A big strong raw bone is great for keeping teeth clean, the anal glands emptied (it helps push the poo through) and the dog occupied. As above, no poultry bones, but either a knuckle or marrow bone won't splinter.
Although I am not an advocate of the raw and meaty bones feeding method, mine get them regularly and have done for over thirty years, and I also occasionally give them cooked knuckle or marrow bones.
I had a litter of puppies in 2003, and they had a large knuckle bone (which we call a postman's leg) from the age of three weeks. They kept going back to gnaw on it, and I eventually threw it out about three months ago - it had been around all that time and they often went and had a chew on it, as did the older dogs. It was totally devoid of any meaty or gristly bits of course by then, but the actual bone still gave them hours of pleasure.