If you ask 10 people whether they use an interdental brush especially in India, chances are all of them would say : AN INTERDENTAL BRUSH !!WHATS THAT ? In USA, u would find maybe 2-3 out of 10 know about an interdental brush but hardly anybody uses it on a regular basis. But people do get cavities on a regular basis.
The Oral b interdental brush is a smart brush. For people who have got gaps in between their teeth, have some fillings, have bridges or crowns on their teeth, braces. The Brush has excellent quality bristles which are designed so as to reach areas which are not accessible by a regular tooth-brush.
the other brands of interdental brushes available are from Colgate which arenot bad, But Oral b has always been renowned for the superior quality toothbrushes.
And dont forget the regular tooth brushing twice a day along with it.