If the cavity is still very small, the best form of treatment would be getting a pit and fissure sealant applied by a dentist. This would require no drilling unless the cavity is large and in that case proper restorative procedures are carried out.
Mildew is a form of fungus. It is distinguished from its closely-related counterpart, mold, largely by its color: molds appear in shades of black, blue, red, and green, whereas mildew is white.orticulturalists classify mildew differently than most other people. In horticulture, mildew is either species of fungus in the order Erysiphales, or fungus-like organisms in the family Peronosporaceae. It is also used more generally to mean mold growth.
Though they both sprout from spores and in places that are warm and moist, they are different kinds of fungi. Mold mostly grows in food while mildew is usually found in paper, textiles or showers. Their colors also vary. Mold takes the color of green, blue, red or black while mildew is white or gray.