Which instrument is recommended for placing a matrix band?

The recommended instrument for placing a matrix band is a burnisher. This tool is specifically designed to help shape and adapt the matrix band around the tooth structure effectively. The burnisher has a smooth, rounded end that allows the dental assistant to gently push the band against the tooth margin, ensuring that it fits properly and securely. This is crucial for creating a tight contact point with adjacent teeth and for achieving an optimal restoration.

The other instruments listed do not serve the same purpose. The explorer is primarily used for examination and detecting decay, the excavator is designed for removing carious dentin and debris from cavities, and the scalpel is used for incising soft tissue. Each of these instruments has its specific role in dental procedures but does not provide the necessary functionality for securely placing a matrix band like a burnisher does.