In Leonard's vertical technique for plaque control, how is the brush oriented and what motion is used?

• A. The brush is held perpendicular to the teeth with an up-and-down vertical motion
• B. The brush is held parallel to the teeth with a circular motion
• C. The brush is held at a 45-degree angle with a diagonal motion
• D. The brush is used with horizontal sweeping motions only

Answer: (A)

Leonard's vertical technique uses a brush held at a right angle to the tooth surface, and the cleaning is done with short, up-and-down strokes. This perpendicular orientation lets the bristles contact the crown and gingival margin in a clean, controlled way, enabling effective plaque removal from each tooth with minimal gum irritation. It also makes the technique easy to teach to children, encouraging a systematic, tooth-by-tooth approach rather than scrubbing.

Other approaches use different motions and orientations—circular brushing, diagonal or angled strokes, or horizontal sweeping—none of which match the vertical, perpendicular setup of Leonard's method.