intramedullary_nails

Intramedullary nails

Orthopedic nails for intramedullary fixation

Orthopedic nails are intramedullary implants used in long bone, minimally invasive reconstruction surgeries for fixing bone fractures resulting from trauma or osteoporosis.

Most orthopedic nail systems use bolts to “lock” the nail into position on both ends of the fracture. Advanced intramedullary fixation systems use expandable nails that do not require interlocking screws. The orthopedic surgeon inserts the nail in its reduced form through the medullary canal and pushes it into position. Then, the surgeon pumps saline solution into the hermetically sealed nail. As the liquid pressure increases, the nail expands to the desired diameter in a controlled manner.

STI provides laser welding services for assembling intramedullary nails from various metal components, including mix metal welding of hardened bars on annealed tubes, laser seam welding of both the distal tip and the proximal end. Quality assurance procedures include pressure, sealing and leakage tests to verify hermetic sealing and metallographic cross section analysis to inspect welding quality. Electropolish process, optimized for stainless steel and the specific product requirements, provides a shiny surface finish and improves biocompatibility and corrosion resistance.