[Progress in biocompatibility and surface modification of nickel titanium shape memory alloys]

Area of Science:

• Biomaterials Science
• Materials Engineering
• Medical Device Technology

Background:

• Nickel titanium shape memory alloys (Ni-Ti SMA) are increasingly utilized in clinical settings as internal fixation devices.
• Their application is driven by advantageous properties such as super-elasticity, shape memory effect, wear resistance, and corrosion resistance.
• Ni-Ti SMA can mitigate issues like internal fixator rupture caused by stress shielding.

Purpose of the Study:

• To review and summarize the research advancements in the biocompatibility and surface modification of Ni-Ti SMA.
• To provide an overview of the current state of Ni-Ti SMA in internal fixation applications.

Main Methods:

• A comprehensive review of domestic and international research on Ni-Ti SMA was conducted.
• Researches were collated, analyzed, and synthesized to identify key findings and trends.

Main Results:

• Ni-Ti SMA exhibits excellent material properties making it suitable for long-term internal fixation.
• Surface modification techniques have demonstrated an improvement in the biocompatibility of Ni-Ti SMA.
• The alloy's characteristics help prevent internal fixator failure due to stress shielding.

Conclusions:

• Ni-Ti SMA is a highly promising material for developing advanced long-term internal fixators.
• Further research into surface modification can optimize Ni-Ti SMA for enhanced clinical performance and biocompatibility.