Which of the following is included in soft deposits?

• A. Acquired pellicle
• B. Dental calculus
• C. Enamel hypoplasia
• D. Periodontal pockets

Answer: (A)

The acquired pellicle is considered a soft deposit because it is a thin film of proteins and glycoproteins that forms on the surfaces of teeth shortly after they are cleaned. This biological layer is primarily derived from saliva, and it serves as a protective barrier and a foundation for the attachment of oral bacteria. The acquired pellicle plays an important role in oral health, as it provides a medium for bacterial colonization, influencing plaque formation.

In contrast, dental calculus is a hard deposit formed from mineralized plaque that has been calcified, making it distinct from soft deposits. Enamel hypoplasia refers to a developmental defect of the enamel and is a structural abnormality, not a deposit that can be categorized in the same way. Periodontal pockets are areas in the gum where the tissue has detached from the tooth, leading to an accumulation of soft deposits and bacteria but are not classified strictly as deposits themselves. Thus, the acquired pellicle is the only option listed that fits the criteria of a soft deposit in the oral environment.