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When
teeth are missing the most popular way of restoring them
is the bridge. A bridge is comprised of
crowns on existing teeth and pontics in place of the missing
teeth. Bridges are both strong and asthetic.
Crowns
replace teeth that are badly decayed, broken, missing or
discolored. Crowns and Bridgework are not removable like
complete or partial dentures. They are cemented in the mouth by your
dentist. Crowns may be made of gold or silver alloys.
Some are all metal, some have porcelain baked onto the
metal, some are all porcelain, and others are made of
composite material. To make a crown your dentist reduces
the size of the tooth needing a crown using specialized
instruments. (The new crown will fit right over the old
tooth.) An impression is taken along with a
representation of how your upper and lower jaws come
together. |
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color (shade) for porcelain crowns and bridges will also
be determined by matching your remaining natural teeth.
The shade, impression and bite registration are sent to
the dental laboratory for a crown to be made. A model
(mold) is made from the impression. A wax representation
of the metal portion of the crown is carved by hand. The
"lost wax" technique is used to process the wax
into metal. During this process the wax is melted away
and heated metal is placed where the wax once was. After the metal crown is finished, if the crown is to be just metal, it is ready to go to the dentist and placed in the patient's mouth. If the crown is to have porcelain placed on it may have layers of powdered porcelain baked on before it is sent to the dentist. Sometimes a "try-in" of the metal part without porcelain on it may be done to check for any necessary adjustments. Once any final adjustments are made to the completed crown, your dentist will cement the crown in place. All-porcelain crowns are made by layering powdered porcelains which are baked in an oven to fuse the porcelain together. These completed crowns are also cemented in place by your dentist. How to Care for Your Crown or Bridge
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IMPORTANT:
Don't try to adjust or refit your crown yourself. Always contact
your dentist
immediately if there is any change in the comfort of your crown.
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