Never never never. My daughter's teeth went crooked in less than 3 months after removing the braces. He refused to fix them unless we paid again. The other orthodontists we go to have a one year retention policy. Dr Trapnell did not care. When we mailed him a letter to express our concerns, he met with my husband. Crumbled up the letter in front of him and said "we will pretend this did not exist." After that, I started researching and asking questions in our area. Seven of my dear friends had similar experiences as far as teeth going crooked. I highly recommend either Dr. Barrows in Spanish Fork or Dr. Warren in Springville. BOTH are perfectionist and both carry a one year retention. And just like Dr Trapnell - the consult is always free.