When shallow caries occurs, it is recommended to fill the tooth, shallow caries will progress to medium caries, deep caries, pulpitis, periapical inflammation, and ultimately lead to missing teeth in severe cases if it is not filled, as follows.
Shallow caries is not treated, the bacteria continue to invade the tooth tissue, when the caries progress to the superficial dentin layer, this time for the caries, continue to develop, when the caries progress to the deep dentin layer, for deep caries, at this time, if there is cold water or food into the cavity will cause toothache.
If deep caries develops further, the bacteria invade the pulp, which will lead to pulpitis, and the tooth pain will be aggravated at this time. After the pulp is necrotic, the inflammation spreads further and affects the periapical tissues, forming apical periodontitis, and in severe cases, the tooth will fall out.
If shallow caries and the above symptoms occur, it is recommended to go to the hospital in time.