A mouthpad for cleaning teeth and oral transmucosal drug delivery has a U-shaped
plate sized to cover substantially only the biting surfaces of upper and lower
teeth of a human jaw. The plate is positioned between the upper teeth and lower
teeth such that when the teeth are rinsed with a liquid, the liquid flows primarily
through the crevices between individual teeth and physically detaches the adhering
residue within. Alternatively, using fluids containing drugs for rinsing while
biting on the plate can deliver drugs through the oral mucosa. A method of cleaning
teeth and delivering drugs through oral mucosa using a plate positioned between
the upper and lower teeth is also disclosed.