UMEM Educational Pearls

Title: Boxer's (Metacarpal Neck) Fractures

Keywords: metacarpal, neck, fracture (PubMed Search)

Posted: 12/29/2012 by Michael Bond, MD
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Metacarpal Neck Fractures (i.e.: Boxer’s Fracture if 5^th Metacarpal)

Depending on the MCP joint involved a certain amount of angulation is permissible before it adversely affects normal function.

2^nd and 3^rd Metacarpal fractures < 10۫ angulation ideally these should be perfectly aligned.
4^th Metacarpal fracture <20۫ angulation allowed
5^th Metacarpal fracture <30۫ angulation.
- Studies have shown that even 30۫ angulation will decrease normal function by 20%.
- Normal excursion of the 5^th MCP is 15۫ to 25۫.
No amount of rotation deformity should be allowed.

Wishing everybody a Happy and Healthy New Year.