“…In patients with oral disorders, such products may nevertheless be recommended for removing crusts, fungi, bacteria, food debris, and thick saliva. For that purpose, a procedure recommended by Western Norway Regional Health Authority [13] suggests cleansing with 0.5% hydrogen peroxide or NaCl 9 mg/ml [17][18][19]. However, it is not known what the long-term effect of active solutions such as hydrogen peroxide, applied frequently, may have on the oral mucosa.…”