32 Lieps, Till Ole Wilm Braun, Andreas Reich, Sven 541000-2 ; 937510 RWTH Aachen University Aachen German 1 Online-Ressource : Illustrationen Air-polishing-devices are widely used in clinical practice. APDs can cover a wide range of indications, from cleaning the teeth before bonding of orthodontic brackets, professional tooth cleaning or removing subgingival biofilm as part of periodontitis therapy. The importance of APDsare increasing. The aim to compare the novelly trehalose-based APD „MyLunos“ with the clinically established, glycine-based APD „Handy 3.0“. The systems were compared in terms of supragingival and subgingival cleaning efficiency of artifical dental plaque on an imitation three-dimension tooth model. Also the comparison of supragingival versus subgingival cleaning efficiency for the different APDs was investigated. In four test groups, consisting 12 models with 4 teeth each, the cleaning performance of the APDs was compared in their respective indications. The with artificial dental plaque coated teeth in the artificial Frasaco dental model were scanned with the Cerec Primescan before and after the reduction. The movement of the APDs was controlled by computer guided engines on an XY-table. The scan of the initial situation and the scan of the after the reduction were inserted into the Oracheck software as STL-files and matched. Afterwards the vestibular surfaces of the teeth were marked and a volume difference (mm³) between the initial situation and the situation after the reduction was determined by the software. The four APDs differed significantly in terms of volume difference between all groups (p < 0.0125).The Handy 3.0, using glycine-based prophylaxis powder, demonstrated higher cleaning efficiency with larger volume differences in both supragingival and subgingival in comparison to the MyLunos, which uses trehalose-based prophylaxis powder. The MyLunos with trehalose-based prophylaxis powder showed a statistically significant removal of dental plaque (p < 0.0125). The subgingival useable configurations of the Handy 3.0 and MyLunos achieved significantly larger volume differences, resulting in higher cleaning efficiency compared to the supragingival configurations of both powder jet devices (p < 0.0125). Results show that all four APDs considered, can statistically significantly reduce dental plaque in their resprective indications. For clinical comparability further in-vivo studys will be necessary. Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2026 ; Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025 ; 2, ; PUB:(DE-HGF)11, ; Dissertation / PhD Thesis Dissertation Rheinisch-Westfälische Technische Hochschule Aachen 2025 2025 RWTH-2025-10921 2025 https://publications.rwth-aachen.de/record/1024010