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Stress Distribution Study Using the Finite Element Method in Three Different Implant-Supported Fixed Complete-Arch
The International Journal of Prosthodontics
|May 6, 2016
Summary
This study analyzed stress in five-implant mandibular prostheses under load. An all-acrylic prosthesis showed the highest stress, indicating a need for metallic bar reinforcement in denture bases.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Finite Element Analysis
Background:
- Mandibular overdentures supported by five implants are a common treatment modality.
- Cantilever components in these prostheses can be susceptible to stress concentrations.
- Understanding stress distribution is crucial for long-term prosthesis survival.
Purpose of the Study:
- To evaluate stress distribution in three-unit cantilevered five-implant mandibular prostheses under simulated loading.
- To compare stress patterns between all-acrylic, metal-acrylic, and metal-ceramic prosthesis designs.
Main Methods:
- Three-dimensional finite element analysis (FEA) was employed.
- Simulations included a temporary all-acrylic prosthesis, a metal-acrylic prosthesis, and a metal-ceramic prosthesis.
- A standardized 100 N load was applied to the cantilever area.
Main Results:
- The all-acrylic prosthesis model exhibited the highest stress values.
- Maximum stress was concentrated on the implant nearest to the cantilever loading point in the all-acrylic model.
- Metal-based prostheses demonstrated more favorable stress distribution.
Conclusions:
- Reinforcement with a metallic bar in the denture base is recommended for five-implant mandibular prostheses.
- Material selection significantly influences stress distribution and implant loading.
- FEA is a valuable tool for predicting mechanical behavior in implant-supported prostheses.
