Which method of gingival retraction uses chemical agents?

The method of gingival retraction that utilizes chemical agents is indeed chemical retraction. This technique involves the application of specific chemical agents that help to temporarily shrink or retract the gingival tissue, thereby providing improved visibility and access to the underlying structures during dental procedures.

Chemical retraction is often achieved using hemostatic agents like ferric sulfate or aluminum chloride, which not only aid in retraction but also minimize bleeding by constricting blood vessels in the tissue. These chemical agents work by causing the tissue to become less permeable, effectively pulling the gingiva away from the tooth or area being worked on. This is particularly useful during procedures like crown preparation or impression taking, where clear access to the margins is crucial for accurate results.

Understanding the role of chemical retraction can enhance the effectiveness of dental procedures and ensure that the surrounding tissues are respected and preserved during treatment. This emphasis on chemical agents distinguishes it from other methods of gingival retraction, which may rely on mechanical means, surgical techniques, or physical manipulation without the use of chemicals.