PFM Crown & Gold Crown
Porcelain fused to metal crowns
These crowns are made by porcelain coating. The body of the replacement is a metal alloy. The intended color of porcelain is burned onto this frame. Most dentures are made with this method.
- The primary benefit of porcelain fused to metal crown is the price, PFM crowns are one of the cheapest types of crowns available today.
- It is strong enough due to the metal frame, durable and beautiful by the porcelain cover.
- Another advantage is the quality, you will never encounter problems with regards to the durability. With the right maintenance and care, they can last for many years.
- They fit better – the metal structure of PFM crowns mean that they fit better than alternatives.
There is one drawback over time and depending on the individual, gums will have a tendency to recede. As there is metal underneath the porcelain, a light grey line can present an undesired aesthetic effect. As the metal substructure is dark, it needs a layer of a very opaque porcelain so its tint does not show through, therefore only a thinner layer of translucent porcelain can be placed, thus reducing the crown’s overall ability to truly mimic the natural look of a tooth.
The prosthetic frame is made of a special gold alloy. The preparation requires great precision and special attention both from the dentist and the dental technician. The gold which is used is a natural bacteria killer and disinfectant. It does not cause any allergies and it is tissue friendly therefore it can have a very long life with proper oral hygiene. It is usually used when cosmetics are not important. These crowns rarely chip or break, they do not wear down easily and require minimal tooth removal to be applied.
- Strength: gold crowns are prized for their strengths. They are known as a relatively soft metal but gold crowns are cast using alloys to increase their durability and they are much stronger than an other crowns. They will not crack or wear down quickly.
- Reactivity: gold is the least reactive metal used for crowns. This is an important consideration for any patients who use dentures, which often contain metal compounds of their own. Having different types of metal in your mouth can cause a very slight electrical charge. You will not feel it but it can create a slightly metallic taste.
- Malleability: gold is a very malleable material, meaning that it is much easier for a dentist to accurately fit the crown around the tooth. If the fit is not good enough, the crown may become dislodged. Gold also remains strong when cast thin, so more of the healthy tooth structure can be preserved.
- Aesthetics: the biggest problem with using gold crowns is that they do not exactly blend in with the rest of your teeth. Unless you want an ostentatious smile, it is probably going to be best to avoid having a crown made from metal near the front of your mouth. Even rear teeth can be visible while you talk hence if you are desperate not to show a hint of anything but white, gold might not be the best option.
- Allergies: it is possible for a patient to be sensitive to a gold crown or to another metal used during the alloying process.
- Sensitivity: gold conducts temperatures much more readily than other materials used for crowns. This might not be a huge concern for most people, but anyone who already suffers from sensitive teeth might find that the additional sensitivity to hot and cold becomes trying.