Consider cost-benefit: in-office treatments are much faster however more expensive; take-home trays are economical with steady
https://www.mediafire.com/file/wx522klzfwp548y/pdf-4503-73326.pdf/file
Think about cost-benefit: in-office treatments are quicker but costlier; take-home trays are cost-effective with gradual results-- pick based on timeline and budget plan.