What is the purpose of epinephrine impregnated cord in dentistry?

Epinephrine impregnated cord is primarily used in dentistry for the purpose of hemostasis and gingival retraction. When placed in the sulcus around a tooth, the cord acts to compress the gingival tissue, effectively retracting it away from the tooth. This retraction is crucial for creating a clear working area for dental procedures, such as impressions or crown preparations.

Additionally, the epinephrine in the cord serves a dual purpose; it acts as a vasoconstrictor which reduces blood flow to the area. This not only minimizes bleeding during procedures but also helps maintain a dry field, which is essential for successful dental work. Thus, the correct answer emphasizes the importance of controlling bleeding and facilitating access to the tooth for various dental treatments.