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Published on: August 30, 2016
Platform switching: biomechanical evaluation using three-dimensional finite element analysis
Lucas Fernando Tabata1, Eduardo Passos Rocha, Valentim Adelino Ricardo Barão
1Department of Dental Materials and Prosthodontics, Univ Estadual Paulista, São Paulo, Brazil.
Summary
Platform switching significantly reduces stress on dental implants and surrounding bone. This technique, along with wider implants, improves biomechanical outcomes, especially under oblique loading conditions.
Area of Science:
- Biomaterials Engineering
- Dental Implantology
- Biomechanics
Background:
- Dental implants are crucial for replacing missing teeth.
- Understanding stress distribution around implants is vital for long-term success.
- Platform-switching is a technique used to improve the fit between implant components.
Purpose of the Study:
- To evaluate stress distribution in peri-implant bone, implants, and prosthetic components.
- To assess the effectiveness of platform-switching in single-implant supported crowns using 3D FEA.
- To compare stress patterns between regular platform, platform-switching, and wide-platform configurations.
Main Methods:
- Three-dimensional finite element models (3D FEA) were created for external-hexagonal implant systems.
- Models simulated three configurations: regular platform (RP), platform-switching (PS), and wide-platform (WP).
- A 100 N occlusal load was applied axially and obliquely using ANSYS software.
Main Results:
- Platform-switching (PS) and increased implant diameter reduced stress in bone and implants compared to RP and WP.
- Cortical bone showed higher stress concentration than trabecular bone under both axial and oblique loading.
- Oblique loading resulted in greater stress intensity and distribution than axial loading.
- Platform switching reduced von Mises, minimum compressive, and maximum tensile principal stresses in peri-implant bone.
Conclusions:
- Platform switching improves biomechanical stress distribution in peri-implant bone tissue.
- Oblique loads generate higher stress concentrations than axial loads.
- Wide-diameter implants significantly reduce stress within the implant system.
