Hi Leonardo,
I am not an MD, but a very good reason why you are not your positive self is the effects of the anesthesia and that your body has just undergone a major surgery. Give yourself time on that one, but you will see in a few days to weeks, you will be back to your chipper self
Also, again I am not an MD, but please realize that your femur head is bone and bone does grow back. Right now it is sitting in a nice little capsule, kind of like getting your tooth capped. They grind your tooth down and then put a cap on it. The wonderful thing about bone is that it does grow back. So, unless I am totally off base here, I believe that your femur head will grow bone to fill the cap, the neck will grow bone around the stem. This should make you very strong. Weight bearing exercises, walking, will speed bone growth. Of course calcium is good too, but do not take more than 500 mg at one time, as the rest is wasted as your body can only absorb and use 500 mg at a time. Also be sure to take calcium supplements that is with vitamin D, then the calcium works at its best. I'm not sure about the cartilage, but a lot has been written that Glucosamine Chondroiten (spelling might be wrong) regenerates cartilage, but I don't think there are conclusive studies.
Here in the U.S. MD's are being very conservative about returning to activities. I was told to be very,very, very careful for the first 12 weeks so as not to break the femur neck. That is what I would warn for you. Also, I was told for the 1st year do not run or jump. Any due diligence to preserve the femur neck is what you need to do during this first year. That is your biggest risk, my friend, fracturing the femur neck.
At this point, Leonardo, my best advice... Don't worry about future operations. You have done a good thing getting your hip resurfaced. Focus on your recovery right now and everything else will just work itself out. Believe everyone on this site. We all have been where you are now. And, we've made it and are living pain-free and doing a lot of things we were not able to do before surgery.
What will happen now... you are so young... go enjoy yourself and your life cuz the pain is gone. Keep us posted, Elaine
Right BHR 1/22/08 Dr. Eugene Lopez