Overview of Dental Crowns
A Dental Crown is a “cap” that is tooth-shaped and it is placed over a tooth in order to cover the tooth for restore of its shape, size, strength, improve its appearance and to protect the teeth. The Dental Crown completely caps or encircles a tooth or dental implant. When a large cavity threatens the ongoing health of a tooth, Dental Crowns are often considered necessary. Dental Crowns are typically bonded to the tooth using dental cement.
Types of Dental Crown
Dental Crown can be made out of metal (gold, metal alloy), ceramic (such as porcelain), or a combination of both. Each type has its own unique advantages and disadvantages that must be taken into consideration when making a decision about which makes the best choice for your situation.
- Gold / All-Metal Dental Crowns.
Full Gold Crowns (FGCs) consist totally of a single piece of alloy. Although referred to as a gold crown, this type of crown is actually composed of many different types of elements, including but not limited to gold, platinum, palladium, silver, copper and tin. The first three elements listed are noble metals, while the last three listed are base metals. Full gold crowns are of better quality when they are high in noble content. Advantages of FGCs are as follows:-
- Gold / All-Metal Dental Crowns can aid a dentist in achieving a very precise crown-to-tooth fit.
- Gold / All-Metal Dental Crowns are very strong and can be expected to withstand even the heaviest biting and chewing forces well. They will not chip.
- Gold Crown Dental Crowns will not create excessive wear on the teeth that oppose it (the teeth that it bites against).
- Porcelain / All-Ceramic Dental Crowns.
Conventional Porcelain Jacket Crown (PJCs) is the oldest type of tooth colored crown and it consists of 1 to 2 mm thick of porcelain. PJC is relatively brittle but after it is cemented, it requires same amount of force to fracture our tooth enamel. Many types of stronger crowns have been developed in order to overcome the brittleness of PJCs. Zirconia Cores is another type of all ceramic crowns. Zirconia is a very strong material but it is dense white and required thick layers of porcelain underneath to mask the opacity of zirconia. Ceramic Crowns can be the most cosmetically pleasing of all of the different types of dental crowns.
- Porcelain fused-to-metal Dental Crowns.
Porcelain-Fused-to-Metal Dental Crowns (PFMS) have a metal shell on which is fused a veneer of porcelain in a high heat oven. The metal provides strong compression and tensile strength, and the porcelain gives the crown a white tooth-like appearance, suitable for front teeth restorations. These crowns are often made with a partial veneer that covers only the aspects of the crown that is visible. The remaining surfaces of the crown are bare metal. Metal ceramic crowns are also most costly and the laboratory time to construct is longer. These crowns are strong enough to withstand heavy biting pressures and at the same time can have an excellent cosmetic appearance. Disadvantage of PFM is that it is possible that the porcelain on a PFM crown will chip or break off. It is very difficult to make a lasting repair. The most predictable solution is typically making a new crown.
- Dentist Buckhead: How much do Veneers Cost? (therightsmile.wordpress.com)