I didn't see a dentist for almost 20 years (2004-2023), and just used a traditional manual toothbrush and mouthwash the entire time. Finally got insurance and ran in to see one, and she told me that I should try an electric toothbrush. Her exact recommendation was, "Don't get the $100 ones, and don't get the $5 ones. Something around $20 should be fine."

So I got the store-brand knock-off Oral-B for $15, and used it for six months. When I went in for my next appointment, I told her that I took her advice, and when she took a look in my mouth, she was so impressed with the improvements that she started calling in other dentists and hygenists to look, too.

So, yeah, don't go nuts, but don't cheap out.