Dry Mouth (Xerostomia): Causes, Consequences, and Treatments
What is dry mouth or xerostomia?
Dry mouth occurs when the salivary glands do not produce enough saliva to keep the oral cavity hydrated. Saliva is crucial for digestion, balancing the oral microbiome, and protecting teeth and soft tissues.
The main functions of saliva include:
✔️ Lubricating the oral mucosa to facilitate chewing and speech
✔️ Neutralizing acids that can erode tooth enamel
✔️ Antimicrobial action to prevent infections
✔️ Initiating the digestive process through enzymes like amylase
Causes of xerostomia
🔹 Medication use: Antihistamines, antidepressants, diuretics, and analgesics can reduce saliva production
🔹 Systemic diseases: Diabetes, Sjögren's syndrome, and autoimmune diseases affect the salivary glands
🔹 Radiation therapy and chemotherapy: Cancer treatments can damage the salivary glands
🔹 Dehydration: Insufficient water intake or medical conditions that cause fluid loss
🔹 Stress and anxiety: Affect the nervous system, reducing salivary secretion
Symptoms of dry mouth
✔️ Burning sensation or dryness in the mouth
✔️ Difficulty chewing and swallowing dry foods
✔️ Persistent bad breath
✔️ Cracked lips and tongue
✔️ Increased risk of cavities and periodontal disease
Consequences of dry mouth on oral health
✅ Increased risk of tooth decay: Saliva helps remineralize enamel and remove bacteria
✅ Periodontal diseases: Lack of saliva promotes gum inflammation
✅ Oral infections: Higher probability of oral candidiasis and canker sores
✅ Problems with dental prostheses: Lack of lubrication can cause irritation and ulcers
Treatments and solutions for dry mouth
🔹 Adequate hydration: Drink water regularly and avoid caffeinated or alcoholic beverages
🔹 Saliva substitutes: Specific gels and rinses help maintain oral moisture
🔹 Sugar-free gum and candies: Stimulate saliva production
🔹 Use of humidifiers: Maintain environmental humidity, especially at night
🔹 Saliva-stimulating medications: Pilocarpine or cevimeline may be prescribed in severe cases
Preventive care for patients with xerostomia
✔️ Use of fluoride toothpastes to strengthen enamel
✔️ Avoid very dry or salty foods that worsen the sensation of dryness
✔️ Maintain a diet rich in hydrating fruits and vegetables
✔️ Regular dental check-ups to monitor oral health
Conclusion
Dry mouth is a condition that can affect oral and general health if not managed properly. Identifying its cause and applying appropriate treatments can improve the patient's quality of life and prevent dental complications.
Legal Notice and Disclaimer
This article is part of ONAK's Dictionary of Medical Terms and is for informational purposes. It does not replace consultation with a dentist or oral health specialist.
Bibliography
- Dawes, C., Pedersen, A. M. L. "The Functions of Saliva and the Consequences of its Loss for Oral Health." J Dent Res. 2021; 100(10): 985-993. Available at: https://pubmed.ncbi.nlm.nih.gov/33887226/
- Villa, A., Wolff, A. "Salivary Gland Dysfunction: An Update on Diagnosis and Treatment." Clin Oral Investig. 2022; 26(2): 1003-1017. Available at: https://pubmed.ncbi.nlm.nih.gov/34384012/
