What describes the orientation of the toe during a horizontal stroke?

In periodontal instrumentation, understanding the orientation of the toe during a horizontal stroke is crucial for effective debridement and patient safety. When executing a horizontal stroke, the toe of the instrument is oriented apically. This orientation allows for optimal adaptation of the cutting edge against the tooth surface, providing the best access to the subgingival areas.

With the toe pointing apically, the clinician can achieve a clear and unobstructed view of the area being treated. This angulation ensures that the instrument's cutting edge can efficiently remove calculus and biofilm by aligning properly with the root surface. Additionally, apical orientation minimizes the risk of damaging the soft tissue or the tooth itself, which is a key concern in periodontal therapy.

The other orientations would not facilitate the most effective or safest use of the instruments in this context. Keeping the toe directed apically enhances the ability to access various surfaces around the tooth while ensuring precision in the scaling and root planing process.