Assertion: shoulder's bone | /r/CapableOf | grind against one another
Facets:
value: without this protective covering
type: OTHER
Source sentences:
text: The cartilage loses its normal chemical makeup, becomes frayed and worn, and eventually disappears; without this protective covering, the underlying bones grind against one another, causing pain.
text: When osteoarthritis (OA) affects the shoulder, the cartilage cushioning the bones softens and wears away, causing the bones to grind against one another.