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The reasons for 2 bones in your lower arm can be to help your hand turn and give you more control over it. The shoulder joint is a ball and socket joint and has large muscles to help control it. Since the movements and actions of a wrist and shoulder are different, different joints were needed. Wrist are more delicate and do a lot different precise task. ...


2

I was going to say no because I was under the impression there was also a component of the fragment sizes in the definition (I'm not a specialist), but in doing a bit of research I appear to be wrong. I was going to say originally it's a seemingly-open leg fracture (both bones), but according to http://orthoinfo.aaos.org/topic.cfm?topic=A00522 it is ...


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