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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.

Metal Based Denture vs Plastic - Which is Best for You?

A metal-based denture is one in which a portion of the denture body is made of a substantial metal casting rather than all plastic (acrylic resin). This procedure is usually done on the lower denture.

There are two types of metal-based dentures.

Standard metal-based denture

The metal base portion of the denture is in direct contact with underlying supporting tissues.

The base is fabricated from a special medical grade alloy that is hypoallergenic and very biocompatible with tissues. Generally, tissues in contact with this type of material are very healthy in appearance.

Modified metal-based denture

The metal base portion of the denture is not in direct contact with underlying supporting tissues. A soft or hard plastic liner may be interposed between the metal and supporting tissues.

A soft liner is generally preferred to hard plastic since it is more comfortable to wear; however, the soft liner usually should be replaced on an annual basis.

The Rationale for a Metal-Based Denture

Facilitates the avoidance of disruptive forces

Sometimes it is necessary to construct a very narrow denture in order to avoid any structures that would loosen the prosthesis, such as muscles flexing, and so forth. In addition, necessary surgical procedures to reposition a muscle attachment (called a frenum) can sometimes be avoided with these narrow type dentures.

However, such narrow dentures are weak and tend to break quite easily when fabricated just from plastic. A metal base provides the needed strength to design a very narrow denture in order to follow the confines of a patient's lower resorbed alveolar ridge (the remaining bony ridge). In addition, the metal base provides long-term dimensional stability and strength that is not enjoyed with an all-plastic denture base.

Provides a more natural feeling

The added weight of the metal base provides a more natural perception for many patients. Many patients prefer the additional weight on the lower jaw.

A private study measured the actual weight of cadaver jaw ridges and teeth that would normally be lost after the extraction of teeth and associated natural shrinkage of the jawbones. It was found that the weight of these tissues closely approximated the weight of a metal base. Therefore, it is likely that the more natural feeling perceived by persons wearing metal-based dentures is probably real rather than imagined.

The additional weight of a metal base also contributes to lower denture stability by causing the denture to settle down onto a jaw ridge.

Advantages of Metal-Based Dentures

• Very biocompatible and hypoallergenic with healthy-appearing supporting tissues
• May include a soft liner
• Can be relined easily
• Provides added strength for easily broken narrow dentures
• Facilitates fabrication of stable narrow-based dentures that are designed to avoid contact with disrupting muscle forces
• Sometimes facilitates the avoidance of surgical procedures to reposition frenum
• Patients perceive a more natural feeling from the added weight
• Weight may contribute to additional denture stability
• Dimensionally very stable when compared to all-plastic-based dentures during fabrication and over time

Disadvantages of Metal-Based Dentures

• Generally difficult to reline standard metal-based dentures; modified metal-based dentures (described earlier above) are easier to reline
• More costly to fabricate

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.