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洁牙的误区有四个 很多孩子都中招了家长却不自知
洁牙的误区有四个，洁牙破坏牙釉质：牙冠外方最外侧的那一层叫牙釉质，它是非常坚硬的一层组织，洁牙对它没有影响，不会造成损害；洁牙使牙缝变大：由于牙石、菌斑的堆积，牙齿变得肿胀，洁牙把牙缝的牙石清理掉，肿胀消失，使人觉得是牙缝变大了，其实洁牙本身不会使牙缝变大；洁牙暴露牙根：正常的牙
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