Appliance care.
Most appliances that fail early fail because of how they were treated rather than how they were made. Patients need specific instructions rather than a general suggestion to keep it clean.
Heat is the most common cause of damage
Acrylic, thermoplastic and flexible denture materials all distort with heat, and the distortion is permanent. A prosthesis that has been through a dishwasher, soaked in hot water, or left on a windowsill or in a car will not seat again.
Tell patients to clean with cool or lukewarm water only, and never to attempt sterilization by boiling. It is the single most useful instruction to give.
It is also worth mentioning where not to leave it. A prosthesis left near a radiator or in a hot vehicle distorts without ever being cleaned.
Cleaning dentures
Brush daily with a denture brush and a non-abrasive cleaner — not ordinary toothpaste, which is abrasive enough to scratch acrylic over time and create surface for plaque to accumulate.
Clean over a basin of water or a folded towel, because a dropped denture on a hard surface is a fracture.
Soaking in a proprietary denture cleanser supplements brushing but does not replace it. Mechanical cleaning removes biofilm; soaking alone does not.
Cleaning guards and splints
Rinse immediately after removal, before saliva and debris dry onto the surface. Brush gently with a soft brush and cool water.
Avoid alcohol-based mouthwashes and abrasive pastes, both of which degrade acrylic and thermoplastic surfaces over time.
Store dry in a ventilated case rather than sealed wet in a container, which encourages microbial growth. Allow it to air dry before closing the case.
Materials needing particular care
Flexible partials should not be brushed aggressively or cleaned with hot water, and some denture cleansers are unsuitable — check the manufacturer's guidance and pass it on.
Soft liners are more fragile than the base they sit in. Brushing firmly damages the surface, and some cleansers degrade the material. They have a finite life and need replacing periodically.
Metal frameworks should not be soaked in cleansers containing hypochlorite, which can corrode some alloys.
Wear and review
For dentures, leaving the prosthesis out at night allows the tissue to recover and reduces the risk of denture stomatitis. Store it in water or a cleanser solution so the acrylic does not dry out and distort.
For guards and splints, wear as prescribed and bring the appliance to every review appointment. Wear on the guard is information about the patient's parafunction and worth looking at.
Advise patients to return rather than adjusting anything themselves. A prosthesis trimmed at home with a nail file is frequently unsalvageable.
Denture stomatitis and hygiene
Inflammation of the denture-bearing mucosa is common, usually associated with candida, and almost always associated with a prosthesis that is worn continuously and cleaned inadequately.
Management is mechanical before it is pharmacological: thorough daily cleaning of the fitting surface, leaving the denture out overnight, and correcting the fit if the prosthesis is traumatizing the tissue.
An acrylic surface that has become scratched and porous through abrasive cleaning harbours biofilm that brushing will not remove, which is one reason to steer patients away from ordinary toothpaste.
What to give the patient in writing
Verbal instructions at a fit appointment are rarely retained. A short written sheet covering cleaning method, what to avoid, storage, wearing schedule and when to return is worth producing once and giving out every time.
Include the practice's number and a clear statement that adjustments are expected rather than a sign something has gone wrong. Patients who believe an appliance should be perfect from day one stop wearing it when it is not.
When to come back
Any sore spot that does not settle within a day or two. Any looseness, rocking or clicking. Any crack, however small, since a crack propagates. Any change in fit after weight loss or illness.
Patients frequently tolerate a poorly fitting prosthesis for years because they assume the deterioration is inevitable. Telling them explicitly that fit is maintainable changes that.
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