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Occlusal Loading Effect on Stress Distribution of Endodontically Treated Teeth: Finite Element Analysis Study.
M M Wendling1, G Mantovani2, B V Fernandes1
1Department of Dentistry, Ponta Grossa Dental School, State University of Ponta Grossa (UEPG), Ponta Grossa, Paraná 8403090, Brazil.
The European Journal of Prosthodontics and Restorative Dentistry
|October 9, 2023
Summary
Occlusal loading angulation significantly impacts stress distribution in endodontically treated teeth. However, varying file sizes and tapers during root canal preparation did not substantially alter maximum stress areas.
Area of Science:
- Biomaterials and Biomechanics
- Dental Mechanics
- Endodontics
Background:
- Endodontically treated teeth require careful consideration regarding occlusal forces.
- Root canal preparation techniques can influence tooth biomechanics.
- Finite element analysis is a valuable tool for simulating stress distribution.
Purpose of the Study:
- To evaluate how occlusal loading affects stress distribution in endodontically treated teeth.
- To analyze the impact of different file sizes and tapers used in root canal preparation.
- To utilize finite element analysis for this biomechanical investigation.
Main Methods:
- Developed seven 3D models of a lower second premolar (one healthy, six endodontically treated).
- Simulated root canal preparations using file configurations with varying sizes and tapers (30/.05, 30/.09, 35/.04, 35/.06, 40/.04, 40/.06).
- Applied occlusal loads (30N, 90N, 270N) at different angles (90°, 45°, 20°) to simulate various loading conditions.
Main Results:
- Higher stress values were observed under 45° loading.
- Occlusion and laterality simulations localized maximum stress on the inner root curvature.
- Occlusal interference simulations placed maximum stress on the lingual surface along the tooth's long axis.
Conclusions:
- The angulation and magnitude of occlusal loading are critical factors in stress distribution.
- Variations in file size and taper during root canal preparation did not significantly increase maximum stress areas.
- Understanding these biomechanical responses is crucial for optimizing endodontic treatment outcomes.
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