The labrum and cartilage naturally degenerate with use, and there is a genetic predisposition to arthritis.

“the labrum will naturally degenerate just by using it so will the cartilage and look every we know there's a genetic predisposition to arthritis by arthritis I mean not just inflammation of the joint but a a true loss of the cartilage integrity and that's kind of those two terms are used interchangeably by different people in different sub-specialties but for our purposes as an orthopedic surgeon it's when the joint is degenerating and the cartilage surfaces are no longer pristine”