The crown of a tooth is the visible part above your gums.
If your dentist tells you "Your tooth needs a crown," he means that your
natural tooth needs a laboratory-made, prosthetic crown. Prosthetic
crowns are made of metal, porcelain fused to metal substrates, or new
all-white restorative materials. A prosthetic crown covers all or part
of a tooth and holds a tooth together. Crowns are the treatment of
choice whenever decay, a crack,a fracture,previously placed large
filling ,or a root-canal filling have compromised the strength of a
tooth.
Crown restorations require a minimum of two appointments to complete.
The tooth is numbed and prepared for the crown by removing any decay or
weakened areas. The remaining tooth structure is then reshaped to meet
proper crown preparation design. If necessary, a restorative material,
usually a composite resin, is added to the remaining tooth structure to
ensure that the prosthetic crown will have a good foundation. This
procedure is called a "build-up." After the tooth is prepared, an
impression is taken, a model prepared and sent to the dental lab,
where the crown is fabricated to our specifications.Please ensure that a
proper shade to which your teeth match is noted and also sent to the
dental lab. A temporary crown made of acrylic is immidiately prepared
and placed on your tooth till the time you get a proper crown from the
dental lab.
During the second appointment,the new crown is placed on the tooth.
Adjustments may be required to exact the perfect fit, so that the crown
will feel comfortable in the mouth and will confirm to the bite. When
the crown fits seamlessly and contacts the neighboring teeth correctly,
the crown is cemented on the tooth.
The finished crown will protect the tooth, function harmoniously in the
mouth, and enhance the appearance. However, as with all dental
restorations, proper oral hygiene is essential to protect the crown.
Crowns, veneers, and composite resin restorations must all be kept clean
with daily brushing and flossing. In order to make the restoration
sucessful regular Dental check up and Hygiene maintaince are
essential. A personal hygiene schedule, to maintain your healthy smile
can be designed by the Dentist.
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A BRIDGE is a fixed partial denture. of one or more
missing teeth which cannot be readily removed by the patient or the
dentist, it is permanently attached to the adjoining teeth which furnish
primary support to the appliance. To use it, however, we must "file"
down the teeth on each side to let it the dummy tooth/teeth hold on to
something. The extra tooth/teeth connect/s to both of the filed down
teeth. We use a cement (or luting agent) to hold it in place and create a
good seal. The bridge can be made of either vitallium(non-precious
white metal), porcelain fused to metal, the new ceramo
composites(Targis/Vectris) or precious metal. The porcelain obviously
looks much more natural and is the strongest.
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| BRIDGES - FREQUENTLY ASKED QUESTIONS
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- 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.
Bridges are cemented into place on the "abutment" teeth--the surrounding
teeth on either side of the space or span. Unlike removable partial
dentures,bridges cannot be taken out of the mouth by the patient.
A 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?
- Any person with missing teeth and committed to maintaining
good oral hygiene is a good candidate for a bridge. A bridge is the most
natural choice to fill the space in the 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. Bridges
not only correct an altered bite, improve the chewing ability and
speech, but they also safeguard the appearance by preventing the
collapse of 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 (gap)s. 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,an implant is recommended--a metal post that is surgically
embedded into the bone and capped with a crown as an abutment. In some
cases where the span is large, a removable partial denture is
recommended or even an implant-supported prosthesis.
- Is it essential to have a temporary bridge before the actual bridge is fixed?
- If the time duration between the grinding of adjoining teeth
and fixing the final bridge is too much than a temporary acrylic bridge
should be prepared and fixed.Otherwise thepatient may feel sensation
hot and cold and may feel uncomfortable till the time the actual bridge
is fixed.
- What is the procedure of its fabrication?
- 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.In the second appointment, the final bridge is
fitted over the teeth. The total treatment time is usually around one
week, 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.
- Care taken for a bridge?
- With a bridge, it is more important than ever to brush, floss
and see the dentist regularly. If buildup of food debris and plaque -the
sticky film of bacteria formed from food acids-is not controlled, the
teeth and gums can become infected, requiring further treatment and
resulting in possible loss of the bridge.We recommend using floss
threaders that help remove bacteria from hard to reach spaces between
the bridge and adjacent teeth and gums. If optimal oral hygiene care is
maintained,a bridge can last for many years.
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