hi ennvoy....i was born with a condition called multiple epiphisal dysplasia and un fortunately all 3 of my children were born with the same thing. i just had my 1st hip replacement surgery 3 weeks ago and i am 35 but the dr's said that they would not do my boys until they were in there 30's because of the activity level of teens and people in their 20's. i hope your child does great with their new hip. if you don't mind my asking was it an accident your child was in or were they born with a defect like my boys and myself. just wondering because if surgery helps your child then maybe my could do it younger so they could enjoy a more pain-free childhood. my boys are 18, 16,and 14.