Since you can not work forever with a single bust head, you should buy these brushes in stock. You have also the same below a discreet, colored marking and are individually wrapped. I would strike if the price per piece is about 4, because then such a brush head is hardly more expensive than a good manual toothbrush, but what makes teeth cleaning As many times a Handzhnbürste.
Here the right toothbrush there with a review from me, in which I have given to the device 4/5 stars. So read first, then slammed !!! :-) And at question I stand naturally you with advice and practical help ;-)
Braun Oral-B Pulsonic Slim electric sonic toothbrush (entry-level model of the Pulsonic Series)