Interdental brush having an insertion guidance tip

An interdental brush with a brush portion having a longitudinal extension, comprising:

• a core member folded into two strands extending alongside each other along a longitudinal direction and being twisted about an axis extending along the longitudinal direction;
• a plurality of filaments fastened between the two strands and extending radially from the twisted core member, and arranged side by side along a helix extending along the longitudinal direction thereby forming the brush portion;
• wherein a first set of filaments is arranged along a first longitudinal sub-length of the twisted core member, the filaments of the first set of filaments having a first filament diameter;
• wherein a second set of filaments is arranged along a second longitudinal sub-length of the twisted core member, the filaments of the second set of filaments having a second filament diameter;
• wherein the second filament diameter is smaller than the first filament diameter;
• wherein the second longitudinal sub-length is positioned at a distal end of the interdental brush;
• wherein the second longitudinal sub-length of the brush portion is smaller than the first longitudinal sub-length of the brush portion, thereby providing an insertion guidance tip at the distal end of the interdental brush;
• wherein the brush portion of the interdental brush has a conical shape at the distal end.