Which Kennedy class is characterized by an edentulous area that is completely tooth borne?

The correct answer identifies Kennedy Class III as characterized by an edentulous area that is completely tooth borne. In this classification, the edentulous space is bounded by natural teeth on both sides, providing support for a removable partial denture. Since the edentulous area is entirely surrounded by existing teeth, it does not depend on the residual ridge for support, distinguishing it from other Kennedy classes that may involve such areas.

This classification is critical for understanding how dental professionals determine the most appropriate design and support for dentures in patients who have lost teeth. In contrast, other Kennedy classes involve different configurations, such as unilateral or bilateral posterior edentulous spaces that may not be entirely tooth borne and instead rely on other structures for support.