Numerical simulations of human tibia osteosynthesis using modular plates based on Nitinol staples.

Area of Science:

• Biomedical Engineering
• Materials Science
• Orthopedic Surgery

Background:

• Shape memory alloys, particularly Nickel-Titanium (NiTi), offer unique properties like superelasticity and biocompatibility.
• These properties make NiTi alloys highly suitable for biomedical applications, especially in orthopedics and orthodontics.
• Current osteosynthesis methods require improved implant designs for better fracture healing and patient outcomes.

Purpose of the Study:

• To present novel modular plates for long bone fracture fixation.
• To investigate the use of Nitinol (NiTi) staples as connecting elements in modular osteosynthesis plates.
• To evaluate the mechanical performance of these modular plates in simulated fractured long bones.

Main Methods:

• Development of modular plates using interchangeable titanium or stainless steel modules and Nitinol U-shaped staples.
• Creation of three-dimensional virtual models of the tibia bone and modular plates using computed tomography (CT) images and SolidWorks.
• Generation of finite element models for numerical simulation using Visual Nastran software.

Main Results:

• Successful generation of 3D virtual and finite element models for simulation.
• Acquisition of displacement and von Mises strain diagrams for the modular plate and the fractured tibia-plate construct.
• Demonstration of the feasibility of using modular plates with Nitinol components for osteosynthesis.

Conclusions:

• The proposed modular plates with Nitinol staples represent a viable advancement in osteosynthesis.
• The study highlights the potential of combining different materials to optimize implant performance in orthopedic applications.
• Further research and clinical validation are warranted to confirm the efficacy of these modular implants in treating long bone fractures.