Dry Mouth in the UAE: Why AC & Bottled Water Are Rotting Teeth Quietly

The UAE combines low ambient humidity, near-constant air-conditioning, and a bottled-water-heavy population — all reducing salivary flow. Add common medications (antihistamines, SSRIs, blood-pressure drugs) and 15–20% of adult residents meet clinical xerostomia criteria. ### Why saliva matters Saliva neutralises acid, remineralises enamel, controls oral microbiome, lubricates speech and swallowing. Reduce it and caries, gum disease and denture ulcers accelerate. ### Diagnostic clues - Waking with cracked lips or a tongue stuck to the palate - Sipping water constantly during meetings - Rapid new cavities at the gumline (root caries) - Burning tongue ### The workup at a Dubai clinic 1. **Sialometry** — spit into a beaker for 5 minutes; below 0.1 mL/min stimulated = severe 2. **Medication review** — 400+ drugs list xerostomia as a side effect 3. **Systemic screen** — Sjögren's, diabetes, chemo/radiotherapy history ### Treatment ladder - **Behavioural**: humidifier at 40% RH in bedroom, tap-water default at meals, sugar-free xylitol gum after every meal - **Topical**: Biotene rinse and gel, MI Paste Plus, prescription 5,000-ppm fluoride toothpaste (Colgate PreviDent) - **Systemic**: pilocarpine or cevimeline when salivary glands still function ### Preventive dentistry adjustments High-risk patients get **3-month scalings + fluoride varnish every visit**. Custom fluoride trays at night (like whitening trays but with 1.1% NaF) drop new-caries incidence by ~60%. ### Cost pattern Sialometry AED 150–300. Custom fluoride trays AED 400–700. High-strength fluoride toothpaste AED 40–80 per tube. Total protective package well under AED 1,500 per year — far less than a single AED 3,000 restoration you'd otherwise need.