The mnemonic
MAIN
What each word stands for
- MMalunion
- AAvascular necrosis
- IInfection (osteomyelitis)
- NNon-union
Why it matters clinically
Guides follow-up after fracture healing, especially in scaphoid, femoral neck and talus fractures.
Where it stops being reliable
Misses stiffness, myositis ossificans, complex regional pain syndrome and post-traumatic arthritis.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.