Are you referring to an electric toothbrush? A regular OralB is not
much of an investment - about $2, I think!

OK,
I am not a dentist, just have a hobby cleaning my teeth.

I use the Phillips Sonic once a day (one of the more glentle electrics, but
in my opinion also more effective), the Oral-B plaque remover once a week
(I recommend buying the soft bristles and discarding the ones that come with
the toothbrush - much too harsh, especially if used daily, nut they could be
used to clean various household items).
Since I brush (gently) 3-4 times a day, I rotate between 6 soft Sensodyne
toothbrushes, so each gets used every other day and has time to dry
properly.  I use Colgate Luminous most of the time, with Prevident 5000
getting some occasional use and I always have a few spare natural
toothpastes with plant extracts (tea tree and stuff like that, just so I
don't miss anything :)) . Occasionally I do a fluoride gel application at
home using custom fitted trays.

I use Sensodyne floss (best bare none),  and alternate between use Oral-B
Fluorinse and  Biotene mouthwashes.  When I can't brush I would chew some
gum with Xyline. After much reading and listening to various qualified
opinions I think this is the best self-care regimen.

Some of these things are expensive to be sure, but I got into this hobby
after being charged $3000 for a couple of fillings (they were under the gum
and required gum lifting), so after that I thought nothing about spending a
few hundred dollars more.  I've only been at this for 1 year, but seems to
help with my teeth sensitiviy due to some receiding gums.