eburnation

1. "eburnation:Degeneration of bone into a hard, ivorylike mass, as that which occurs at the articular surfaces of bones in osteoarthritis."

"骨质象牙化:骨质变质为坚硬的象牙状的块体,类似于患骨节炎时骨关节表面出现的情况."

2. eburnation of dentin