I learned in Physical Therapy school that whenever a hip joint is replaced surgically, it has a high risk of dislocating. This was my first attempt at designing a hip joint that doesn't dislocate.
It essentially has three layers that have different functions. Two layers have channels that only move in one direction and one layer that allows spinning on a single plane. Together, the layers allow movement in all directions.
#dislocating #hip #joint #nondislocating #socket