9021.10.00.50 - Bone plates, screws and nails, and other internal fixation devices or appliances

This HTS category encompasses internal fixation devices used in surgical procedures to stabilize bone fractures or correct deformities. It specifically includes items like bone plates, screws, and nails that are surgically implanted to hold fractured bone segments in place during healing. Appliances such as intramedullary rods and Kirschner wires also fall under this classification when intended for internal bone fixation. The primary purpose is to provide mechanical support and alignment for fractured bones, facilitating proper osteosynthesis.

This subheading is distinguished from its sibling, 9021.10.00.90, which covers "Other" orthopedic or fracture appliances. While this subheading focuses exclusively on devices designed for *internal* bone fixation, the "Other" category would include external fixation devices, casts, braces, and other orthopedic supports that are not surgically implanted. The key differentiator lies in the method of application – internal fixation devices are placed directly within or on the bone, beneath the skin.

As a leaf node, this category does not have further subheadings. Classification within this code requires that the item be specifically designed and intended for the internal surgical fixation of bones, distinguishing it from external medical devices or general surgical hardware.