What condition does dry mouth increase the risk for?

Dry mouth, or xerostomia, significantly increases the risk of root caries. This condition occurs when there is insufficient saliva in the mouth, which plays a crucial role in protecting teeth and maintaining oral health. Saliva helps wash away food particles and neutralizes acids produced by bacteria in the mouth. Without adequate saliva, the natural remineralization process of the teeth is disrupted, and specific areas of the teeth, particularly around the roots, become vulnerable.

Root caries occur more frequently in individuals with gingival recession, where the roots of the teeth are exposed and less protected by the enamel compared to the crowns. In a dry mouth scenario, the lack of lubrication and cleansing leads to an increase in plaque accumulation and bacterial growth on these exposed surfaces, thereby raising the risk of decay in these areas.

While dry mouth can also contribute to other oral health issues, such as cavities in enamel, gingivitis, and potentially oral cancer, its most immediate and marked effect is observed in the susceptibility to root caries. This connection is especially critical for populations that naturally have higher incidences of root exposure, such as older adults.