That is our unfortunate experience. Quinn got an antler for his birthday last year and was having a fine time chewing it. Not too long afterwards as I was doing a routine toothbrushing, I observed that he had chipped the tips off his upper carnassials, both sides. The chips aren't deep enough to cause a problem but no more antlers for him.
Apache 10-1/2 & Kiya 9 both have worn teeth from years of chewing. I look at Lakota's perfect pearly whites and only hope they stay that way. Poor girl has grown up without tennis balls, only a few marrow bones but a much wiser me.