Sunday, February 5, 2012
Please upgrade to the latest version of Flash Player.
A crown is a restoration that covers or caps a tooth, restoring it to its normal size and shape while strengthening the tooth and improving appearance. Crowns are necessary when the tooth has broken down to the point where a filling won’t be effective. A crown can be used to hold a cracked tooth together to prevent further damage. Crowns are also used to cover and support a tooth with a large filling that doesn’t leave much tooth left, attach a bridge, protect a weak tooth from breaking, restore a broken tooth, cover a discolored or misshapen tooth, and cover a dental implant.
Before we put in a crown, we first have to prepare your tooth. In doing this, Dr. Sands will remove part of the tooth so the crown can fit in snugly yet comfortably. The area around your tooth will then be numbed throughout the procedure by using a local anesthetic. After the tooth is prepared, Dr. Sands will make an impression of your teeth and gums using a paste or putty which will then be sent to a laboratory so that your crown can be fabricated. The fabrication process can take 2 to 3 weeks. While you are waiting for your crown, a temporary crown will be inserted until your custom crown is created.
There are several different methods of crown restoration, each using a different crown material.
Gold crowns, also known as metal crowns, are made entirely of a metal alloy that can contain several elements including but not limited to gold, platinum, palladium, and others. Compared with other crown types, less tooth structure needs to be removed with metal crowns. They withstand biting and chewing forces well and rarely chip or break. The biggest drawback of metal crowns is the metallic color.
Porcelain-fused-to-metal (PFM) crowns are another option and can be color matched to your adjacent teeth. However, PFM crowns tend to wear down opposing teeth more than metal crowns. The crown’s porcelain portion can also chip or break. Next to all-ceramic crowns, porcelain-fused-to-metal crowns look most like normal teeth. The largest cosmetic drawback is that the metal underlying the crown’s porcelain can create a dark line.
All-resin crowns are the least expensive type of crown. However, they are more prone to chips and fractures than others crowns and tend to wear down over time.
All-ceramic or all-porcelain crowns provide the best natural color of all the crowns. They are not as strong as PFM and gold crowns and they may wear down opposing teeth more than metal or resin crowns. They are, however, the most cosmetically pleasing and are usually used for the front teeth which are more visible.
If the crowned tooth still has a nerve in it, you may experience increased sensitivity immediately after the procedure. Using a toothpaste designed for sensitive teeth may be recommended in this case. Pain or sensitivity that occurs from biting down usually means that the crown may be too high on the tooth. If this is the case, call Dr. Sands and he will be able to fix the problem. Crowns made of porcelain may chip, in which case resin can be used to repair the remaining crown. If the chipping is extensive, the entire crown may need to be replaced.
A crown can sometimes become loose when the cement washes out from underneath. This may also allow bacteria to leak in and cause decay. If your crown feels loose, you should contact our office. In worse cases a crown may fall off entirely. You can replace the crown temporarily using dental adhesive or temporary tooth cement that is sold in stores for this specific purpose. If this happens, contact Dr. Sands immediately so he can walk you through the proper maintenance of your teeth and crown until you are able to see him. The crown may be able to be replaced; if not, a new crown will be made.
Bridges are natural-looking replacements for teeth which help maintain facial structure, reduce stress on the jaw and fill in the gaps caused by missing teeth. Fixed bridges are cemented to the existing teeth and do not come out. Removable bridges can be taken out.
A dental bridge can be used to:
There are three main types of bridges:
The first step in creating a dental bridge is to prepare the teeth adjacent to the bridge. This involves restructuring the adjacent teeth by removing a portion of enamel, allowing room for a crown to be placed over them. Next, impressions of your teeth are made, which will be sent to a laboratory in order to fabricate the bridge, pontic, and crowns. This may take up to 3 weeks. While your bridge is being fabricated, you will have a temporary bridge placed to protect your exposed teeth and gums. On your next visit, your temporary bridge will be removed and replaced with the new permanent bridge. Dr. Sands will make sure the bridge fits properly prior to adhering it to your teeth.
With good oral hygiene, you can expect your bridge to last from 5 to 15 years, sometimes longer. Replacing missing teeth should make eating easier, but until you become accustomed to the bridge, we recommend you eat soft food cut into small pieces. You will also start noticing a difference when you speak, as your speech will become clearer. For a few weeks after the treatment, it is common to experience increased sensitivity to extreme temperatures. Also, you must remember to practice proper oral hygiene to prevent build up of bacteria on your teeth and gums.
For more information on Crowns & Bridges, contact us.