Hello, I know you've gotten a lot of responses, but I thought I would give you a slightly different insight. As a child I have the worst crooked teeth ever. We're talking teeth that were completely sideways, I had a double molar for a while, the works. The dentist told my mom I would need major braces and wanted to start working on them before my permanent teeth came in. We didn't have the money to do anything, so we didn't. When my adult teeth came in they were perfectly straight, I've never had braces and people are amazed when I tell them this. I know this doesn't guarantee your child's teeth will be straight, but I thought I would give you a little hope.