Ball and socket joints are useful, but making a part slide over the surface of a sphere, held by magnets, requires a lot of fiddling to get right. We admire persistence and nailing all the details.

Your hip joints are ball-and-socket joints positioned where your thigh bone meets your pelvis. The hip joint is involved in many types of movement. It is also one of the largest joints in the body, ...

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Your hip is a deep ball-and-socket joint where your thigh bone fits securely into your pelvis. When you have hip instability, your thigh bone may feel like it doesn’t fit into the hip socket securely.

Shoulder instability occurs when your shoulder joint (ball and socket) has lost is normal alignment (ball resting symmetrically in the socket), which causes your arm to lose its support. The most ...

The shoulder is a complex structure present on the upper body that connects the arms to the torso. It consists of many components that work together to provide stability and a wide range of movement.