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[Three-dimensional finite element analysis of different framework materials in implant-supported fixed mandibular
1Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan 250012, China.
Zirconia and metal frameworks offer superior stress distribution in implant-supported fixed mandibular prostheses compared to polyether ether ketone (PEEK). This biomechanical analysis highlights material choice for enhanced implant and bone health.
Area of Science:
- Biomaterials Engineering
- Dental Implantology
- Biomechanics
Background:
- Fixed implant-supported prostheses are crucial for restoring mandibular function.
- Material selection for prosthesis frameworks significantly impacts biomechanical outcomes.
- Understanding stress distribution is key to long-term implant success.
Purpose of the Study:
- To compare the biomechanical performance of various framework materials for implant-supported fixed mandibular prostheses.
- To evaluate stress distribution on implants and surrounding bone under oblique loading.
- To identify optimal materials for enhanced prosthetic stability and longevity.
Main Methods:
- Three-dimensional finite element analysis of an implant-supported fixed mandibular prosthesis model.
- Simulation of six framework materials: pure titanium, cobalt-chromium alloy, gold alloy, zirconia, PEEK, and carbon fiber-reinforced PEEK.
- Application of a 300 N oblique load at a 75° angle to simulate functional forces.
Main Results:
- Highest stresses concentrated around implant necks and cortical bone, particularly in the posterior region.
- Zirconia and metal frameworks exhibited lower stress values on implants and bone compared to PEEK.
- Zirconia demonstrated the most favorable stress distribution, followed by metal alloys, then PEEK materials.
Conclusions:
- Zirconia and metal framework materials provide superior biomechanical advantages for implant-supported fixed mandibular prostheses.
- These materials promote better stress distribution, potentially reducing the risk of implant failure and bone resorption.
- PEEK-based materials may present higher stress concentrations, necessitating careful consideration in clinical applications.
