucial for effective obturation.
Purpose of the Study:
- To compare the density and radiopacity of MTA when compacted using different techniques in artificial curved root canals.
- To evaluate the obturation time associated with each compaction method.
Main Methods:
- Forty artificial curved root canals were filled with MTA using four techniques: Lawaty (hand files), gutta-percha (GP) points, auger (NiTi rotary files in reverse), and plugger.
- MTA mass was determined post-setting; radiopacity was assessed via radiographs measuring luminance variations.
- Obturation time was recorded for each technique.
Main Results:
- The Lawaty technique resulted in the highest MTA mass and relative luminance (radiopacity) at all apical levels examined.
- The auger and GP groups showed higher radiopacity than the plugger group in the apical 0.5-2 mm.
- The Lawaty technique required significantly longer obturation time compared to the plugger technique.
Conclusions:
- The Lawaty technique provides superior MTA compaction, leading to increased mass and radiopacity in curved canals.
- Despite its benefits, the Lawaty technique is time-consuming.
- Technique selection for MTA compaction should balance efficacy with clinical time efficiency.
