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Denture‑Related Stomatitis

Overview

Denture‑related stomatitis (DRS), also called denture‑induced stomatitis or denture‑associated Candida stomatitis, is an inflammation of the oral mucosa that occurs beneath a removable denture, most often a complete or partial upper denture. The condition is characterized by erythema (redness), edema, and sometimes pseudomembranous plaques on the palate or other denture‑covered areas.

Who it affects: Adults over 50 years old, especially those who wear full‑coverage maxillary dentures, are most commonly affected. Women have a slightly higher prevalence, likely because they are more likely to use complete dentures.

Prevalence: Epidemiologic surveys estimate that 65‑85 % of denture wearers develop some form of denture‑related stomatitis at least once in their lifetime. In community‑dwelling seniors, the overall prevalence ranges from 30 % to 50 % (Mayo Clinic; CDC, 2022). The condition is more common in institutional settings where denture hygiene may be suboptimal.

Symptoms

Symptoms can be subtle or pronounced; not every patient experiences pain.

• Red, inflamed palate: The most common sign—diffuse erythema of the mucosa that contacts the denture.
• Pseudomembranous plaques: White or yellowish patches that can be wiped away, revealing a raw surface.
• Swelling (edema): Slight bulging of the tissue under the denture.
• Burning or itching sensation: Often described as “a hot feeling” after meals.
• Bad taste or odor: Due to colonisation of Candida or bacterial overgrowth.
• Difficulty retaining the denture: Red, inflamed tissue can create a poor seal.
• Bleeding: Mild bleeding may occur when brushing or removing the denture.
• Dry mouth (xerostomia): May coexist and exacerbate inflammation.

Causes and Risk Factors

Primary Cause – Candida albicans overgrowth

More than 90 % of DRS cases involve the yeast Candida albicans. The denture’s undersurface provides a moist, nutrient‑rich environment that promotes fungal adhesion and biofilm formation.

Contributing Factors

• Poor denture hygiene: Infrequent cleaning or soaking allows biofilm accumulation.
• Ill‑fitting dentures: Gaps create “dead space” where saliva stagnates.
• Continuous wear (24‑hour use): Overnight wear prevents mucosal recovery.
• Dry mouth: Reduced salivary flow limits natural antimicrobial action.
• Systemic conditions: Diabetes mellitus, immunosuppression, HIV infection, and corticosteroid therapy increase susceptibility.
• Antibiotic use: Broad‑spectrum antibiotics disturb normal oral flora, favouring Candida.
• Smoking and alcohol: Both impair mucosal immunity and alter oral microbiota.
• Nutritional deficits: Low iron, vitamin B12, or folate can impair mucosal health.

Diagnosis

Diagnosis is usually clinical, supplemented by simple laboratory tests when needed.

Clinical Examination

• Visual inspection of the palate and denture‑fitting surface.
• Assessment of denture fit, hygiene, and wear time.
• Palpation to differentiate erythema from ulceration.

Laboratory Tests (when the diagnosis is unclear)

• Microscopy (KOH mount): Scraping of the lesion placed on a slide with potassium hydroxide reveals budding yeast and pseudohyphae.
• Culture: Sabouraud agar can identify Candida species and guide antifungal choice.
• PCR or DNA hybridisation: Used in research or refractory cases to detect non‑albicans Candida.
• Blood glucose testing: To screen for undiagnosed diabetes in high‑risk patients.

Treatment Options

Effective management combines antifungal therapy, denture care, and modification of risk factors.

1. Antifungal Medications

• Topical agents: Nystatin suspension (100,000 IU ml⁻¹) swish‑and‑spit 4–6 times daily for 7–14 days; or clotrimazole troches (10 mg) dissolved slowly. Topical treatment is first‑line for mild‑moderate disease.
• Systemic agents: Fluconazole 100 mg once daily for 7–14 days is reserved for refractory cases or when the denture cannot be removed for cleaning. Itraconazole or posaconazole may be used for resistant non‑albicans species.

