Conclusion
All powders caused abrasion on both the enamel and exposed root surfaces in the present study. Sodium bicarbonate-based powder is more abrasive than glycine and erythritol-based powders and may not be recommended use for supragingival air-polishing in patients with gingival recessions. Glycine and erythritol-based powders can be used for supragingival air polishing in patients with gingival recession, however, it should be kept in mind that these powders cause less abrasion on the enamel and root surfaces. All powders caused more abrasion at the maximum power setting than the lower setting. For this reason, it is recommended that the power setting be set to the minimum level at which stain, and plaque can be removed effectively.