Which device is used to condense gutta-percha against canal walls to eliminate gaps?

• A. Finger spreader
• B. Root canal pluggers/spreaders
• C. Apex locator
• D. Articulating paper

Answer: (B)

In obturation, the aim is to create a dense, void-free fill that seals the canal. After placing the master gutta-percha cone, a spreader is used to condense the gutta-percha laterally against the canal walls. This lateral condensation pushes the material into irregularities and accessory spaces, eliminating gaps between the cone and the dentine walls and between cones. The instrument used for this purpose is a root canal spreader or pluggers—the spreader, often in a form like a finger spreader, is designed specifically to compact GP against the walls. Apex locators and articulating paper serve other roles (length determination and occlusion checking, respectively) and do not perform this condensation to reduce voids.