Short answer: a lot.
There was a bit of a stir recently when a 24 year old digital design student, made his own braces using a a high-end 3D printer at his university in America. You can read more about it here.
While this innovation is great and will certainly help advance the dental industry in the future, the growing trend of DIY braces is a worrying one. The incorrect alignment of teeth can cause huge issues in the future, causing changes to the bite. This can lead to tooth wear, bone loss and possibly even pain in the future.
If you are unhappy with your smile, we recommend coming in and seeing us for a check up so that we can refer you to a qualified orthodontist.