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False Teeth - Usefulness of Denture Adhesives

Denture adhesives enhance the retentive interface between the surface of a denture and the underlying tissues upon which false teeth rest.

Optimizing the Interface Space

There is a slight space at the interface between the inside of a denture and the jaw that is usually filled with saliva. As this gap increases, a denture becomes less retentive and stable.

The interface space arises because of material and fabrication limitations used in making a denture. This gap also is contributed to by the constant changing contour and shrinkage of jawbone.

While an interface space exists in all dentures and increases with time, optimum denture function and retention depends upon reducing it. Denture adhesives fill this increasing space, improve suction, and create a sticky contact between a denture and underlying surfaces. This also helps resist foods from collecting under the denture base.

How to Use Denture Adhesives

Thin paste adhesives are preferred to powders since they are already fluid and easier to manage and apply. However, some prefer powder types. Whatever works best for an individual should be used.

Pea-sized amounts of the paste may be placed in a few places within a denture where jaw ridges fit and where the roof of the mouth contacts. A thin film of adhesive spreads out as a denture seats in the mouth. Use the least amount to do the "job."

If excess amounts are necessary, then the opinion of a dentist should be sought since denture maintenance may be necessary. A licensed dentist should be routinely seen at six-month intervals for routine oral examinations and bite adjustments.

A person needs to experiment with how often to apply adhesives. Some apply it before meals while others function satisfactorily all day with one application.

A denture and mouth should be cleaned of all adhesives at least once a day, and the denture should be left out of a cleaned and rinsed mouth for at least an hour a day.

How to Clean Up Your Dentures

It can be difficult removing adhesives. The denture may be cleaned with a brush, soap, and running water, or with a little white distilled vinegar in water.

All adhesives should be removed from the mouth for hygienic purposes. Rinsing with extremely warm water or salt water helps removal. It may be necessary to use a soft toothbrush or wash cloth-like material to assist removal from the mouth tissues.

Advantages of Denture Adhesives

• Effectively fills the interface gap between a denture and underlying jaw.
• Provides a sense of security with wearing dentures, even with well-fitting dentures when additional confidence is desired.
• Facilitates acceptability and builds confidence with wearing new dentures.
• Reduces food impaction beneath dentures by closing prosthesis borders.
• Helps an individual open their mouth wider for more confident chewing (increases the chewing stroke), rather than eating with small strokes to compensate for concerns about the potential for a denture coming loose.
• Decreases the irritation and chafing of mouth tissues from habits such as grinding teeth together (parafunctional activities).
• Facilitates wearing dentures for individuals with persistent dry mouth (xerostomia).

Disadvantages of Adhesives

• Difficult to remove denture adhesive from the mouth and denture.
• A false sense of security that a denture is still satisfactory may develop from using adhesives with a poorly-fitting denture that should be relined, replaced, or maintained in different ways.

by Joseph J. Massad, D.D.S.

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.

When Should a Denture Be Replaced?

There is no specifically agreed-upon chronological answer by dentists to "When should a denture be replaced?" There are instances where dentures have been replaced after 1 year or less, and on the opposite side of the spectrum, there are people who have worn the same dentures for 25 or more years. These ranges obviously are extremes.

However, on average, dentists seem to be replacing dentures somewhere between four to eight years. This would seem to imply that the average denture fabricated from contemporary biomaterials will wear out and deteriorate within that time and/or the average denture patient's jaws have changed so much that a new denture must be redone.

Each individual's denture needs are different. There are some factors that a licensed dentist takes into consideration when evaluating the need to replace dentures.

Denture Longevity Considerations

Lost vertical dimension:

The proper linear distance relationship between the upper and lower jaws is called vertical dimension. This is unique for each individual.

As one's jaw changes and the ridges upon which dentures rest shrink, a denture becomes loose and vertical dimension begins to change (the vertical dimension is said to be lost by a certain linear measurement unit such as millimeters). Additional plastic (acrylic resin) is added to the inside of a loosening denture (called relining a denture) to stabilize it by reducing looseness caused from jaw shrinkage. However, relining does not restore vertical dimension in an accurate way.

The current position held by most dentists is that when vertical dimension has been lost by three millimeters or more, a new denture should be fabricated in order to restore vertical dimension and maintain functional health.

There are individuals who have worn the same denture for extended periods with considerable loss of vertical dimension over time. Since vertical dimension loss is a slow, but nevertheless progressive, process, they have gradually adapted to a continually increasing closed bite position. These individuals often have a sunken facial appearance and usually appear much older than their chronological age.

Functioning with an abnormal vertical dimension may eventually result in alterations of the temporomandibular joints (TMJ, the jaw joint located in front of the ears). This can lead to significant pain and difficulty with effective eating and even the jaw motions involved with speech. It frequently becomes quite difficult, if not impossible, to restore such individual's proper vertical dimension and chewing efficiency by relining and repairing this older denture.

Tooth wear:

Aside from impaired ability to chew effectively, excess tooth wear will adversely affect esthetics and cause other problems associated with lost vertical dimension, as described above. While porcelain denture teeth will wear at a slower rate than plastic teeth, they nevertheless will wear and are more susceptible to chipping and cracking. Multiple cracked teeth will need to be replaced.

Deterioration: While the biomaterials used by dentists to fabricate dentures today are quite durable, they still deteriorate and exhibit dimensional change over time -- no longer fitting properly, even after relining.

Aging plastic looses its natural appearance and texture, and coloration fades, making dentures look quite artificial.

Deteriorating plastic also makes it easier for dentures to become excessively contaminated with microorganisms. This contributes to mouth irritation and bad taste, and socially unacceptable odors will develop that no amount of denture cleaning will seem to eliminate.

Keeping regular dental check-ups with your dentist so that one's dentures, soft tissues, and jawbone may be checked is essential to extending the life of a denture and maintaining oral health.

by Joseph J. Massad, D.D.S.

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.