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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.

Seniors - Age Brings Changes in Oral Care

It's an indisputable fact -- our bodies change as we get older. These changes take different forms in different people, depending on our inherited physical traits, our lifestyle and nutritional habits, and our medical conditions.

Age brings changes in oral health and dental care, too. There are some specific areas where seniors need to pay close attention to protect and extend their oral health and dental care.

Tooth Color:

Plaque is an invisible layer of bacteria that forms on our teeth, and can trap stains at any age. But as we get older, plaque builds up more quickly and is harder to remove. At the same time, the tissue that lies underneath the tooth enamel, called "dentin," is changing, and those changes can make teeth appear darker. Finally, decades of consuming coffee, tea, or tobacco leave stains that build up over time.

Daily brushing and flossing are important, particularly first thing in the morning and just before bed, to combat the plaque that builds up overnight. You may also want to consult your dentist about using commercial dental care rinses that remove plaque.

Dry Mouth:

Many seniors experience a reduced flow of saliva, sometimes as a side effect of medications such as painkillers or decongestants. For some, the lack of moisture inside the mouth can lead to sore throats, a burning sensation, hoarseness, or difficulty swallowing. In addition, if you leave dry mouth unattended, it can damage teeth, since saliva's natural rinsing keeps bacteria washed away from teeth and gums. Sugar-free chewing gum and hard candy will stimulate natural saliva, and artificial saliva and oral rinses will provide much-needed relief. Ask your dentist which commercial dental care products are the best for you.

Cavities:

If your gums begin to recede, the portion of the tooth that used to be below the gum line is now exposed. Roots are softer than tooth surfaces and are susceptible to decay; they are also likely to be sensitive to hot and cold beverages and food. Most people over age 50 suffer from some form of dental disease. Make sure you take good care of teeth and gums with daily brushing and flossing. A word of caution: your gums may be starting to thin. Brush thoroughly but gently to keep from tearing your gums.

Fillings:

Your fillings are getting older, too. They can weaken or crack, or your tooth may decay around the edges of the filling. As a result, bacteria can seep into your tooth, causing more decay. Regular check-ups will give your dentist the chance to keep an eye on your existing fillings.

Gum Disease:

Daily cleaning and good nutrition are critical for healthy gums. When gums become infected and diseased, they set off a chain reaction that can result in losing teeth or weakening the jawbone. Either condition creates more problems for your health and increases your medical costs. Contact your dentist if your gums become red or begin to bleed.

Good Nutrition:

What you put into your mouth has a direct impact on the health of your mouth -- and the health of the rest of your body. As you age and your lifestyle changes, keep your nutritional goals in mind. Balanced meals are one the best ways you can contribute to your own good health.

Regular Exams:

The dentist will check your mouth, teeth, and jaw for any problems. You should also mention any sores, swelling, or pain you might be experiencing. Regular checkups enable the dentist to spot problems early. Early resolution of problems will help you keep your natural teeth.

Good dental care, regular check-ups, and good nutrition are the keys to really keep you smiling in your golden years!

+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.