The tooth that protrudes from the gums in the oral cavity is called the dental crown in dentistry. A dental crown is also understood to mean the artificial crown as a dental prosthesis that is used in the event of a defect in the natural tooth. The purpose of the crown is to restore the natural function of the affected tooth and to protect it from tooth decay. If there is a complete loss of a tooth, the neighboring teeth are also crowned and serve as anchoring for dental bridges. To protect the function of the teeth and avoid major damage to the natural dentition, tooth gaps should always be closed promptly.
The veneering material can either be a veneering plastic based on composite or ceramic. In the case of plastics, the adhesive bond is created using an adhesion promoter. Due to the high firing temperature (800 - 900 °C), ceramic requires special firing alloys that form an oxide layer that promotes bonding during the firing process. Ceramic veneering is more complex to process and has aesthetic advantages over plastic veneering.