Which instrument should be used to pack the retraction cord into the gingival sulcus?

The use of a cord packing instrument is essential for effectively packing the retraction cord into the gingival sulcus. This specialized tool is designed with a rounded tip, which allows for precise placement and gentle packing of the cord without damaging the gingival tissue. Its ergonomic design helps the dental professional to manipulate the cord into difficult-to-reach areas within the sulcus, ensuring that it remains properly positioned during procedures such as impressions or crown placements.

Other instruments, like a scalpel, dental mirror, or explorer, do not serve this specific function. A scalpel is intended for cutting, a dental mirror is for visualizing areas in the mouth, and an explorer is used for examining teeth and detecting cavities. None of these tools can effectively or delicately perform the task of packing the retraction cord, thus making the cord packing instrument the appropriate choice for this procedure.