Which instrument has a right-angle design and is used to access difficult-to-reach areas?

• A. Mouth mirror
• B. Flat plastic
• C. Amalgam plugger
• D. Right angle probe

Answer: (D)

Access to difficult-to-reach areas relies on instrument geometry. A right-angle probe is shaped with a bend in the shank, so the tip can be directed into tight spaces, such as around molar surfaces or beneath the gingival margin, while the handle stays in a comfortable position. This angle lets the practitioner feel and measure around root surfaces and into subgingival pockets that straight instruments can’t reach, making it ideal for probing areas that are otherwise hard to access. The other tools have different primary functions: a mouth mirror is for indirect vision and illumination, not for reaching into restricted spaces with a probing tip; an amalgam plugger is used to condense filling material inside a cavity; a flat plastic instrument is typically used for shaping or manipulating restorative materials, not for accessing difficult areas.