This condition, also called osteonecrosis, occurs due to the death of a bone tissue. This happens due to lack of blood supply. This condition results in tiny breaks in the bone and leads to its collapse. The condition may be treated using conservative methods, core decompression and for severe cases, joint replacement surgery is the best option. Like other surgeries the procedure may take 1-2 hours. After surgery, take assistance from a care giver for at least 2 weeks to look into your needs. Take care to avoid falls. Follow the doctor ?s advice on rehabilitation programmes that offer range of motion. Usage of other aids like crutches is generally recommended for a few weeks. Having a positive approach enables speed recovery.