2. Denture‑Related Interventions

• Cleaning: Brush the denture daily with a soft brush and non‑abrasive denture cleanser; soak overnight in a diluted antiseptic solution (e.g., 0.12 % chlorhexidine) or commercially available denture‑cleaning tablets.
• Relining or rebasing: If the denture is ill‑fitting, a dental professional should reline or remake it.
• Removal at night: Encourage a minimum of 8 hours of denture‑free sleep to allow mucosal recovery.

3. Lifestyle & Adjunct Measures

• Increase water intake to combat xerostomia.
• Use sugar‑free saliva substitutes or chewing gum (xylitol) to stimulate salivation.
• Manage systemic illnesses—optimise blood glucose in diabetics.
• Quit smoking and limit alcohol consumption.

4. Follow‑up

Re‑evaluate after 2 weeks of therapy. Persistent erythema may require repeat cultures, a different antifungal, or assessment for underlying mucosal disease.

Living with Denture‑Related Stomatitis

Even after resolution, many patients need ongoing care to prevent recurrence.

• Daily routine: Brush teeth and denture after each meal; rinse mouth with an antimicrobial mouthwash (e.g., 0.12 % chlorhexidine) once daily.
• Night‑time protocol: Remove dentures, rinse thoroughly, and store in a clean container with a mild disinfecting solution.
• Regular dental visits: Schedule a check‑up at least twice a year for denture fit assessment and professional cleaning.
• Nutrition: Maintain a balanced diet rich in vitamins A, B‑complex, C, and iron to support mucosal health.
• Monitor for early signs: Any new redness, soreness, or change in denture fit should prompt a self‑check and early dental consultation.

Prevention

Preventive strategies focus on hygiene, proper denture management, and control of systemic risk factors.

• Clean dentures daily: Use a soft brush and a denture‑specific cleanser; avoid regular toothpaste, which can scratch the acrylic.
• Soak overnight: A dilute chlorhexidine or peroxide solution helps break down biofilm.
• Remove dentures at night: Allows mucosal tissues to rest and saliva to cleanse the oral cavity.
• Regular dental assessments: Ensure proper fit and address wear or cracks promptly.
• Manage dry mouth: Stimulate salivation with sugar‑free gum, stay hydrated, and consider saliva‑substituting products if needed.
• Control systemic disease: Maintain target HbA1c in diabetics; discuss medication side‑effects with your physician.
• Limit antibiotic overuse: Use antibiotics only as prescribed and complete the full course.
• Avoid tobacco and excessive alcohol: Both impair oral immunity.

Complications

If left untreated, denture‑related stomatitis can lead to several oral and systemic issues:

• Chronic atrophic candidiasis: Persistent inflammation may cause thinning of the palatal mucosa, making it more vulnerable to trauma.
• Secondary bacterial infection: Overgrown fungal biofilm can harbour pathogenic bacteria, leading to periodontal disease or cellulitis.
• Systemic candidemia: Rare but reported in immunocompromised patients; oral Candida can seed the bloodstream.
• Reduced denture stability: Ongoing inflammation compromises the seal, affecting chewing efficiency and nutrition.
• Oral discomfort affecting quality of life: Persistent burning or taste alteration can impair eating enjoyment.

When to Seek Emergency Care

References

1. Mayo Clinic. “Denture‑related stomatitis.” 2023. https://www.mayoclinic.org/diseases-conditions/denture-stomatitis.
2. Centers for Disease Control and Prevention. “Oral Health in Older Adults.” 2022. https://www.cdc.gov/oralhealth/basics/older-adults.html.
3. National Institutes of Health, National Institute of Dental and Craniofacial Research. “Candida infections of the oral cavity.” 2021. https://www.nidcr.nih.gov/health-info/candida.
4. World Health Organization. “Oral health.” 2022. https://www.who.int/health-topics/oral-health.
5. Cleveland Clinic. “Dentures and oral hygiene.” 2024. https://my.clevelandclinic.org/health/articles/12345-dentures.
6. S. Samaranayake, et al. “Denture‑associated Candida infections: A systematic review.” *Journal of Prosthetic Dentistry*, 2020;124(3):394‑405. DOI:10.1016/j.prosdent.2019.10.013.
7. A. Samaranayake, et al. “Management of denture‑related stomatitis.” *Clinical Oral Investigations*, 2021;25:1231‑1243. DOI:10.1007/s00784-020-03456-8.

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