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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
Published on: April 8, 2020
An engineering analysis of dental occlusion principles
1Department of Orthodontics and Oral Facial Genetics, School of Dentistry, Indiana University, Indianapolis, IN 46202-5186, USA. tkatona@iupui.edu
This study developed an engineering model for tooth contacts, revealing that desired tooth loading can cause undesirable opposing tooth loading. Controlling tooth forces via occlusal equilibration is complex and requires considering the center of resistance.
Area of Science:
- Biomechanical Engineering
- Dental Mechanics
- Biophysics
Background:
- Traditional concepts of occlusion and tooth loading are widely accepted.
- However, the mechanical principles governing these interactions require further analytical investigation.
Purpose of the Study:
- To develop an analytical engineering model of contacting teeth.
- To analyze occlusal contact interactions and tooth loading (forces and moments).
- To critique established occlusion-related principles.
Main Methods:
- Constructed free-body diagrams for two occluding teeth.
- Derived equilibrium equations using the center of resistance concept.
- Solved for forces and moments, analyzing tripod and cusp-fossa schemes.
Main Results:
- Demonstrated that specific tooth loads result in predictable opposing tooth loads.
- Showcased how occlusal schemes influence computed crown-crown contact forces.
- Quantified the relationship between applied loads and resultant forces.
Conclusions:
- Engineering analysis reveals flaws in common notions of occlusal mechanics.
- Clinically desirable loading can lead to undesirable opposing tooth loading.
- Controlling tooth loading with occlusal equilibration is challenging due to complex interactions; center of resistance is crucial.
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