Thorough brushing with dilute hydrogen peroxide, with emphasis on the gum line, and flossing, help prevent the formation of harmful biofilm, gingivitis, and tartar.
If the patient fails to change the factors that allowed the disease to set in- for example, not flossing, only brushing once a day- the infection will likely recur.
Brushing and flossing can remove plaque from which calculus forms; however, once formed, it is too hard and firmly attached to be removed with a toothbrush.
In their work they measured the impact of psychological reactance with two parallel studies: one advocating flossing and the other urging students to limit their alcohol intake.