Reciprocating Endodontic Files — NDEB AFK MCQ

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ModerateEndodonticsReciprocating Endodontic FilesNDEB AFK

Which of the following endodontic files uses a rotary motion with a reciprocating (alternating clockwise-counterclockwise) action?

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Correct answer: E — WaveOne (and WaveOne Gold)

WaveOne and WaveOne Gold files (Dentsply Maillefer) use a reciprocating motion — alternating clockwise (engaging) and counterclockwise (releasing) rotations. This motion reduces the risk of file separation compared to continuous rotation by relieving torsional stress. Reciprocating single-file systems have simplified endodontic instrumentation by allowing complete canal preparation with a single instrument in many cases.

Reference: Torabinejad – Endodontics: Principles and Practice, 6th ed., 2021