My sister had this device implanted to replace the ball & socket of her shoulder.
"Also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint"
All along she's been nothing but encouraging to the rest of us siblings. As the bone in her shoulder literally was disintegrating.
Meanwhile I'm trying to be more social while simultaneously in a manic state dumping social contacts.