Gracey curettes have how many cutting edges per end?

• A. Two
• B. One
• C. Three
• D. Four

Answer: (B)

Gracey curettes are site-specific tools designed so that each working end has a single cutting edge. The blade is ground on one edge, providing one active cutting edge that engages the tooth surface as you work along the root. The opposite edge remains non-working and dull, which helps prevent accidental gouging and allows the clinician to maintain the correct angulation on curved root surfaces. This design is what makes Gracey curettes efficient for calculus removal on specific tooth surfaces. If an instrument had more than one cutting edge per end, it wouldn’t be a Gracey curette; those designs are different instruments such as universal curettes. So, per end, there is one cutting edge.