Interprox® Plus mini has been designed to eliminate oral biofilm (bacterial plaque) accumulated in interproximal spaces of 1.1 mm*, specifically in the premolar or molar area. The numerical coding by size or PHD (Passage Hole Diameter) indicates the size of the smallest space through which the brush can be inserted. It is important that the brush is inserted loosely into the interproximal space, so that it is the bristles and not the wire that are in contact with the teeth. If the wire rubs against the gums or bends, it is advisable to use a brush with a PHD or smaller size. The dentist or dental hygienist can help you determine the size of the interproximal space and the brush that best suits each case.