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Effect of reinforcement on overdenture strain
1Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan.
Journal of Dental Research
|June 26, 2007
Summary
Reinforcing overdentures with cast metal significantly reduces strain, preventing deformation and fracture. This simple method enhances the durability of dental prosthetics.
Area of Science:
- Biomaterials Science
- Dental Prosthodontics
- Mechanical Engineering
Background:
- Overdentures are prone to fracture due to their thin denture base and the abutment acting as a fulcrum.
- Identifying effective reinforcement strategies is crucial for improving overdenture longevity and function.
Purpose of the Study:
- To investigate the impact of various reinforcements on reducing strain within an overdenture.
- To determine if rational reinforcement can prevent deformation and fracture of the overdenture.
Main Methods:
- A mandibular edentulous model with artificial mucosa and canine abutments was created.
- Strain gauges measured overdenture strain under a 49 N vertical load at the canine position and midline.
- Different reinforcement types were tested, focusing on cast metal reinforcement covering the midline and coping top.
Main Results:
- Cast metal reinforcement covering both the midline and coping top significantly reduced overdenture strain.
- This specific reinforcement demonstrated superior effectiveness compared to other tested methods.
Conclusions:
- Rational reinforcement, particularly with cast metal, is effective in mitigating strain in overdentures.
- This approach offers a simple yet potent solution for preventing overdenture deformation and fracture, enhancing prosthetic durability.
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