This document discusses potential iatrogenic effects of orthodontic treatment, including intraoral effects like tooth decalcification, enamel trauma, and interproximal caries. It notes that white spot lesions are a common outcome, with incidence varying based on factors like fixed appliance type, tooth site, and oral hygiene. Prevention methods include patient education, fluoride application, and sealants. Enamel trauma can occur from metal brackets or ceramic brackets abrading teeth, and is prevented through careful positioning and use of smoother materials.