CPT CPT Periodontal Instrumentation & Scaling Techniques

Question 1

Which Gracey curette is specifically designed for scaling the mesial surfaces of posterior teeth?

Accepted Answer

Gracey 11/12

Answer

Gracey 11/12 curettes are area-specific instruments designed to adapt to mesial surfaces of posterior teeth.

Question 2

What is the correct blade angulation of a curette to the tooth surface during active scaling?

Accepted Answer

45–90 degrees

Answer

A blade angulation of 45–90 degrees to the tooth surface is required for effective calculus removal with a curette.

Question 3

Which ultrasonic scaler insert is best suited for removing heavy supragingival calculus?

Accepted Answer

Beaver-tail insert

Answer

Beaver-tail inserts are designed for heavy supragingival calculus removal due to their robust, broad design.

Question 4

The modified pen grasp is preferred for periodontal instrumentation primarily because it:

Accepted Answer

Allows tactile sensitivity and precise control

Answer

The modified pen grasp provides optimal tactile sensitivity and precise control during subgingival instrumentation.

Question 5

What is the primary purpose of root planing compared to scaling?

Accepted Answer

Smooth the cementum and remove embedded endotoxins

Answer

Root planing smooths cementum and removes embedded endotoxins to create a biologically compatible root surface for tissue reattachment.

CPT - Certified Periodontal Therapist Practice Test