You have to trust that the Orthodonist is looking at the expensive xrays you have paid for and is thinking about not only the teeth that already needing to be straightened but the ones still yet to come in (think wisdom teeth). My oldest just had her braces taken off after 2 years and her teeth are beautiful! I started bugging the ortho after 1 and 1/2 years because my dgtr was miserable with the jaw pain, but we are both very satisfied with the results. They won't even consider putting my 12 yr old in braces until she has a few more permanent teeth, it is a very conservative practice. Trust the professional you are paying to do the job and you will be happy with the final result.