Fixed Bridges
What is a bridge?A bridge is a dental appliance that replaces one or more natural missing teeth, thereby "bridging" the space between two teeth. Fixed bridges are cemented into place next to the "abutment" teeth--the surrounding teeth on either side of the space, or "span." Unlike removable partial dentures, fixed bridges cannot be taken out of the mouth by the patient.
A fixed bridge is a device that typically consists of three units--a pontic (a false tooth) fused between two crowns that are cemented onto the abutment teeth.
Who should get a bridge?
If you are missing any teeth and are committed to maintaining good oral hygiene practices, you
may be a good candidate for a bridge. A bridge is the most natural choice to fill the space in
your mouth left by missing teeth. If left unfilled, this space can cause the surrounding teeth to
drift out of position and can cause teeth and gums to become more susceptible to tooth decay
and gum disease that can cause further tooth loss. Fixed bridges not only correct an altered bite,
improve your chewing ability and speech, but they also safeguard your appearance by preventing
the collapse of your facial features that can cause premature wrinkles and age lines.
What type of bridges are there?
Besides traditional bridges, another popular design is the resin bonded or "Maryland" bridge,
primarily used for the front teeth. This is usually the most economical choice when the
abutment teeth are healthy and don't contain large fillings. The pontic is fused to metal bands
that can be bonded to the abutment teeth with a resin cement and hidden from view, reducing the
amount of preparation on the adjacent teeth.
A cantilever bridge may be used if there are teeth on only one side of the span. This involves anchoring the pontic to one side over one or more natural, adjacent teeth. If there are no adjacent teeth to act as anchors, your dentist may recommend an implant--a metal post that is surgically imbedded into the bone and capped with a crown as an abutment. In some cases where the span is large, your dentist may recommend a removable partial denture or even an implant-supported prosthesis.
What procedures are involved?
For a traditional fixed bridge, the first appointment consists of the dentist reducing the adjacent
abutment teeth that will act as anchors. Impressions are made, from which a metal framework,
including the pontic, is created. By the second appointment, the final bridge is fitted over the
teeth.
The total treatment time is usually between two or four weeks, depending on the type of bridge. However, because it is often difficult to match the natural shade of your teeth, the treatment time may be longer.
How do I care for a bridge?
With a bridge, it is more important than ever to brush, floss and see your dentist regularly. If
you do not control the buildup of food debris and plaque--the sticky film of bacteria formed
from food acids--your teeth and gums can become infected, requiring further treatment and
resulting in possible loss of the bridge. Your dentist may also recommend using floss threaders
that help remove bacteria from hard to reach spaces between the bridge and adjacent teeth and
gums.
If you maintain optimal oral hygiene care, you can expect your fixed bridge to last as many as 8-10 years, or even longer.
Sources:
Robert Margolin, DDS, FAGD;
"An Update on Conventional Fixed Bridges Part 1: Patient Assessment and Selection," by D.L. Gutteridge, et al., Dental Update, April 1994;
Inlays, Crowns and Bridges, by Leslie C. Howe, et. al., Butterworth-Heinemaann Ltd., 1993;
"Crown and Bridge Procedures: Success Begins with Home Care," GP, Dec. 1992;
Change Your Smile, by Ronald E. Goldstein, DDS, Quintessence Publishing Co., Inc., 1988;
"Fixed Bridges and Crowns," American Dental Association, 1985.
