Certified to EN ISO 13485:2016 , Quality Management System for Medical Devices
ULTICLEAN PROPHYLAXIS POWDER PERIO PLUS
As can be seen in Figure 3, the newly developed Ulticlean Prophylaxis Powder PERIO PLUS shows a very low abrasiveness towards the tooth surface. This gentle property makes it particularly attractive for use on tooth surfaces and tooth necks. As Figure 3 shows, there is a correlation between grain size and abrasiveness. The smaller the grain size, the gentler the powder. In addition, the choice of material used plays a role. For example, the glycine-based powder with a mean particle size of 65 μm has a lower abrasiveness than the sodium hydrogen base powder with a mean particle size of 40 μm. Material properties such as hardness as well as the particle geometry play a major role. Sodium hydrogen base is the hardest and most abrasive powder compared to a Mohs hardness of 2.5-3, followed by glycine with a Mohs hardness of 2. The sugars trehalose, tagatose, and alcohol erythritol all have a Mohs hardness of <2.
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Figure 3: Comparison of different prophylactic powders: EMS Classic Powder, with a mean particle size of 40μm, was normalised to a numerical value of 10. Both the particle size and material properties of the various powders play a role in their abrasiveness
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EMS Classic NaHCO3 40µm
EMS Soft Glycin 65µm
EMS Perio Glycin 25µm
Lunos Gentle Clean Trehalose 65µm
Lunos Perio Combi Trehalose 30µm
EMS Plus Erythritol 15 µm
BA Ulticlean Prophy Perio Plus Tagatose 15µm
Grain Size and Particle Geometry: The mean particle size of the prophylaxis powder plays a role in the abrasiveness of the product. Ulticlean Prophylaxis Powder PERIO PLUS was adjusted to a mean particle size of 15μm because of its low abrasiveness towards enamel and sensitive dentine. Ulticlean Prophylaxis Powder PERIO PLUS has a volume average particle size of d (50) = 15 μm. The values d (10) = 8 μm, d (90) = 33 μm describe the very narrow width of the volume-related particle size distribution. One of the powders used for comparison is the sugar alcohol erythritol (EMS Airflow Plus) with a particle size of 15μm. This powder shows a higher abrasiveness than Ulticlean Prophylaxis Powder PERIO PLUS with a grain size of 15μm. In addition, these two powders were also examined with a light microscope (see Figure 3). It was found that the erythritol-based powder EMS Plus (Figure 3, above) shows a more inhomogeneous composition with partially sharp- edged, pointed particles compared to the tagatose-based Ulticlean Prophylaxis Powder PERIO PLUS (Figure 3, right). Furthermore, Ulticlean Prophylaxis Powder PERIO PLUS study shows a more amorphous, rounder particle structure than the erythritol-based EMS Airflow Plus Powder (see Figure 3). This characteristic explains, among other things, the less abrasive behaviour of Ulticlean Prophylaxis Powder PERIO PLUS. This is because the special particle formation breaks up the powder particles on impact and then distributes their kinetic energy directly to the tooth surface. As a result, the excellent cleaning effect can be explained very well despite the low abrasiveness.
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