21 Jul Old Crowns
Old Crowns with Grey Edges and Gums
The life of a standard dental crown is 5 to 15 years. Crowns are usually required when the tooth structure is not sufficient for supporting a filling. Earlier, crowns were made of gold (only) and even though they provided an accurate fit, the colour of the crown was an issue. Today, majority of the crowns are made of ceramic and a combination of metals.
Life of a crown
Although, the life of an average crown can be extended with good oral hygiene, even then, dental crowns can only be used for up to 10 years for majority of the people. It is because in the course of the years, an old crown goes through wear and tear due to exposure to bacteria and plaque. It can also rupture or break. Dark root canals or metal in crowns can form a greyish layer around the gums. Keeping these factors in mind, a dentist might suggest replacing an old crown and getting a new one.
You will find different kinds of replacement crowns including the old-fashioned gold, combination of different metals, porcelain and so on. Today porcelain jacket crowns are being used extensively in the dental world as they offer more strength. Porcelain is also easy to mix with silver or gold.
The function of a crown is to hide the part of a tooth which can be seen above the gum structure. In case the particular part is not strong enough to support a crown, the dentist takes an impression which is then given to a dental technician. The technician makes a crown that fits the tooth and gives it to the cosmetic dentist. The fitted crown is then placed on the tooth. You will require only two visits to the dentist to complete the procedure.
Types of crowns
As mentioned before, there are several types of crowns, but the application of ceramic crowns is fast gaining popularity as they have a more natural look and feel to them. They do not contain any metal are also aesthetically appealing.
Porcelain bonded crowns: They have porcelain merged on top of a metal core. The front and back teeth are restored with these crowns.
Ceramic crowns: They do not have a metal core so that they are aesthetically appealing.
Porcelain crowns: Front teeth crowns can be made of porcelain.
Gold crowns: They are made from a combination of gold and different metal alloys.