My dentist is also utterly horrified, we talked about this 7 years ago - "destroying perfectly healthy teeth". Rylan's teeth looked fine. He could have had a brace on the bottom to straighten them if he wanted. Shocking. Clearly there are unfortunately too many dentists with no integrity. Shame on them.
I saw him on some show a couple of years ago & I'm sure he had some invisible braces on. He even took them out to show us how good they were. So why he decided to look like Mr Ed is beyond me.