Crowns can be custom stained, shaped, etc. They can look however you want them to look. Something to think about is that if you get a porcelain and metal crown, eventually the metal may start to show at the gum lines (if your gums recede a bit) This problem can be avoided with a totally porcelain crown. Dont forget that custom staining in the lighting of a laboratory cannot truly mimic the light conditions of the human mouth. plus when a doctor takes a shade make sure it is done as soon as you are seated, teath will dry out during the crown preparation. In regards to a porcelain and metal to a all porcelain there are more factors than just showing a "dark halo" @ the gums, ultimitely u must consider biting force. Is the restoration necisary for the reason of a worn tooth ? Is it just decay? Or is it cosmetic? With a strong biting force the doctor must reduce more tooth area to give room for a thicker restoration. porc/metal restorations are much stronger in comparision to all porc. but you may have the halo effect or discoloration at the tissue from the metal "tatooing" . good way to eliminate this problem is to go with a 99% gold metal and all porc. to the margin of the prepared tooth. With the 99% gold under the porc. the color of the tooth takes on dramatic changes and will have a better match with surrounding teeth.
Yes they do and they are "caps" (crowns are for the molars.) I just spent $12,000 on my teeth and had the front ones capped as well as the bottom front and the rest bonded. You can't tell they aren't your real teeth. Remember, even though the teeth are capped you have to go in for dental check-ups because you can still get cavities.
Porcelain-fused-to-metal crowns are not ideal for front teeth because they do not have the same esthetics as natural teeth (the metal on the inside, which is added for strength, does not allow light to pass through the crown like it would on a natural tooth, so these crowns look more opaque). Also, as the gums recede, you may see the edge of where the crown meets the tooth, and a black metal line may appear. All ceramic (porcelain) crowns are great for front teeth, because you can get really good esthetics. However, they are not as strong as natural teeth. So if you tend to grind your teeth, you may break the porcelain. A new kind of metal, Zicronia, is white, so you don't get the same problems as with the metal in typical PFM crowns. Emax and Lava are two types of zirconia crowns that are very nice looking.
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