Which type of stroke would be least appropriate for effective scaling?

In the context of periodontal therapy, the effectiveness of scaling techniques relies heavily on the type of stroke applied during the procedure. The random stroke, as indicated by the chosen answer, is the least appropriate because it lacks the consistent and directed approach necessary for effective scaling. Each stroke type has its specific functions and advantages when it comes to removing calculus and biofilm.

Oblique strokes are beneficial for the removal of deposits because they allow for effective engagement with the tooth surface, accommodating the natural contours of the teeth. Horizontal strokes can be used effectively in certain situations, particularly in interproximal areas or on flat surfaces. Vertical strokes are often employed for thorough scaling along the buccal and lingual surfaces, enhancing access and leverage.

In contrast, a random stroke does not provide the focused technique required to successfully remove calculus. It may result in ineffective scaling, missed areas, and increased risk of damaging soft tissues or missing deposits altogether. Therefore, while other strokes are deliberate and strategically chosen for their specific roles in scaling, the random stroke fails to meet these necessary criteria, making it the least appropriate for effective scaling in periodontal therapy.