What is the face-to-terminal-shank angle for Gracey curettes?

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Multiple Choice

What is the face-to-terminal-shank angle for Gracey curettes?

Explanation:
Gracey curettes are built with the blade offset so the face forms a specific angle with the terminal shank. That angle is seventy degrees. This geometry places the working edge in the optimal position to follow root surfaces when you adapt the instrument to a tooth, allowing effective calculus removal with minimal tissue trauma and straightforward wrist/hand movement. In contrast, other instrument designs use different angles, which changes how the edge engages the surface. So the seventy-degree face-to-terminal-shank angle is what defines a Gracey curet’s distinctive geometry.

Gracey curettes are built with the blade offset so the face forms a specific angle with the terminal shank. That angle is seventy degrees. This geometry places the working edge in the optimal position to follow root surfaces when you adapt the instrument to a tooth, allowing effective calculus removal with minimal tissue trauma and straightforward wrist/hand movement. In contrast, other instrument designs use different angles, which changes how the edge engages the surface. So the seventy-degree face-to-terminal-shank angle is what defines a Gracey curet’s distinctive geometry.

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