Crown – Abutment Supported, Cast Metal Crown, High Noble Metal - Dental Procedure Code Description
The term "crown" is used to describe the portion of your tooth that extends above the gumline - in other words, the portion of the tooth that can be seen in a healthy mouth. It is also used more colloquially to describe the dental procedure of having a prosthetic "crown" placed over a decayed, chipped, cracked, or otherwise damaged tooth.
With this dental procedure code, the prosthetic crown is seated atop an abutment, which itself is attached to a dental implant. In this specific code, the crown can either be screwed or cemented to the abutment and is made of high noble metal. A crown of this type is designated as such because at least 60% of its composition is of the noble metals gold, platinum, palladium, and silver. Of that 60%, at least 40% of that percentage needs to be gold in order to earn the distinction of high noble metal from the American Dental Association. Noble metals are known to interact with human tissue well, and hold up to corrosion and oxidation better than other metals. Thus, the higher the percentage of noble metals, the less likely a crown is to corrode or oxidize.
Use of a full, noble metal crown, as with this dental procedure code, is done when the strength and longevity of the crown are critical, and when repair is needed outside the "smile zone," as with back molars.
Since the procedure for an abutment supported crown involves the placement of a dental implant, you may wish to read the related content concerning endosteal implants, abutments, or eposteal implants for the most complete picture of this procedure. Additionally, for some crown procedures, an abutment is not used, and the crown is screwed directly atop the implant.