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CROWN AND BRIDGE
Crowns, also
known as caps, restore damaged teeth and mimics the shape, size and color of the
surrounding teeth. Crowns are indicated for cracked teeth and teeth with deep
cavities; to protect teeth that have been filled by root-canal treatment; to
provide extra support for bridges; and to cover poorly shaped or discolored
teeth. Crowns may be made of metal, porcelain, or newer restorative materials
like metal free ceramics. They are custom-made and fitted for each patient in
conformation with the size and length of the natural teeth. Crowns typically
last five to eight years, but can last much longer with proper oral hygiene.
Crowns can be made of a variety of materials. They can be made of plastic,
ceramic or metal alloys. A combination of metal and ceramic is also possible to
maximize strength and simulate the appearance of natural teeth.
The teeth to be crowned are prepared which involves reduction of the tooth size
(usually under local anaesthesia) followed by an impression or mould of the
prepared tooth. This trimming of the tooth is required to create space for the
crown to be fitted. The mould taken is then sent to a laboratory where skilled
technicians will fabricate the crown. In the meanwhile, a temporary crown is
made and fitted onto the trimmed tooth. They can be made from gold, metal,
porcelain and white (Tooth) colored Zirconium. White crowns can greatly improve
your confidence and smile.
TYPES
Ceramic Fused to Metal Crowns
Porcelain-fused-to-metal
dental crowns are the basic crowns with a metal backing which can be almost color matched to your adjacent teeth (unlike the metallic crowns). However,
over a period of time; the ceramic
overlaying may wear off or the metal underlying the crown’s porcelain can show
through. In the gums it may show through as a dark line. They may be required to
be upgraded or replaced after few years.
All Ceramic crowns
All-ceramic or all-porcelain dental crowns provide better natural color match than any other crown type and may be more suitable for people with metal allergies. All-ceramic crowns are a good choice for front teeth.
Zirconium crowns
Zirconium is the strongest all-ceramic coping material available today. Zirconium is ideal for those who are sensitive to metal or simply prefer the aesthetics of metal-free restorations. Its bio-compatibility has been proven through the years in the medical field.
Zirconium crowns and bridges are so strong they can be used anywhere in the mouth. Zirconium crowns can withstand the biting pressure of the front teeth as well as back teeth grinding. The look of zirconium crowns and bridges is so close to natural teeth that it is hard to tell the difference and it is this quality which makes it very usable within dental work.
HOW CROWN IS BETTER THAN OTHER TOOTH SAVING OPTIONS.?
2.) RCT treated teeth require to be protected by crown.
3.) A crown may hold together parts of a cracked tooth.
4.) It also can be used to hold a bridge in place.
5.) Crowns can be used to improve appearance as well. They may be placed to cover misshapen or badly discolored teeth.
6.) Crowns can be made ahead of time (prefabricated) or made to order in a laboratory. Prefabricated crowns are made of plastic or stainless steel.
7.) They can be used on a temporary basis until a permanent crown is made.
BRIDGES
A bridge is made to replace one or more missing teeth. Bridges can be supported by natural teeth, by a combination of teeth and implants or just by implants.
A traditional bridge is made by creating
a crown for each tooth on both sides of the space and placing a false tooth
between the crowns. The crowns can be supported by natural teeth or by
implants. When the crowns are placed, the false tooth fills the space left by
the missing tooth or teeth. If the teeth receiving the crowns are healthy and strong, they probably will not need root canal therapy. However, parts of the teeth will be removed so the crowns will fit. Traditional bridges are made either of porcelain fused to metal (PFM) or ceramics.
Getting a bridge requires at least two visits: the first to prepare the teeth to be crowned and make impressions, and the second to place the bridge. Bridges last at least five to seven years, often longer. When a patient has one or more natural teeth remaining in the upper or lower arch, a partial denture or fixed bridge can replace the missing teeth. Besides filling the space of missing teeth, partial dentures and bridges also prevent the remaining teeth from moving out of position.
DENTAL BRIDGES
A bridge stabilizes the bite of a patient who is missing one or more teeth.
Bridges prevent the surrounding teeth from moving or shifting in the mouth. A
missing tooth that is not replaced may cause surrounding teeth to become
unstable and require removal, compromising oral health or change the shape of
the face and diminish the beauty of a smile.
Unlike partial dentures, bridges are permanent; patients need not remove them.
The missing tooth is replaced with an artificial tooth connected between two
crowns (caps), which are permanently cemented or bonded on the adjacent teeth.
Bridges can be used to replace a small number of missing teeth if the
neighboring teeth are sufficiently strong. The number of missing teeth,
condition of the neighboring teeth, condition of the supporting gums and bone
are all important factors which need to be assessed prior to making a bridge.