Axial Wall Definition — NDEB AFK MCQ
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Correct answer: E — The vertical wall of the preparation that is parallel to the long axis of the tooth
The axial wall is a vertical wall of a cavity preparation that runs approximately parallel to the long axis of the tooth. It is typically the wall closest to the pulp in a proximal box (Class II, III, IV preparations). The pulpal wall (floor) is the horizontal wall perpendicular to the long axis of the tooth overlying the pulp. The gingival wall is the wall of a proximal box at the gingival margin. Correct terminology is essential for clear communication in clinical dentistry.
Reference: Heymann – Sturdevant's Art and Science of Operative Dentistry, 7th ed., 2019