Clear aligners create space and straighten crooked teeth through:

-Widening of the dental arch: Initially, aligners widen the dental arch, creating room for teeth to be straighten teeth.

-IPR: IPR means removing a thin layer of the outer layer of the tooth, that make room for tooth movement to allow aligners to align crooked teeth effectively. Usually a minute amount is removed (Fraction of mm) it is removed manually by the aid of metal strips, or mechanically using dental turbine.

-Pushing molar teeth to the back to make a room to correct crooked teeth.
     - Moving front teeth forward that will provide a room to manage crooked  teeth.