An alternative to dental floss, interdental brushes are designed for cleaning between the teeth, below the gum line and around appliances (e.g. bridges and braces). Suitable for anything but the tightest of contact points, most people tend to find these somewhat easier to get to grips with and less time consuming than flossing.
As you can see there are many different ranges of interdental brushes. If you have not been recommend a particular range by your dental professional choose one that you feel best meets your budget or requirements...ultimately they all perform a similar function.