Which item is used to dispense composite resin into a prepared cavity?

• A. Shade guide
• B. Composite compule
• C. Light cure
• D. Fissure burs

Answer: (B)

Placing composite resin accurately into a prepared cavity relies on a dispensing system that delivers the paste in a controlled way. A composite compule is designed to hold the resin and fit into a dispensing gun, so when you trigger it, the material is extruded through a tip and can be placed precisely in increments. This setup lets you build up the restoration layer by layer, helping you adapt to the cavity walls and minimize porosity and shrinkage as you cure each layer.

The other items serve different roles: a shade guide is used to select the tooth color to match the restoration, a light-curing unit polymerizes the resin after placement, and fissure burs are cutting instruments used to prepare and shape the tooth surfaces.