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Crowns are full coverage restorations that are used to cover a tooth that is either likely to break, or is too damaged to be restored with a filling. They are most commonly used after root canal treatment, or when a large filling wears out. Crowns ride over the weakened tooth, providing strength and protecting the tooth against breakage.
Dentures function as a replacement to teeth that have become loose, or have been lost due to bone loss. Once accustomed to the dentures, all the normal functionality and appearance return and one just carries on as usual.
ROOT CANAL TREATMENT
Root canal treatment, also referred to as root canal therapy, or endodontic therapy, is necessary when a cavity reaches all the way to the tooth's pulp. Sometimes, deep restorations or trauma to a tooth may cause the nerve to be damaged, to the point that it needs root canal therapy. Once this occurs, the pulp becomes infected, and can even extend through the root tip and begin to eat away at the surrounding bone. At this point, it must be treated, and cannot heal on its own. Symptoms that the pulp has become infected may include sensitivity to hot/cold, sweet foods, pain, swelling, pain when chewing, pressure, or a bad taste in the mouth. Sometimes, however, no symptoms are apparent and the person is unaware of any problem until a dental exam. A root canal is then performed to clean out the infected tooth pulp, and disinfect the canals of the tooth. The only other treatment would be to extract the tooth. Once the infection is resolved, the canal(s) are filled to prevent any further infection. Usually a core build-up and crown is recommended for restoring a tooth that has had root canal therapy.
This is an option for filling the space created by a missing tooth. It is formed to look like the missing tooth. Bridge work is as much an art as it is an exact science. The materials used may be porcelain, ceramic, or total zirconia. The choice of material depends on requirements for strength, wear, and/or esthetics.
It is important that a missing tooth be replaced, as soon as possible, for several reasons. If not treated, the teeth surrounding the gap begin to shift inward,starting a bad chain reaction. Teeth use their neighbors for support, and, with one missing, they start to "fall". As this worsens, the bite changes in response to the pressure. This can eventually result in problems with the entire jaw, (e.g. TMJ). The surrounding teeth deteriorate and in a matter of time they, too, are lost. Gum disease becomes a serious problem, with the difficulty of treatment increasing as the neglect continues.