Which of the following strokes is recommended for subgingival scaling?

The recommendation of using vertical, oblique, and horizontal strokes for subgingival scaling is based on the anatomy of the tooth and the nature of periodontal tissue. Utilizing a combination of strokes allows for effective removal of calculus and debris from various surfaces within the periodontal pocket.

Vertical strokes are particularly effective for removing deposits from the mesial and distal surfaces of the teeth, as they align well with the natural orientation of these surfaces. Oblique strokes serve well for buccal and lingual surfaces, where a sweeping motion can better adapt to the contour of the tooth. Horizontal strokes, while not predominantly used alone, can be advantageous for accessing areas around the gingival margin and lateral surfaces of the teeth, especially in deeper pockets.

A multi-directional approach allows the clinician to access difficult areas more effectively, ensuring thorough instrumentation of the entire subgingival area. This comprehensive method not only enhances the efficiency of the cleaning process but also minimizes the risk of damaging the tissue by applying pressure in varying directions. Therefore, incorporating all three types of strokes (vertical, oblique, and horizontal) enables a more complete and thorough scaling process, which is essential for achieving optimal periodontal health.