서울치과 Dental crowns help to improve the cosmetic appearance of teeth and protect them from future damage. They also prevent more serious problems like infection and further decay.
Crowns can be made from a range of materials. The luminous porcelain of Feldspathic crowns offers the most natural look, and can be bonded directly to the tooth (which transmits the underlying tooth color), or layered over a metal substructure like Zirconia.
Metal Crowns
Dental crowns are tooth-shaped “caps” that completely encase the surface of a damaged tooth to restore its strength and appearance. There are two primary types of crowns: porcelain and metal (often with a porcelain overlay fused to the metal). The best type of crown for you depends on where it will be placed, your preference in aesthetics, and your budget.
Metal crowns are the oldest and strongest type of crown, and are typically used to restore molars in the back of your mouth. They require less filing of the existing teeth before placement and are very durable, withstanding biting and chewing forces without breaking. They also have excellent resistance to corrosion, so they don’t wear down or corrode adjacent natural teeth like other types of crowns can. Metal crowns are also the least expensive type of crown, making them a good choice for patients with budget limitations.
A metal crown can be made from one of several different metallic alloys, all of which have their own advantages and disadvantages. The highest quality of metal crowns are known as ‘high noble’ alloys, which contain at least 25 percent precious metals such as gold, silver, and palladium. High noble alloys have a higher biocompatibility rating than non-precious metal alloys and are therefore less likely to cause allergic reactions in some patients.
Another 서울치과 common type of metal crown is a ‘base metal’ alloy, which is a combination of metals such as nickel, cobalt, and chromium. Base metal crowns are a more affordable option than pure gold crowns, but are still stronger and more durable than non-metallic crowns. They also tend to have a lower biocompatibility rating than noble metals, so they may be more likely to cause allergic reactions in some patients.
While they aren’t as aesthetically pleasing as porcelain crowns, these types of crowns are an effective solution for many patients. They are extremely durable and can last for decades, so they are a good option for patients who have a habit of grinding or clenching their teeth. The main drawback of these crowns is their metallic appearance, which can be unattractive in some cases.
These crowns are typically a good choice for children who have broken a front tooth, or who have extensive decay that can’t be treated with a filling. They are also often recommended for patients who grind or clench their teeth because they can help prevent damage to the underlying teeth and jaw joints. Unlike other crown types, a porcelain bonded to metal crown requires more preparation of the existing tooth, and can be more expensive than other options. VC Dental offers both porcelain CAD/CAM and monolithic CAD/CAM milled crowns, so we can accommodate most patients’ needs regardless of their budget or schedule.
All-Porcelain Crowns
Crowns can be a great treatment for severe tooth decay, broken teeth, damaged or missing teeth. They can also protect a root canal treated tooth or help save a damaged tooth that might need to be extracted.
There are many different types of dental crowns available to suit patients needs and budget. Two of the most common are porcelain crowns and metal crowns (often with a porcelain overlay fused to the metal).
Metal crowns are made from a variety of alloys including gold, cobalt-chromium, nickel-chromium and a range of other metallic alloys. Metal crowns are exceptionally strong and they hold up well to biting and chewing forces. They are the least likely to chip or break and they bond very well to the natural tooth, often requiring less of the original natural tooth structure to be removed for the crown to fit.
Ceramic or all-porcelain crowns are typically made from feldspathic porcelain which offers a translucent appearance similar to the natural tooth enamel. They can be bonded directly to the natural tooth surface which allows the underlying teeth colour to transmit through the porcelain or they can be layered over a pre-built core for a more aesthetically pleasing and longer lasting restoration. The core is traditionally built using a non-noble zirconia but they can be produced with a softer alloy of lithium disilicate or even a harder, more durable ceramic called E -Max.
A crown that has been fabricated on the CAD/CAM machine at your dentists surgery combines all of the benefits of the ceramic all-porcelain crowns with the strength and longevity of the metal PFM crowns. The core of the crown is constructed from a solid block of zirconia and standard transparent porcelain is bonded over it. Porcelain fused to metal crowns are more long-lasting than porcelain only crowns as they are less susceptible to fracture or chipping. They are ideal for the back teeth and are referred to as a PFM or VMK crown.
A monolithic ceramic crown is a newer type of all-porcelain crown that can be fabricated on a CAD/CAM machine at your dentists’ surgery and cemented in one appointment. The ceramic is created from a block of lithium disilicate glass ceramic which is very light and strong with good translucency properties. This type of crown can be used for front or back teeth and is referred to as an E-Max or PZM crown. These are very biocompatible in the mouth and offer a high level of durability and they are ideal for the posterior teeth but they can still be quite fragile to clenching and grinding. This is the reason why they are not as common as the porcelain-fused-to-metal crowns.