Fig. 2

Illustration of the experimental setup. On the left, the engine (a) turning rotational movement into a linear cleaning movement (forward and backward) moves the interdental cleaning device (b) into the interdental area (IDR) (enlargement of the of three different IDR morphologies (isosceles triangle, concave, convex), each with three different diameters (1.0 mm, 1.1 mm, 1.3 mm)) which is fastened in a socked (c). A force sensor (d) measures the upcoming forces during cleaning cycles