There are two kinds of brushes: manual brushes and power brushes.
Of the power brushes there are those requiring batteries and those with rechargeable stands. The head movement of the battery operated brushes (those you buy at Target for $6-$7) is not very effective. Look for a brush with its own rechargeable stand. We recommend the higher end brushes: Sonicare or Oral-B. The price runs about $90.00. The Sonicare has the conventional style brush head, long and thin. The Oral-B has a small, round head. Both are good brushes. It’s just a matter of preference regarding the brush head. The bristles in both the Sonicare and Oral-B are soft enough to prevent them causing recession. However, remember that when using a power brush not to push too hard against the teeth while brushing. Let the brush do the work.