Investigation of Stresses Induced by Different Framework Materials in Implant-Supported Fixed Prosthesis Using Finite...

Area of Science:

• Biomaterials science
• Dental implantology
• Biomechanics

Background:

• Material selection and prosthetic design are critical for stress distribution and load transmission in the implant-prosthesis complex.
• Understanding these factors is essential for long-term implant success and patient outcomes.

Purpose of the Study:

• To compare the stress distribution effects of various prosthetic framework materials in implant-supported fixed prostheses.
• To analyze stress patterns using titanium and zirconia abutments via three-dimensional finite element analysis.

Main Methods:

• Modeled titanium implants with titanium and zirconia abutments.
• Created finite element models with six framework materials and four veneering types.
• Applied vertical and oblique loads to analyze von Mises and tensile stresses in implants, abutments, bone, and superstructures.

Main Results:

• Polyetheretherketone (PEEK) and fiber-reinforced composite (FRC) groups exhibited the highest stresses.
• Monolithic zirconia demonstrated the lowest stress levels across components.
• Fiber-reinforced composite (FRC) and PEEK showed highest cortical bone stress under oblique and vertical loading, respectively.

Conclusions:

• Framework material choice significantly influences stress distribution in implant components, peri-implant bone, and superstructures.
• Materials with lower elastic modulus concentrate higher stresses in surrounding bone and implant structures.
• Monolithic zirconia emerges as a favorable material for minimizing stress accumulation.