Which instrument is used to probe and detect canal openings?

• A. Retraction cord
• B. DG16 Endodontic probe
• C. Alginate
• D. Elastomer impression material

Answer: (B)

Locating canal openings relies on tactile probing with a fine endodontic explorer. The DG16 Endodontic probe is designed for this purpose; its slender, sharp tip allows you to feel for the tiny canal orifices on the pulp chamber floor as you gently sweep the walls. Drying the chamber and using good illumination or a mirror helps you detect subtle changes in texture or a small catch that indicates an orifice. This targeted probing is specifically meant to identify where the canals begin.

The other items aren’t for this task. Retraction cord is used to move the gingiva and control moisture, while alginate and elastomer impression materials are used to take dental impressions rather than locate internal canal anatomy.