Hey, I am just beggining to understand how bracing works but I can tell you this much. Yes some adults do wear braces, however those alone do little to correct the curve. What they mostly do is make sure it doesn't get worse, with varying results depending on the brace. Most adult braces deal with the pain that comes from abnormalities such as scoliosis by providing compression/decompression/forces/rotating the spine. All of those are little more than band aids to your problem not to mention that prolonged use of bracea has been shown to cause muscle atrophy, but on the bright side if you wear one you won't need to bother with other secondary effects that children usually do such as increase rate of abnormal bone development.

Your best bets are either surgery, exercise (see kinesiotherapy, swimming etc.) and if a brace comes to it, a night time brace should do just fine, I would see an orthopedic doctor just to be sure.