A Full Mouth Radiographic Survey Indicates the Presence of Subgingival

Multiple Choice

A full mouth radiographic survey indicates the presence of subgingival calculus in the mandibular right posterior sextant, but the clinician is unable to detect it with an ODU 11/12 explorer. All of the following may contribute to an inability to detect calculus EXCEPT one. Which one is the EXCEPTION?

A) Not resting the middle finger lightly on the side of the instrument shank
B) Grasping the instrument handle too tightly
C) Keeping the anterior-third of the working end adapted to the root surface
D) Not inserting the explorer to the base of the periodontal pocket