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The Classes Of Cavities



What Are The Classes Of Cavities


by Donna Pleis


Believe it or not, according to the National Institute of Dental and Craniofacial Research(NIDCR), 92% of American adults aged 20 to 64 have had cavities in their permanent teeth, and 26% of them currently have untreated dental decay. But not all cavities are the same, and dental professionals use a specific classification system to assess them. In fact, there are six classes of cavities based on the tooth type and the location of the decay, as well as four classifications that describe the severity of decay.


Cavity Classification System


According to DentistryIQ, classifying cavities began over 100 years ago, when Dr. G.V. Black, an American dentist, developed a system that is still used by dentists today.


Class I This describes tooth decay that occurs on tooth surfaces your dentist can see easily. This category includes cavities on the chewing surfaces of the back teeth, such as your molars and premolars, and decay on either the front or back surfaces of the front teeth.


Class II

These cavities occur on the surfaces between the molars and premolars and are not visible to the human eye.


Class III

This decay occurs on the surfaces between the front teeth, but it does not involve the cutting edges of the teeth. Similar to Class II, this classification of decay is not visible.


Class IV

This decay also occurs on the surfaces between the front teeth, but it involves the cutting edges of the teeth.