When managing soft tissue for a crown preparation/impression (e.g., gingival retraction, hemostasis, minor recontouring), which of the following is NOT a relevant tool for this purpose?

A Tofflemire matrix band is specifically a restorative tool used to create a temporary wall containing restorative material (amalgam or composite) for Class II preparations — it has no role in soft tissue management for crown preparation/impression purposes, unlike electrosurgery, soft tissue lasers, or retraction cord, all of which ARE legitimately used for gingival tissue management in this context.