Interlocking Nailing Femur

Introduction: X-Linked Hypophosphatemic Rickets (XLHR) occurs due to mutations in PHEX gene leading to a disordered production of FGF23 and hypophosphatemia. This disease is characterized by bowing of lower extremities. Phosphate supplements and oral vitamin medications, partially or, in some cases, fully restore the straightness of the limbs. Surgery is considered a vital alternative for severe or residual limb deformities in adolescent population. Case Report: A 19 year old male presented to us with complaints of bilateral bowing of lower extremities, diagnosed to be X-Linked Hypophosphatemic Rickets .He underwent correction of deformity in both femurs, spaced 5 months apart, with intramedullary nailing, based on the principle of CORA. Follow-up period of 3 years showed a good functional outcome from the patient with no complications acquired so far. Patient gained a height of 5 cms. Discussion: The treatment for XLHR, principally, starts with rectifying hypophosphatemia and, is Case Study

An orthopedic distractor device is currently being developed
for extending bones or bridging a gap in a bone. The device is designed to fit into the medullary canal of a human femur or tibia. By virtue of telescopic motion between two mating parts, the device can extend axially inside a dissected bone, elongate it to desired length. The distractor is actuated by means of a miniature electrical drive system, which is energized and controlled from outside of the body without any direct physical connection or cabling. In this study mechanical design and prototype manufacturing considerations of the intramedullary distractor device are
discussed. An important limitation in design of this device is
the availability of a suitable drive system that will fit into the
intramedullary space of the bone, which has a diameter of less
then 12 mm. The nail must withstand axial forces with a magnitude of 2000 N, which is exerted by extending the muscles, especially during the late stages of the distraction operation. Since the designed device is intended to be used inside the human body,