The last cause is brushing unclean. You ever ask yourself that daily brushing 2-3 times a day, but why you teeth decayed. The answer is we pay attention to brushing too little. Some people just has brushed your teeth into left and right, then stop toothbrush. Therefore, you should brush your teeth properly. A lower molar on the tongue, teeth below the tongue, the teeth on the cheek, so when you start brushing is recommended to start a brush in his teeth that you think the brush, clean minimal prior to that emphasize cleaning this area before the next tooth comb your side, you will clean it thoroughly. Use the floss the teeth clean the teeth. Using dental floss properly can help remove plaque and food debris on the grounds that a toothbrush cannot reach, such as teeth and gum line. Due to the accumulation of plaque can cause tooth decay. Using dental floss daily is necessary.