As far as I know their only use is in the making of and improving Dragon Armor. In my 200+ hr game time that's all I've seen them used for. If you don't plan on using them just sell 'em.

Ok thanks. I always made an annoying effort to go out of my way to head to my current main house and store the bones. Which really svcks when you're not using fast travel

So now that I see they have no use for, I'll sell them. And to the guy who said keep them as mementos to dead dragons, I'll probably do that when I'm not hurting for cash. Since this guy is fairly new I'm still in need of money to buy and upgraded houses and to purchases horses and other useful stuff. Thanks guys.