Tapered diamond bur is primarily used to do what in access preparation?

• A. Used to gain access to canal
• B. Used to soak Cresophene
• C. Dry canal
• D. Fill with gutta-percha

Answer: (A)

The main idea here is how the tapered diamond bur functions in preparing an access cavity. A tapered diamond burr is used to remove tooth structure efficiently and shape a coronal entry that narrows toward the canal, creating a funnel-like access. This helps expose the canal orifices and gives straight-line access for subsequent instrumentation, while preserving as much surrounding tooth structure as possible.

It isn’t used for soaking antiseptics, drying the canal, or placing obturation material like gutta-percha, which involve other tools and steps in endodontic treatment.