Hi Angela
My large Ridgeback (approx 50 kg) did this three or four years ago. The vet said they could try to operate but the chances of it working were very low as he is a big dog, and that it was unlikely to be any problem if just left. I decided against putting him through an operation and carried on as usual. He has been absolutely fine, never had a problem with it at all. The nail wears slightly differently but it's not a problem. I even continued to show him successfully, though a couple of judges have mentioned it - I just explain what has happened.
Hope that puts your mind at rest
Best wishes
Carina