Implant Crowns

Evolution of Tooth Implants

Dental implantology has made huge strides in just the past 20 years - but the concept is anything but new.

The idea of a tooth replacement anchored permanently into the jaw has been around since antiquity. Archeologists know the ancient Egyptians tried to implant precious stones into the jawbone where teeth were lost. Half a world away, Mayan ruins in Mexico turned up jawbones with tooth implants carved from seashells.

Tooth loss is one of humankind's most common afflictions - and permanent replacement one of dentistry's fondest dreams. If you have a missing tooth or teeth, you probably understand why.

Fast-forward now from the Third Dynasty to today's dental research labs. Three major research advances - all in the past 15 years - combined to make dental implants practical and workable in a wide range of patients.

Tooth implants substitute the rooting of 32 individual teeth with a few metal anchor posts onto which snaps either an overdenture or a fixed bridge. Investigators found that posts made of the metal titanium were strong, non-toxic over years in the mouth, and biologically compatible.

The next critical discovery was the concept of "osseointegration" - in which the healing jawbone actually grows into the dental implant post. This union is capable of sealing harmful bacteria out of the bone tissue.

Credit the computer revolution with the final critical breakthrough: Computerized Tomography (CT) can be used to develop a model of the jawbone's surface. This eliminates the need for preliminary surgery required to make impressions of the jawbone. For certain patients CT imaging can make tooth implant surgery a one-step procedure.

Teeth implants aren't for everybody. But research technicians have expanded its potential beyond the dreams of - well, certainly Ramses II.

Implant Dentistry Gives You Better Fitting Denture Implants

The art and science of implant dentistry has advanced rapidly during recent years and new techniques and materials have greatly improved our ability to replace missing tissues with functional and natural-looking artificial prostheses called dentures implants. However, it must be remembered from the outset that no prosthesis or artificial substitute will ever function as well as the original living tissues. Research has shown that the chewing efficiency of experienced denture patients is, at best, less than 20% as efficient as the average chewing efficiency of patients with natural teeth.

Why Is the Lower Complete Denture So Hard to Wear?

Both upper and lower dentures are retained in the mouth by an intimately close fit of the plastic denture base to the gums. The intimately close fit is achieved by a combination of muscle control and suction. Mastering the function of the lower denture is more difficult than learning to use an upper complete denture. By comparison, the lower denture has less stable tissue with which to rest on than the upper denture. The lower denture stays in place largely due to the ability of the denture wearer to control their tongue well enough to hold the denture down while they speak and chew. Therefore, lack of tongue coordination in a lower complete denture wearer can severely affect the patient's ability to wear a lower complete denture.

Bone Loss and Complete Dentures

For various reasons, teeth have to be removed. After tooth removal, the residual bone that is used to support the teeth will then shrink away quite rapidly over the first year because the body knows that the residual bone is no longer needed. The greatest amount of shrinkage occurs during the first year after tooth removal. Research has shown that wearing dentures will accelerate jawbone shrinkage. As the shrinkage of the jawbone support progresses over time, new dentures will need to be fabricated in approximately six to ten years. Because each denture wearer is unique, sometimes the internal surface of the denture needs to be readapted to the gum tissues. This procedure is called a reline.

Lower Complete Dentures and Denture Implants

Some patients are never able to adapt to functioning day-to-day with their complete dentures. Many of these patients do not have adequate bone to stabilize a lower denture. Others never develop enough muscle coordination to learn to chew with their dentures. For many years, dentistry had nothing more to offer patients other than a denture adhesive. Today, such problems can often be managed through the use of implant dentistry. Even with as few as two dental implants, the retention and stability of a lower denture can be greatly increased with denture implants. In fact, the chewing efficiency can also be greatly increased. Some patients have estimated that they regained up to 70% of their original chewing capacity. Overall, patients feel more confident when they are in public because they no longer fear that their dentures will slip or cause them embarrassment with denture implants.

By Benjamin O. Watkins, III, DDS

+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.