What diagnostic test involves gently tapping the tooth to determine the extent of sensitivity?

What diagnostic test involves gently tapping the tooth to determine the extent of sensitivity?

• A. Palpation
• B. Electric pulp test
• C. Thermal testing
• D. Percussion

Answer: (D)

Percussion testing evaluates how the tooth and its supporting tissues respond to tapping. Gently tapping the crown assesses the periodontal ligament and periradicular tissues for tenderness or pain; a positive response suggests inflammation or infection in those tissues and helps gauge the extent of periradicular involvement. This differs from palpation, which checks surrounding soft tissues for tenderness, and from pulp vitality tests (electric or thermal), which determine whether the tooth pulp is alive. So tapping to assess sensitivity specifically targets the health of the periodontal apparatus and periapical area, making it the right choice.

Percussion testing evaluates how the tooth and its supporting tissues respond to tapping. Gently tapping the crown assesses the periodontal ligament and periradicular tissues for tenderness or pain; a positive response suggests inflammation or infection in those tissues and helps gauge the extent of periradicular involvement. This differs from palpation, which checks surrounding soft tissues for tenderness, and from pulp vitality tests (electric or thermal), which determine whether the tooth pulp is alive. So tapping to assess sensitivity specifically targets the health of the periodontal apparatus and periapical area, making it the right choice.