Question: what is the difference between boost and zoom whitening?
Answer: The Zoom! Chairside System was an average of 1 to 2 shades better than the Opalescense Xtra Boost Kit at all time points. Results were directionally better at Day 2 (p < 0.08) and significantly better at Day 7 (p < 0.0025). Both products produced whitening of between 6 and 9 shades.