Xerostomia

Xerostomia - Parched Prelude

• Subjective sensation of dry mouth due to ↓ saliva.
• Etiology:
  • Medications (Most Common in Elderly): Anticholinergics, antihistamines, diuretics, antihypertensives, antidepressants.

    ⭐ Medications (anticholinergics, antihistamines, diuretics) are the most common cause of xerostomia in older adults.

  • Sjögren's syndrome (autoimmune destruction of salivary/lacrimal glands).
  • Radiation therapy (head & neck cancer).
  • Systemic diseases: Diabetes mellitus, HIV/AIDS, dehydration, anxiety/depression.
  • Salivary gland aplasia/agenesis (rare).
• Consequences: ↑ Dental caries, oral candidiasis, dysphagia, dysgeusia, difficulty with speech/dentures.

Xerostomia - Dry Detectives

• Definition: Subjective sensation of dry mouth.

• Etiology: Medications (anticholinergics, diuretics), Sjögren's syndrome, radiation therapy (head & neck), dehydration, systemic diseases (diabetes, HIV).

• Clinical Features:

  • Difficulty swallowing (dysphagia), speaking (dysphonia), & chewing.
  • Oral soreness, burning sensation.
  • Altered taste (dysgeusia).
  • Increased dental caries (especially cervical & root caries).
  • Oral mucosal dryness, atrophy, fissuring.
  • Lobulated/fissured tongue, depapillation.
  • Thick, ropy, or scanty saliva.
  • Halitosis.

• Diagnosis:

  • Detailed history (medications, systemic conditions).
  • Clinical examination: Mirror adherence to buccal mucosa, frothy saliva.
  • Sialometry: Measurement of salivary flow rates.

    ⭐ Unstimulated whole salivary flow rate < 0.1 mL/min is a key diagnostic criterion for hyposalivation.

  • Stimulated whole salivary flow rate < 0.5-0.7 mL/min.
  • Salivary gland biopsy (minor glands, labial): Focal lymphocytic sialadenitis in Sjögren's.
  • Serology: Anti-SSA/Ro, Anti-SSB/La antibodies for Sjögren's.

Xerostomia - Arid Aftermath

• Definition: Subjective sensation of dry mouth due to ↓ saliva.
• Etiology:
  • Medications (anticholinergics, diuretics, antihistamines, antidepressants).
  • Sjögren's syndrome.
  • Radiation therapy (head & neck).
  • Systemic diseases (diabetes, HIV/AIDS).
  • Dehydration, anxiety.
• Clinical Features:
  • Difficulty swallowing (dysphagia), speaking (dysphonia), & tasting (dysgeusia).
  • Oral burning, soreness.
  • Dry, fissured tongue; atrophic oral mucosa.
  • Dental caries, oral candidiasis.
• Management:
  • Symptomatic: Saliva substitutes, sialogogues (pilocarpine, cevimeline).
  • Address underlying cause.
  • Oral hygiene, frequent sips of water.

⭐ Xerostomia significantly increases the risk of oral candidiasis and rapidly progressive dental caries, particularly root caries.

Xerostomia - Moisture Makeover

Management aims to relieve symptoms, prevent complications, and stimulate saliva if possible.

• Symptomatic Relief:
  • Saliva substitutes (e.g., carboxymethylcellulose, mucin-based products).
  • Oral lubricants, mouth-wetting agents. Frequent sips of water.
• Salivary Stimulation (if glands functional):
  • Gustatory/Masticatory: Sugar-free candies/gum (xylitol beneficial).
  • Pharmacological (Sialogogues):
    • Pilocarpine (cholinergic agonist).
    • Cevimeline (selective M3 muscarinic receptor agonist).
• Preventive Care:
  • Meticulous oral hygiene, topical fluoride application, regular dental visits.
• Etiology-Specific:
  • Address underlying systemic diseases (e.g., Sjögren's syndrome).
  • Review and modify potentially xerostomic medications.

⭐ Pilocarpine (5mg TID) is a commonly prescribed cholinergic agonist for stimulating salivary flow in patients with residual salivary gland function.

High‑Yield Points - ⚡ Biggest Takeaways

• Xerostomia: subjective sensation of oral dryness; a symptom, not a disease.
• Key causes: medications (anticholinergics, diuretics), Sjögren's syndrome, head/neck radiation.
• Clinical impact: ↑ risk of dental caries, oral candidiasis, dysphagia, dysgeusia.
• Diagnosis: Primarily clinical; sialometry (unstimulated flow < 0.1 mL/min) confirms.
• Management: Treat cause, symptomatic relief (saliva substitutes), sialagogues (e.g., pilocarpine).
• Pilocarpine (cholinergic agonist) stimulates saliva; meticulous oral hygiene is crucial.