difference between external and internal fixation
Medical Device Testing: Internal Fixation vs. External Fixation. External fixation is a surgical treatment used to set bone fractures in which a cast would not allow proper alignment of the fracture. An example of a standard test for external fixation is ASTM F1541. Internal fixation involves the surgical implementation of implants for the purpose of repairing a bone. Traditionally an internal fixator would be made of stainless steel or titanium, but now bioabsorbable bone screws, acrylic bone screws, and other composite materials are coming into the market.