I don't know a lot about kyphosis or Milwaukee braces or the kyphosis brace but I can tell you the braces are not meant to correct a curve but to stop it from progressing. I can also tell you that at 76 degrees and 14 years old his curve will most likely continue to increase and require surgery at some point. I can also tell you it is easier to do surgery in adolescence than at an older age since most of your growth is finished unlike childhood and the spine is still flexible. The older you get the less flexible your spine once you finish growing and the less correction can be obtained. Surgery is a big decision and there is nothing wrong with trying bracing first if you want to. Good luck with you son's case. I hope all goes well with whatever you choose.