While many people think of saliva as simply "spit," it performs several critical functions that help keep your mouth healthy. When saliva production decreases, the protective systems that defend your teeth and oral tissues begin to break down.¹^,³

Why Saliva Is Essential for Oral Health

Saliva serves as your mouth's natural defense system. It helps:

• Neutralize acids produced by oral bacteria
• Deliver minerals thar repair and strengthen tooth enamel
• Lubricate oral tissues
• Control bacterial and fungal growth
• Wash away food and debris
• Aid in chewing, swallowing and speaking¹^,²^,³

Every time you eat or drink something containing carbohydrates, bacteria in your mouth produce acids that attack tooth enamel. Under normal conditions, saliva helps neutralize these acids and restore a healthy pH balance.¹ Without adequate saliva, acid levels can rise, harmful bacteria can thrive, and the risk of tooth decay increases substantially.¹^,²

The Bottom Line

Dry mouth is more than an inconvenience. Saliva plays a critical role in protecting your teeth from decay, and when saliva levels drop, your cavity risk rises significantly. Reduced acid neutralization, impaired remineralization, decreased cleansing, and changes in oral bacteria all contribute to a more cavity-prone environment.¹^,²^,³

References

1. Jacob LE, Krishnan M, Mathew A, et al. Xerostomia: A Comprehensive Review with a Focus on Mid-Life Health. Journal of Mid-life Health. 2022;13(2):100-106. https://pmc.ncbi.nlm.nih.gov/articles/PMC9583374/
2. Plemons JM, Al-Hashimi I, Marek CL. Managing Xerostomia and Salivary Gland Hypofunction. Journal of the American Dental Association. 2014;145(8):867-873. https://jada.ada.org/article/S0002-8177(14)60200-2/fulltext
3. Kim YJ. Xerostomia and Its Cellular Targets. International Journal of Molecular Sciences. 2023;24(6):5358. https://www.mdpi.com/1422-0067/24/6/5358