I did a search and it didn't turn up anything. This is an odd question but I don't think broken collarbone is all that un-common in the population, so perhaps some paddlers had dealt with it also and can offer some insight.
I broke my collarbone in a bike crash. The break is displaced. Discussion with doctors and on bike forums indicates many just let the bone heal as is. But that result in a slight change in shoulder geometry.
Commonly mentioned as "you'll feel a bump on the should". But it's actually a bit more than just a bump. Because the bones are not growing back straight as before the break, it may result in a slightly lop-sided shoulder, sometimes significant enough to be noticeable by naked eye.
Naturally, I'm concern how it might affect my paddling and rolling.
Long term results I heard range from "full should function" to "some lose of range of motion" and "some lose of strength". But how much the "some" is isn't clear. This is mostly from non-paddlers who may or may not demand as much of their shoulder functions. So I like to see if there're paddlers who were unfortunate enough to have gone through that to offer some sampling?
There's the option to have a surgery to put a plate in to connect the broke bone so they grow back the same way as before. But all surgery carries with its own risk. So I'd like to be as informed as possible when making that decision.