Efferdent cleans dentures through a combination of chemical oxidation, fizzing action, and surfactants that work together to lift stains, dissolve debris, and kill bacteria. When you drop a tablet into water, it triggers a series of reactions that turn ordinary tap water into an active cleaning solution within minutes. About 75% of each tablet’s active formula consists of two powerful oxidizing agents that do the heavy lifting.
The Fizzing Reaction
The moment an Efferdent tablet hits water, sodium bicarbonate (the same compound in baking soda) reacts to produce carbon dioxide gas. That’s the visible fizzing. This isn’t just for show. The rapid release of tiny bubbles creates mechanical agitation across the entire surface of the denture, reaching into grooves, crevices, and textured areas that a toothbrush would miss. The bubbles physically dislodge loose food particles and help the cleaning agents penetrate biofilm, the sticky layer of bacteria and proteins that builds up on denture surfaces throughout the day.
How the Oxidizers Remove Stains and Bacteria
The real cleaning power comes from two oxidizing compounds: potassium monopersulfate (about 42% of the tablet) and sodium perborate (about 33%). When sodium perborate dissolves in water, it creates an alkaline peroxide solution that releases oxygen ions. These oxygen ions attack organic material on the denture surface through a process called oxidative stress. In practical terms, the released oxygen breaks apart the chemical bonds in stain molecules and disrupts the structure of bacterial biofilms, essentially dissolving them from the inside out.
Potassium monopersulfate works similarly, acting as a strong oxidizer that targets the organic compounds responsible for discoloration from coffee, tea, tobacco, and food. Together, these two ingredients account for roughly three-quarters of the tablet’s active formula, making oxidation the primary cleaning mechanism.
Loosening Buildup With Detergents and Chelators
Efferdent also contains sodium lauryl sulfoacetate, a mild surfactant (detergent). Surfactants lower the surface tension of water, allowing the cleaning solution to spread more evenly across the denture and penetrate into microscopic pores in the acrylic material. This helps lift oily residues and food films that oxidation alone wouldn’t fully remove.
The tablet includes EDTA, a chelating agent. Chelators work by binding to mineral deposits, particularly calcium, that form the hard matrix of dental plaque. By pulling these minerals out of the plaque structure, the chelating agent weakens and softens buildup so the oxidizers and surfactants can wash it away more effectively. Sodium tripolyphosphate serves a similar function, helping to break down mineral-rich deposits and prevent them from reattaching to the denture surface.
How It Kills Bacteria
The combination of alkaline peroxide and potassium monopersulfate gives the solution strong antimicrobial properties. Lab testing shows that Efferdent achieves bactericidal activity against common pathogens like Staphylococcus aureus, with treated samples showing no visible bacterial growth on culture plates. The manufacturer reports a 99% reduction in plaque organisms after just 15 minutes of soaking.
The mechanism is straightforward: the oxygen released during dissolution creates an environment that most bacteria and fungi cannot survive. The oxidative stress damages bacterial cell membranes and disrupts the biofilm that normally protects colonies of microorganisms on denture surfaces. This is particularly relevant for preventing oral infections, since dentures can harbor yeast (especially Candida species) and bacteria that cause bad breath and gum irritation.
Water Temperature and Soak Time
Manufacturers recommend using warm water around 55°C (roughly 130°F), which is noticeably warm but not scalding. This temperature accelerates the chemical reactions, helping the tablet dissolve faster and the oxidizers work more efficiently. Water that’s too hot (above 80°C) can potentially damage soft lining materials on some dentures, so boiling water is not recommended.
Most of the cleaning action happens in the first 15 to 20 minutes, which is when the effervescence is most vigorous and the oxidizer concentration peaks. Overnight soaking is common and won’t harm standard acrylic dentures, but the active chemistry is largely spent within the first half hour. After soaking, rinsing the denture thoroughly under running water removes any residual cleaning solution before you put it back in your mouth.
What Each Ingredient Does
- Potassium monopersulfate (42%): Primary oxidizer that breaks down stains and organic matter
- Sodium perborate (33%): Releases oxygen to kill bacteria and dissolve biofilm
- Sodium bicarbonate: Creates the fizzing action that mechanically dislodges debris
- Sodium lauryl sulfoacetate: Surfactant that helps the solution spread and lifts oily residues
- EDTA: Chelating agent that softens mineral deposits in plaque
- Sodium tripolyphosphate: Breaks down mineral buildup and prevents redeposition
- Sodium saccharin and spearmint flavor: Add a fresh taste and scent to the cleaned denture
Why Brushing Alone Isn’t Enough
Denture surfaces are more porous than natural teeth, and acrylic resin has microscopic irregularities where bacteria settle and form biofilm. A toothbrush can remove loose debris and some surface buildup, but it can’t reach into the tiny pores or fully disrupt established biofilm. The chemical approach works differently: the oxidizers and chelators penetrate into those spaces at a molecular level, dissolving material that mechanical scrubbing leaves behind. Using both methods together, brushing before soaking, gives the most thorough clean because the brush removes the bulk of debris while the chemical soak handles what’s left at the microscopic level.