At Tooth Fairy we ensure IPR is done safely and by a dentist. We measure how much space is needed, this can range from 0.1mm to 0.3mm, and we decide this with the help of the computer planning software at the design stage.
The amount and where we do it, depends on the teeth and level of crowding. We can work around certain teeth where there is minimal space, and we need to correct crowding or poorly rotated teeth. Teeth that are very tight, and unable to be cleaned through, can be improved through the need of IPR.