The trochanteric anastomosis 1 forms part of the blood supply of the femoral head along with the cruciate anastomosis and the ligamentum teres.
The medial circumflex femoral artery and the lateral circumflex femoral artery form a ring around the femoral neck. The ascending branches of these two arteries then form an anastomosis with the descending branch of the superior gluteal artery (from the posterior division of the internal iliac artery).
Damage to these blood vessels, either from direct trauma or other causes (e.g. long-term steroids, chronic alcohol use, among others) can result in avascular necrosis of the femoral head.
Summary
- arteries:
- ascending branches of medial and lateral circumflex arteries
- descending branch of the superior gluteal artery
- supplies:
- femoral head and neck
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