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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.

Denture Problems

Are you a denture wearer who's afraid to be seen in public because your dentures are unattractive? Do you find yourself eating alone because you can't eat foods your friends eat? Do you carry your false teeth in your pocket? Denture wearers, without knowing it, can become dental "shut-ins." They begin, subtly, to reorient their lifestyles around ill-fitting or loose dentures. When dentures don't look or function properly, some people withdraw from their social lives and suffer depression and diminished self-esteem. Some even become recluses.

Tale of a shut-in

One denturist had a patient, a truck driver, who couldn't eat properly with his cheap dentures. At truck stops, he would take his food back to his truck and eat alone. He gave up his only social activity on the road, swapping stories with other drivers over a meal. For two years, he was a prisoner in his own truck. Many people can reverse a situation like this though. When prosthodontics look and feel right, denture problems become a thing of the past and the wearer's whole mental outlook can brighten. Eating gives pleasure and a feeling of security learned from early feeding experiences. It's an important part of most social occasions. When a person controls the quality and quantity of his food, he's able to achieve this sense of security and a feeling of self-esteem.

So, let's start fresh with some denture tips.

There's no need to feel unattractive or live in fear of a false teeth faux pas in the company of friends and family. A prosthodontist can help you regain function, comfort, and a natural appearance by denture care and repair, or by just replacing or refitting them. Or, it might just mean using better dentures adhesive. Well-fitting prosthodontics are a small sort of miracle, but one that works wonders for your self-esteem. Don't be a shut-in. Call your dentist, and start smiling again.

+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.