No amount of calcium tablets will help if you have bad teeth. Teeth are not like bone, and supplementing with calcium in adulthood will help prevent bone loss. Teeth begin to develop in infancy and early childhood, during which time their development is gradually completed, and when they erupt their texture is completely stabilized, so that it is not possible to re-enforce their texture by any means. From this point of view, it is not possible to take calcium preparations in the hope that the teeth will be further stabilized or even hardened. The main thing you can do is to maintain good oral hygiene every day, that is, three times a day to adhere to enough three-minute brushing, and at the same time, it is recommended that every six months to one year to a professional dentist for scaling treatment, in addition to cleaning periodontal, but also to check the mouth whether there are caries, pericoronitis and a series of other problems.