Dentists recommend crowns in the following cases:
1) To save a weak tooth from breaking or to put together all parts of a broken tooth;
2) To recuperate an already broken tooth or a tooth that has been very worn out ;
3) To wrap a tooth up with a big hole when there is a little of tooth present;
4) To set a dental bridge in place;
5) To coat misshaped or very stained teeth;
6) To face a dental implant. Polishing of a tooth has need of taking away a part of a tooth to make area for the crown. But dentists often avoid it as a cosmetic method because the healthy teeth are upset.
Crowns strengthen teeth by pairing the sides of the damaged tooth together, as a splint grip together a broken bone. Big holes can occupy over a third part of the tooth and deteriorate that tooth with time. Crowns are not used in cases when the damaged teeth are about to break.
The "capping" procedure performs under anesthetic, at the same time the crown is approximately two millimeters thick. So the dentist must cut off this amount off your genuine tooth to prevent increasing of its size. Then the dentist will make a duplicate of your tooth, which will be a putty sample. Afterwards this mold is sent to a laboratory, where on it base will be made a crown. If you want a porcelain crown, the dentist will select a color close to the color of the surrounding teeth. After about two weeks, you’re crown will be absolutely built-in. If you are pleased with the "look and feel" of the crown it will be covered over your original tooth.
Types of Crown Materials
Permanent crowns can be made from all metal: porcelain-fused-to-metal, all-resin or all-ceramic.
Metals used in crowns contain gold alloy, other alloys (palladium) or a base-metal alloy (nickel or chromium).Comparatively with other types of crowns, in metal crowns less tooth structure is removed and tooth wear to opposite teeth is kept to a minimum. Metal crowns resist biting and chewing forces well and almost certainly last the longest in terms of wear down. Moreover, they seldom chip or break. The metallic color is the main negative aspect. Largely, metal crowns are a good choice for out-of-sight molars.
Porcelain-fused-to-metal dental crowns, unlike the metallic crowns, can be matched by color to your nearby teeth. However, more wearing to the opposing teeth takes place with this crown type, compared with metal or resin crowns. The crown's porcelain section can also chip or break off. Next to all-ceramic crowns, porcelain-fused-to-metal crowns look most resembling to normal teeth. Nevertheless, sometimes the metal underlying the crown's porcelain can show through as a dark line, especially at the gum line and even more if your gums retreat. These crowns can be a good alternative for front or back teeth.
All-resin dental crowns are less expensive than other crown types. Though, they wear down through the time and are more inclined to crack than porcelain-fused-to-metal crowns.
All-ceramic or all-porcelain dental crowns provide the best natural color match than any other crown type and may be more suitable for people with allergy for metal. However, they are not as strong as porcelain-fused-to-metal crowns and they wear down opposing teeth a little more than metal or resin crowns. All-ceramic crowns are a good choice for front teeth.
Temporary opposed to permanent. Temporary crowns can be made in your dentist's office while permanent crowns are made in a dental laboratory. Temporary crowns are made of acrylic or stainless steel and can be used as a short-term reinstallation. Permanent crown in its turn is constructed by the dental laboratory.
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