Can't help with any information about this operation, I'm afraid - but sorry to hear that your son will have to go through it :(
How old is he? My grandson was 8 when he broke his hip (Christmas 2005) - it had to be pinned, and he was in a full body cast for 8 weeks, then unable to put any weight on it for another 8 - in a wheelchair, then on a zimmer frame/elbow crutches. By June, he was up and running again - limping slightly to start with. By the time he had the pins removed, in December 2006 he was fine - might have been slightly protective/worried about falling over to start with - but enthusiastic enough to break his arm in the first gym lesson he was able to do :rolleyes: - January this year. All healed now - and he is back to playing touch rugby

They are very resiliant at this age.
Margot