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
*Anatomical terminology*

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.

References

Dimeglio, A (2001). "Growth in Pediatric Orthopaedics". J Pediatr Orthop. 21 (4): 549–555. PMID 11433174.

See also

Bones of the pelvis

General

arcuate line

gluteal lines	posterior anterior inferior
iliac spines	anterior superior anterior inferior posterior superior posterior inferior
other:	crest tuberosity tubercle fossa

body	ischial spine lesser sciatic notch
superior ramus	tuberosity of the ischium
inferior ramus	no substructures

body	pubic crest
superior ramus	pubic tubercle obturator crest
inferior ramus	pectineal line

Compound

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