New technology is fueling advances in pediatric orthopaedics. Ultrasonography represents a safe and highly accurate method of screening for hip dislocation and dysplasia that is superior to the clinical examination. Image intensification now provides a safe and more anatomically accurate method for the operative treatment of slipped capital femoral epiphysis. Magnetic resonance imaging allows for greater accuracy in the diagnosis of subtle neural abnormalities associated with congenital spinal deformities. Adjuvant chemotherapy and the treatment of osteogenic sarcoma have greatly improved the survival rate and permitted the use of limb-sparing procedures in children.