Fig. (3) Degree of discomfort/pain directly after, one week and 24 months after treatment. Participants gave a mark from 0 on the VAS scale, indicating no discomfort/pain at all, to 100 to indicate great discomfort/pain. The box plot shows the distribution of responses on the five-number summary; minimum, first quartile, median, third quartile and maximum. Statistically significant differences between rotary bur and laser techniques on all five occasions that were evaluated (p<0.001-0.005).