FDM Medical 3D Printing Sterilization Study
Review a technical study on how selected FDM 3D printed medical parts respond to common sterilization methods, including autoclave, ethylene oxide, hydrogen peroxide plasma, and gamma radiation.
Key Takeaways
- Nine FDM thermoplastic materials were tested against four sterilization methods: autoclave, ethylene oxide gas, hydrogen peroxide gas plasma, and gamma radiation.
- Sterility testing used Tryptic Soy Broth incubation over 14 days to check whether microorganisms remained after sterilization.
- Material response varied by method, with autoclave heat and moisture causing visible damage in several ABS-derived materials.
Executive Summary
This whitepaper summarizes a sterilization study for FDM-manufactured parts intended for medical use. It examines whether common FDM thermoplastics can be sterilized using autoclave, ethylene oxide gas, hydrogen peroxide gas plasma, and gamma radiation methods.
The study covers nine FDM materials and describes the test setup, sterilization cycles, sterility checks, and visible material changes after processing. It is especially useful for teams assessing material and sterilization route compatibility before considering FDM parts for medical tools, devices, models, or adjacent healthcare applications.
The findings show that sterilization success and material stability are separate questions. While the tested methods were broadly effective at sterilizing samples, the paper highlights deformation risks from autoclaving, particularly for ABS-derived materials, and recommends considering heat-resistant materials for high-temperature sterilization routes.