Dental Crowns-What are They and Why are Used
Dental crowns are a sort of “caps” used for a tooth structure that can’t be restored anymore. Ceramic crowns are used as a replacement for a single tooth as well as for several teeth.
The material mostly used for crowns is porcelain fused to a metal base but dentists also use pure porcelain like lithium disilicate, alumina or zirconium. Zirconium has been widely used recently because of its high bending strength (900-1250mpa) and its high esthetical value (it can imitate the natural teeth at its best).
When Are Dental Crowns Used?
Usually, ceramic crowns are recommended by dentists when:
- dental implant must be covered
- a bridge must be attached
- a large filling should be replaced
- a weak tooth must be reinforced to avoid fracture
- fractured tooth must be restored
- discolored tooth should be colored
Today, for restorations such as crowns, inlays, onlays and veneers, Cerec technology is widely used. The Cerec procedure consists in taking a digital optical impression directly in the patient’s mouth, followed by the design of the restoration on the computer with a special software and fabricating the restoration chair side with a special milling called Inlab MCXL.
When Do Dentists Recommend Bridges ?
Usually, a bridge is recommended if one or more teeth are missing. The imbalance caused by missing teeth can lead to gum disease and temporomandibular joint disorders.
Both crowns and bridges are pretty resistant, but sometimes they come loose or fall out. A good oral hygiene is essential if you want to avoid any tooth problems. Also, don’t chew hard foods, ice or other hard objects.