Just thought I would mention a favourite product of mine which I use every day. Denti-Brush Interdental Brushes are the most effective interdental brushes I have ever come across and are really comfortable to use. They are very gentle on the gums and teeth and they have soft flexible rubberish heads which means they can get into the smallest areas between the teeth. They can be used with crowns, veneers and implants. I find other brushes are horrible to use compared with the Denti-Brush ones.
They are certainly a little delicate and can easily bend but if you are careful a box can last you ages. The plastic travel case which comes with them keeps them in good order.
Denti-Brush Interdental Brushes