The cement color used for your permanent crown must be the same as used for your temporary crown as the color of the cement does affect the overall color of a porcelain crown.
When you return for your second appointment the permanent crown will be cemented onto your tooth. The crown should last for ten to fifteen years.
The placement of a crown can usually be completed with only two appointments. However, it is possible that your tooth may require a preliminary restoration. In order to stabilize your tooth, a filling will be put in place prior to placing a crown due to the loss of original tooth structure.
Here is a breakdown of the entire procedure.
1) The initial dental crown appointment.
A) Your dentist will numb your tooth.
B) Your dentist will shape your tooth.
C) Your dentist will make an impression of your tooth.
D) A temporary dental crown will be made for your tooth.
E) Your dentist will select the proper shade of porcelain needed for your dental crown.
2) Your second dental crown appointment
A) permanent crown is cemented in place.
Dental Crowns made of Resin and Porcelain
The new reinforced resin or bonded all-porcelain type of dental crowns has the most natural appearance as the color is specifically chosen to match the color of your teeth. They can be made from pure ceramic or a new reinforced composite resin, and as they are almost indistinguishable from natural teeth they are used primarily for front teeth. Unsurprisingly, more and more patients are also requesting them for other areas of the mouth. They are bonded using material which is metal-free which is of great benefit to patients with metal sensitivities.
There are basically two types of porcelain. The felspathic type is the original method that has been around for 20 years. Porcelain is baked onto tin foil and then heated in an oven after which a ceramist is able to create tints and opaques inside the porcelain and produce an extremely natural looking dental crowns. The other method is pressed ceramic porcelain which is created from single ingot. This is milled in one piece to create the required shape. Stains and opaques are applied only to the surface of the porcelain.
Advantages of resin and porcelain crowns :
- Porcelain crowns are undoubtedly the most esthetically pleasing, as their color is specifically chosen to match your natural teeth.
- They are metal free.
Disadvantages of resin and porcelain crowns :
- It is necessary to remove more tooth structure because of the thickness of the porcelain.
- The thickness of the porcelain also means it is more difficult to get an ideal fit where your gum meets the crown.
- Gingival inflammation appears to be more common with porcelain crowns than gold crowns.
- Porcelain crowns require a higher skill level from your dentist
Dental Crowns Made of Gold
Gold crowns are often the preferred choice when the patient is not overly concerned about their appearance. Gold is extremely pliable making gold crowns a better fit than any other type. The strength and durability of the gold offers a more solid crown that will not chip or crack, which is possible with other types of crown. Gold crowns are normally used in molars, where the forces from chewing and grinding are most prevalent
Advantages of gold crowns :
- It is easier to prepare a tooth for a gold crown as there is minimal tooth structure removal and more of the original tooth remains intact.
- Gold is less likely to cause wear on opposing teeth.
- Gold is more pliable and offers a better fit.
- Of all the crowns gold offers the healthiest environment for the gum tissue.
Disadvantages of gold crowns:
- Gold is not seen as being cosmetically pleasing
Dental Crowns made of Porcelain and Metal
Porcelain fused to metal crowns offer a natural appearance with a better fit than a standard porcelain crown. On the down side they have a metal substructure making it difficult to replicate the translucency of natural teeth. It is possible that a darker line will appear at the edge of the crown, near the gum, as it recedes with age. Advantages of porcelain and metal crowns:
- Porcelain fused-to-metal crowns offer a very natural look.
- They fit to the tooth very well. Disadvantages of porcelain and metal crowns:
- They have a metal substructure and require an opaque below the porcelain.
- In time, a darker line may be visible at the edge of the crown.
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