Triradiate cartilage

The triradiate cartilage (in Latin cartilago ypsiloformis) is the Y-shaped epiphyseal plate between the ilium, ischium and pubis to form the acetabulum of the os coxae.

Triradiate cartilage
The acetabulum
TA2	1859
Anatomical terminology [edit on Wikidata]

Human development

In children, the triradiate cartilage closes at an approximate bone age of 12 years for girls and 14 years for boys.^[1]

Clinical use

Evaluating the position of the triradiate cartilage on an AP radiograph of the pelvis with both Perkin's line and Hilgenreiner's line can help establish a diagnosis of developmental dysplasia of the hip.