Tooth decay is the destruction of the tissues of the tooth. It is usually associated with the intake of sugars and acids contained both in food and drinks. It usually does not hurt until it affects the nerve of the tooth. Oral hygiene habits, inadequate brushing techniques, lack of flossing, smoking, etc. favor the proliferation of bacteria on the mouth that in its initial stages appears as yellow or brown film on the teeth usually near the gums and grooves, favoring the appearance of cavities.