How a Deep Cavity in a Back Molar Can Affect the Gum, Tooth Nerve, and Jaw

A deep cavity in a back molar is more than a visible hole in the tooth. When decay progresses through the protective enamel and dentin, bacteria may approach or enter the dental pulp, the soft tissue containing nerves and blood vessels. Depending on the extent of the damage, the tooth may develop pulp inflammation, pulp death, or an infection around its root.