Think about cost-benefit: in-office treatments are much faster but more expensive; take-home trays are cost-effective with steady
https://www.mediafire.com/file/wm32te5dhzxhx00/pdf-8349-8921.pdf/file
Consider cost-benefit: in-office treatments are quicker but more expensive; take-home trays are economical with steady results-- select based on timeline and spending plan.