Proper denture care becomes specialized when a soft reline is involved. A soft reline is a layer of soft, cushioning material added to the fitting surface of the denture to improve comfort and fit. This procedure is commonly recommended for individuals with sensitive gums, prominent bone ridges, or those who have recently undergone dental surgery or extractions. The soft liner acts as a shock absorber between the hard acrylic base and the delicate oral tissues, requiring specific care to maintain its unique properties.
Understanding the Soft Reline Material
The soft reline is made from a material distinct from the hard acrylic that forms the body of the denture. These liners are typically composed of either a silicone-based polymer or a plasticized acrylic resin, such as poly-ethyl methacrylate (PEMA). The purpose of these materials is to remain resilient and flexible, providing a comfortable, forgiving interface against the gums.
Unlike the hard acrylic, the soft liner is inherently more porous, especially the acrylic-based versions. This porosity means the material is more susceptible to absorbing water, oral fluids, and chemical substances, which can lead to discoloration and the proliferation of microorganisms. The plasticizers in acrylic-based liners, which keep the material soft, can leach out over time, causing the liner to harden and lose its cushioning effect. Silicone-based materials are generally less prone to water absorption and retain their resiliency longer, but they still require careful handling to preserve their integrity.
The Rules of Soaking and Immersion
You can and should soak your dentures after a soft reline, but only with appropriate liquids and for specific durations. Soaking is necessary to keep the reline material hydrated, which helps prevent it from shrinking or becoming brittle. The safest and most common solution for overnight storage is plain, cool water.
However, the use of many traditional denture cleaning solutions requires caution, as manufacturers often advise against prolonged exposure to effervescent cleansers. Harsh chemicals can be absorbed into the porous soft liner, leading to accelerated hardening, discoloration, and a loss of flexibility. Specifically, you must avoid solutions containing bleach, alcohol, or strong acids, as these will chemically degrade the liner over time. Hot or boiling water must also be avoided entirely, as excessive heat will warp both the soft liner and the hard denture base. If a commercial denture cleaner is used, it should be one specifically recommended by your dental professional for soft reline materials, and the soaking time should be limited, often to no more than 30 minutes.
Daily Cleaning and Handling Guidelines
The daily physical cleaning process is arguably more important than soaking for maintaining the soft reline. You should gently brush the entire surface of the denture, including the soft liner, at least once daily to remove plaque, food debris, and bacteria. For the soft liner itself, a very soft-bristled brush, such as a baby toothbrush or a specialized denture brush, should be used.
It is crucial to use a non-abrasive cleanser for this process, as regular toothpaste and harsh abrasive scrubbing materials will scratch the soft surface, creating more areas for bacteria to accumulate. Mild hand soap or a specific non-abrasive denture paste is the preferred choice for cleansing the liner. After brushing, the denture must be rinsed thoroughly under cool running water to remove any residual soap or cleaner before reinsertion. When handling the denture during cleaning, always do so over a basin of water or a folded towel; this precaution prevents the appliance from breaking if it is accidentally dropped.
Extending the Life of the Soft Liner
Long-term care involves protecting the soft liner from environmental and chemical factors that shorten its lifespan. The typical longevity for a soft reline ranges from about six months up to two years, depending largely on the material used and the patient’s habits. Silicone-based liners often demonstrate greater durability and elasticity retention compared to their acrylic counterparts.
Beyond daily cleaning, you should limit exposure to foods that are extremely hard, sticky, or contain small seeds, as these can become embedded in the soft material and cause damage. Consistent avoidance of excessive heat, such as leaving the denture in a hot car or near a stove, is necessary to prevent warping. Regular professional check-ups are also a necessary part of maintenance, allowing the dental professional to clean, assess, and replace the soft liner when it begins to harden or degrade.