How much effectibe are braces in correcting ugly crooked teeth?

Very: they are v effective--make sure you use a good orthodontic specialist

Very: In the hands of trained Orthodontic Specialists using braces there is an average of over 90% improvement when results compared to American Board of Orthodontics standards. Clear aligner results are less that 50% effective, but still a great improvement over the initial malocclusion. In the hands of non-Orthodontists the results are generally compromised when compared to Orthodontist's results.

Very predictable: Generally the worse your problems are with your teeth the more predictable you will see significant improvement. Crooked teeth look ugly, even though you may actually have beautiful the only look ugly because they are crooked. You will be amazed how much a trained Orthodontist can improve the appearance of your ugly, crooked teeth.