Bone Biology
A 12-year-old boy sustains a fall on his outstretched hand. Radiographs show a Salter-Harris II fracture of the distal radius with 20 degrees of dorsal angulation. His physis appears intact on the metaphyseal fragment side. The parents are concerned about growth disturbance. Regarding growth plate physiology:
Mark each as TRUE or FALSE
The physis has four histological zones (from epiphysis to metaphysis): Reserve/Resting (stores nutri...
Blood supply to the physis: the epiphysis supplies the reserve and proliferative zones (growth depen...
The proliferative zone is the weakest mechanically and is where most fractures occur; metaphyseal bl...
Salter-Harris classification: Type I (through physis), Type II (through physis and metaphysis - most...
Growth arrest occurs when a physeal bar (bone bridge) forms across the physis; risk factors include ...
Answer the questions to see explanations
Click T (True) or F (False) for each option