PHTY304 Lecture Notes - Lecture 5: Microtrauma, Bone Scintigraphy, Stress Fracture
Document Summary
Cause: resulting from repetitive microtrauma/ poor training, where the repetition causes damage to cancellous bone. Repetitive microtrauma cancellous bone fractures in contrast to cortical bone fatigue in adults. Persistent, activity related pain that is reproduced by indirect force to the bone. Sequelae may include leg length discrepancy, angular deformity, joint incongruity or premature plate closure/cessation of growth. Cause: shear/tensile deforming forces through the cartilaginous growth plate. Cartilaginous plate less resistant to shear than ligament or bony cortex therefore mechanical disruption through the plate. Bone scan: these cancellous bone fractures are often imperceptible on radiographs until 6 to 8 weeks after the onset of pain. Joint injuries including ligamentous sprain, internal derangement and chondral injuries. The athlete will typically present with a small effusion and tenderness localized to the lateral knee, along the. Cause: high-energy blow to the medial aspect of an extended knee.
