What is a 'Crown'? Unfortunately, it is not like a headpiece that the Queen gets to parade around wearing, and thankfully a dental crown doesn't cost nearly as much as that piece of jewelry! In technical terms, a crown is a 'fixed prosthetic device' that is cemented in place onto existing tooth structure or onto an implant, and can only be placed and removed by a dental professional. A crown in dentistry has very practical applications, and can also improve the appearance of