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Stresses in mandibular cortical bone during mastication: biomechanical considerations using a three-dimensional
Masayuki Hirabayashi1, Mitsuru Motoyoshi, Toko Ishimaru
1Department of Orthodontics, Nihon University School of Dentistry, Tokyo, Japan. hirabayashi@dent.nihon-u.ac.jp
Journal of Oral Science
|June 13, 2002
Summary
This study used a 3D model to analyze biting forces on lower jaw bone. Results suggest a link between chewing force and mandibular bone thickness, indicating potential bone hypertrophy.
Area of Science:
- Biomechanical analysis of mastication.
- Dental biomechanics and bone remodeling.
Background:
- Masticatory forces impact mandibular bone structure.
- Understanding these forces is crucial for dental health.
Purpose of the Study:
- To investigate biomechanical aspects of biting force on mandibular bone.
- To analyze stress distribution in the lower first molar area during mastication.
Main Methods:
- Constructed a 3D finite element model (FEM) of the lower first molar, including tooth, periodontal ligament (PDL), alveolar bone, and cortical bone.
- Utilized computed tomogram (CT) images for model accuracy.
- Applied simulated masticatory biting forces to the model for analysis.
Main Results:
- Compressive stress of 0.3-7.9 MPa was observed on the cortical bone during simulated mastication.
- Stress distribution patterns in the model correlated with areas of significant cortical bone thickening found in morphological studies.
- Identified stress concentration at the linguo-superior margin, basal area, and bucco-medial area of the mandible.
Conclusions:
- A potential relationship exists between masticatory forces and cortical bone hypertrophy.
- The findings support the hypothesis that mechanical stress influences mandibular bone morphology.
- Further research is needed to explore various factors influencing this relationship.