Same with clavicle fractures, I shattered mine and they used to immediately plate and pin it back in place, but I was given a sling and 7 weeks latter it had pulled it's myriad pieces back together without surgery .

The doctor said had he got that result from an operation operation he would have been thrilled.

Worth noting my hospital is a learning hospital, so it was a hot debate topic amongst the doctors and most of them were surprised they hadn't operated.