Self-brushing toothbrushes. Waterpiks. UV teeth-whitening lights. With so many oral health innovations on the marketing – and so many more coming out each year - it can be overwhelming to consumers to know which products work, and which ones just aren't worth the investment. After all, why spend $200 on a whitening kit if it’s no more effective than your $4 whitening toothpaste? Here, we'll go over some of the more popular at-home products to help you decide which ones to buy.