HOSA Dental Terminology Practice

A bulla is defined as an elevation of tissue that appears blister-like. This characteristic distinguishes it from other types of lesions, as a bulla is typically larger than a vesicle and is filled with clear fluid. The blister-like appearance indicates that it can encompass an area of the skin or mucous membrane that has been elevated due to fluid accumulation beneath the surface, often due to various causes, including trauma, infection, or inflammatory processes. Recognizing the distinct appearance and the fluid content is crucial for proper diagnosis and treatment in dental and medical contexts.

In contrast, the other options describe lesions with different characteristics. For example, a solid area that is less than 1 cm relates more to a papule, while a flat lesion with a broad base would describe a plaque. A lesion containing necrotic tissue, on the other hand, involves tissue death and is not necessarily indicative of the blister-like characteristic associated with a bulla. Therefore, the defining features of a bulla align clearly with the choice indicating its blister-like elevation.