Patients often ask which kind of toothbrush should they use? This question can be a rather complex issue, but we can break it down to three types of toothbrushes:
1. Rotating Head Toothbrush
2. Sonic Toothbrush
3. Manual Toothbrush
I have tried all three of them, and find that they each have their own strengths. I own an Oral-B, Sonicare, and an oral-b manual toothbrush. I found that the Oral-B was really good for removing plaque in between teeth (I tested this by flossing afterwards to see what the toothbrush missed). I like the sonicare since it cleans the gums really well and is very gentle. The manual toothbrush... varies a lot. All you need is a soft toothbrush and the proper technique.
That brings us to the importance of proper technique. Here's a very good guide from Colgate on the aspects of brushing technique:
http://www.colgate.com/app/CP/US/EN/OC/Information/Articles/Oral-and-Dental-Health-Basics/Oral-Hygiene/Oral-Hygiene-Basics/article/Taking-Care-of-Your-Teeth.cvsp
I would recommend an electric toothbrush for people who have a hard time reaching the backs of the backmost teeth, which is almost everyone.