Denture Thrush & Burning Gums: Stomatitis Causes & Treatments

Denture Thrush & Burning Gums: Stomatitis Causes & Treatments

If the gums underneath your dentures feel like they are burning, look bright red, or feel tender to the touch, you are not alone. Many denture wearers assume this irritation is just a poor fit, but it is often a bacterial and fungal infection known as denture stomatitis (commonly called denture thrush).

Because our principal prosthetist has 30+ years of experience, we have treated thousands of patients struggling with this exact discomfort. Let’s break down exactly what denture stomatitis is, what causes it, how to treat it, and when to seek professional care in Melbourne.

What Is Denture Stomatitis (Denture Thrush)?

Denture stomatitis is an inflammation of the oral tissue beneath a denture. It is most commonly caused by an overgrowth of Candida albicans, a naturally occurring yeast (fungus) in the mouth.

When your denture covers your gums for too long or isn't cleaned properly, it creates a dark, warm, and moist environment. This is the perfect breeding ground for yeast to multiply.

Symptoms to Look For

Unlike vaginal thrush or oral thrush in children, denture thrush does not always show white patches. Instead, you might experience:

• A burning sensation in your palate (roof of the mouth) or gums.
• Bright red, inflamed patches that match the exact shape of your denture base.
• Dry mouth or a metallic taste.
• Cracked, red sores at the corners of your mouth (angular cheilitis).

What Causes Burning Gums Under Dentures?

Understanding the cause is the first step to permanent relief. Stomatitis is rarely caused by a single factor:

1. Wearing Dentures 24/7 (The Palate Suffocation Trap)

Gums need oxygen and blood flow to stay healthy. If you never remove your dentures, you suffocate the tissue, trapping moisture and yeast underneath.

2. Poor Denture Hygiene

Acrylic is porous. It has microscopic holes that soak up saliva, bacteria, and yeast. Without daily disinfection, the yeast embeds itself deep into the denture base.

3. Ill-Fitting Dentures

A loose or rocking denture causes constant friction against the gums. This micro-trauma damages the delicate outer skin of your gums, making it easier for yeast to invade.

4. Underlying Health Conditions & Medications

Your immune system usually keeps yeast in check. However, your risk increases if you have:

• Diabetes (excess sugar in saliva feeds yeast).
• Dry Mouth (Xerostomia) (saliva naturally washes away yeast).
• Use of steroid inhalers or broad-spectrum antibiotics.

How to Treat Denture Stomatitis (Step-by-Step)

To cure denture thrush permanently, you must treat both your mouth and the denture itself. If you only treat your mouth, the yeast embedded in the denture will re-infect you immediately.

Step 1: Disinfect the Denture (Crucial)

• Soak in Chlorhexidine: Soak your dentures in a chlorhexidine mouthwash (like Curasept or Savacol) or a specialised denture cleanser daily.
• Do NOT use bleach on dentures with metal clasps or pink acrylic as it will corrode and discolour them.
• For partial dentures with metal, use a non-chlorinated anti-fungal soak recommended by your dentist or prosthetist.

Step 2: Clear the Oral Infection

• Antifungal Gels or Drops: Your doctor or dentist may prescribe antifungal gels (like miconazole or nystatin) to apply directly to the tissue-facing side of the denture before putting it in your mouth.
• Keep Gums Clean: Gently brush your gums, palate, and tongue twice a day with a soft-bristled toothbrush to sweep away plaque and yeast.

Step 3: Give Gums a Rest

• Leave your dentures out for at least 6 to 8 hours every day (ideally overnight). Keep them in clean water or a denture bath while you sleep.

FAQ: Denture Thrush & Burning Gums

Is denture thrush contagious?

No. Candida yeast is already present in everyone's mouth. The infection is caused by an overgrowth due to local factors (denture wear, hygiene) rather than catching it from someone else.

How long does it take to cure denture stomatitis?

With consistent treatment (medicated gels and overnight soaking), mild to moderate cases typically resolve in 10 to 14 days. Severe cases may take longer and require oral antifungal tablets.

Can I use regular toothpaste to clean my dentures?

No. Regular toothpaste is highly abrasive and creates microscopic scratches in the acrylic base. Yeast and bacteria hide inside these scratches, making them almost impossible to clean. Use a specialised denture paste or mild soap.

Why do the corners of my mouth hurt when I have denture thrush?

This is a condition called angular cheilitis. It often happens when worn-down dentures cause the jaw to over-close, allowing saliva to pool at the corners of the mouth, which breeds yeast.

What should I do if the burning doesn't go away?

If burning persists after 2 weeks of antifungal treatment and thorough cleaning, seek a professional dental evaluation. You may need a denture reline to stop friction, or blood tests to check for vitamin deficiencies or diabetes.

Need Help? Book an Assessment at Oak Park

If your dentures are causing constant gum irritation or burning, let us evaluate them. We can assess the fit, offer professional ultrasonic cleaning, or recommend a reline to restore comfort.

Call (03) 9306 5432 or book an appointment online.