NEBDN OSCE Practice Exam

When removing carious dentin, the goal is to scoop out the soft, infected tissue while preserving as much healthy dentin as possible. An excavator is designed for this exact task; its spoon-shaped blade lets you gently scoop away softened carious dentin and feel the difference in hardness, ensuring you remove the decay without over-preparing the tooth. The other instruments serve different purposes: a plugger packs restorative material like amalgam, a burnisher smooths and finishes the surface of a restoration, and an enamel chisel shapes enamel margins or removes unsupported enamel. Therefore, the instrument that best accomplishes excavating carious dentin is the excavator.