More than just prevention, can hydrogen peroxide soften and eventually get rid of plaque and tartar? Is it effective in whitening teeth?
No. Plaque and tartar that have calcified on your tooth must be removed by a hygienist. It may wear away slightly but won't go away completely. Yes, hydrogen peroxide is effective in whitening your teeth, however make sure you are using a professional product or one over the counter. Don't try and create something yourself, you will most likely damage your gums and or enamel.
No, kind of. Hydrogen peroxide will help kill bacteria in our mouths and bacteria is the reason we have plaque. Tartar or calculus is the hardened remnants of that same bacteria. So it will slow the growth of both. Yes, the rinse will also whiten your teeth very slowly. Few people can tolerate the full strength rinse so mixing hydrogen peroxide and water or any mouth rinse could be effective.