All Curaprox brush heads come with gentle Curen filaments which allows for efficient cleaning at minimal pressure.
The are cleaning mechanically as well as create a hydrodynamic effect. To create a good hydrodynamic effect, we achieved best results with this kind of brush which has some more space between the filaments bundles.
So the cleaning method as well as the much smaller brush head design whit less dense bristle tuft is s different to a manual brush head like the 5460. Therefore the number of filaments is and was never a communication focus for this product.
The focus is the droplet shape, Curacurve ergonomic and gentle filaments.