Strains from the muscles throughout the hip and pelvis could cause pain and spasm. The most common strains are groin pulls and hamstring strains. In this process, the tip on the thigh bone (femur) is capped which has a steel covering — a solid cobalt chromium metallic — very similar https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB