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In dentistry, a crown or a dental cap is a type of dental restoration that completely caps or encircles a tooth or dental implant. A crown may be needed when a large dental cavity threatens the health of a tooth. Some dentists will also finish root canal treatment by covering the exposed tooth with a crown.
A crown is used to cover a tooth and may be commonly referred to as a "cap." Traditionally, the teeth to be crowned are prepared by a dentist, and records are given to a dental technician to construct the prosthesis. The records include models, which are replicas of a patient's teeth, and the impressions used to make these models.
If permanent restoration cannot be carried out immediately after tooth preparation, temporary restoration may be performed. The prepared tooth, ready for placement of restorative materials, is generally called a tooth preparation. Materials used may be gold, amalgam, dental composites, glass ionomer cement, or porcelain, among others.
[3] [4] This problem has not been realised with one study showing long-term data beyond five years, to when the baby teeth are lost, with fewer problems from the tooth with the crown. Crowns placed using the Hall Technique have better long term outcomes (pain/infection and need for replacement) compared with standard fillings. [5] [6] [7]
The root of the lateral incisor is around 1.5 times the length of the crown. [11] The tooth has the most variability in crown shape in the mouth except the maxillary third molar. [10] The two lateral incisors can also be congenitally missing. [12] The teeth are less pigmented and are whiter in appearance than the permanent teeth. [9]
Dental crowns are tooth-colored restorations or metal restorations. [4] They replace the essential structures of a missing tooth caused by root canals, decay, or fractures. [ 5 ] Crowns also serve as full "caps" that restore normal tooth size, shape, and function.
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