IPR also known as interproximal reduction, a dental procedure that involves polishing between teeth to create more space for them to move during orthodontic treatment. It is also known as enamel reduction. IPR is a common technique used in orthodontics, particularly with clear aligner therapy, to help improve the alignment of teeth and create a more ideal bite. The amount of enamel removed is very small, usually only a fraction of a millimeter, and is done in a controlled and conservative manner to ensure the long-term health of the teeth.