Abrasion primarily occurs in which area of the tooth?

The cervical area of the tooth is where abrasion primarily occurs. This region, often referred to as the cervical third, is particularly susceptible to wear due to factors such as improper brushing techniques, the presence of abrasive toothpaste, and dietary habits. The enamel in this area can be damaged leading to dentin exposure, which is more sensitive and can cause discomfort.

In contrast, the occlusal surface is typically more resilient to wear due to the thickness of enamel and how it interacts with opposing teeth during mastication. The gingival third may experience some wear, but it is more commonly associated with gingival recession or erosion rather than abrasion. Finally, the pulp chamber is located deep within the tooth and is not directly involved with the wear patterns typically associated with abrasion. Often, conditions affecting the pulp are a result of trauma or decay, rather than abrasive forces.