Periodontitis is a biofilm-induced multifactorial disease characterized by non-reversible damage of the periodontal tissues. Dysbiosis of the subgingival microbiota plays a crucial role in periodontitis. In this regard, conventional periodontal treatment consists of subgingival mechanical instrumentation, but adjunctive methods, such as air-polishing powders, have also sparked considerable interest due to their ability to efficiently disrupt biofilm with minimal tissue damage. The aim of this narrative review is to provide an overview and critical discussion of the recent literature on the properties and interactions of air-polishing powders with oral bacteria and soft tissues. Fifteen studies were included. Eight recent clinical studies demonstrate that air-polishing powders (e.g., glycine, erythritol) can significantly reduce periodontal pathogens, thereby supporting their role in effective biofilm control; In vitro evidence from four included studies indicates cell-type-specific responses to different powders, with trehalose demonstrating superior biocompatibility compared with glycine and erythritol/chlorhexidine formulations. This variability highlights the importance of choosing the right powder to improve clinical outcomes and reduce tissue side effects. By integrating microbiological, cellular and histological findings, the objective of this review is to clarify the antibacterial efficacy and biocompatibility of air-polishing powders. Overall, air-polishing powders have been shown to be safe and effective as an adjunctive treatment, in both active periodontal and supportive periodontal therapy.

Background: Maintaining daily optimal dental hygiene, especially in medically vulnerable patients with periodontitis, remains challenging in dental practice. Mobile apps and other digital tools might offer useful support alongside traditional advice. Objectives: This study aimed to develop a mobile health app, PerioSupportPro, that helps patients improve their daily plaque control habits. It also reports on the pilot testing of the app’s usability and users’ perception in a small patient group. Methods: The app was created by a mixed team including periodontists, psychologists, developers, and data protection specialists. The first version included reminders, gamified elements, video tutorials, and motivational messages. After internal testing, a group of 18 patients tested the app and completed a feedback questionnaire that assessed usability (Q3–Q5), educational impact (Q6–Q8), motivation (Q9–Q11), and overall satisfaction (Q12–Q14). Cronbach’s alpha was used to check internal consistency, and non-parametric tests were applied for basic statistical comparisons. Results: The motivation section of the questionnaire showed acceptable consistency (α = 0.784), while usability and educational impact had lower values (α = 0.418 and 0.438). No clear differences were found between age groups. Satisfaction was positively associated with reminders and motivational items. Most appreciated features included reminders, the simple interface, and short videos. Based on the input provided by the questionnaire, a few improvements were made, and a second version of the app was prepared. Conclusions: Early user responses show that PerioSupportPro may help motivate and guide patients in their oral hygiene routine. While still in an early phase, the app seems well-received and ready for future clinical validation with more users.