Abfraction lesions can show up as notches on the chewing points (cusps) of a back tooth. They also show up as lines or cracks in the enamel of a tooth. They can be seen if you shine a flashlight or bright light on your teeth and look in a mirror. The lines usually run up and down (vertical) for the length of a tooth. You also can have cracks in the neck of a tooth (the part closest to, or just under, your gums).

People who grind their teeth are more likely to get abfraction lesions because their teeth are subjected to repeated pressure when grinding.

Abfraction lesions are relatively common in adults, especially older adults. They occur more often in premolars and molars, but they can occur on any tooth.

Teeth with abfraction lesions are not more likely to decay, but they can weaken over time and be at a higher risk of fracture.

Treated lesions are filled with composite material or glass ionomer cement. This procedure sometimes is similar to filling a cavity. In other cases, the tooth does not need to be drilled first.

Sometimes abfraction lesions increase the risk of tooth fracture, and treatment will strengthen the teeth. Some people may think the lesions are unattractive and ask their dentists to cover them. However, in most cases the lesions do not cause problems, and it is up to you and your dentist whether they should be treated.

A cracked tooth is a more serious situation than a tooth with abfraction lesions. Deep cracks that affect the pulp of the tooth are painful, and these teeth need immediate treatment.