I struggled with those feelings a little bit when I was younger. I was attracted to braces before puberty, even, and from then, all the way through college, I sort of felt like I 'needed help'. And then... at some point... I realized that me liking braces wasn't hurting anyone. Even myself! A fetish is like anything else you have a taste for: you must enjoy it in moderation and not let it control you.
For example- it's okay to love ice cream. But if you let that love take over, and you're eating a big bowl every day, pretty soon your health is going to suffer for it. You've got to be tough with yourself sometimes. But... if you're enjoying it every now and then... no big deal!
Loving braces is like that for me. I don't let myself get fixated on them, but I do enjoy looking at them, online and in person. My wife has been out of braces for over 10 years now, but I enjoy my little fantasies, remain faithful to my wife, and keep everything nice and balanced.
Once you can accept your fetish as part of who you are, and begin working towards moderating it, you'll be a happier man. Good luck!