Is there a contraindication to orthodonture in an AYA after high dose head and neck radiation where the mandible got close to full dose (e.g., 60 Gy for nasopharyngeal carcinoma)?  

I don't consider prior H&N radiation as a child or adolescent as a contraindication to forms of orthodontics. Having a dental professional with some experience in higher risk dentistry may be of benefit. During times of active imaging (e.g. the first 3-5 years post treatment), there may be a nee...