Apples may be good for the Doctor but not for your teeth.  According to studies done eating apples can be up to four time more damaging to your teeth then carbonated drinks such as soda. Doctors are right in saying that eating apples is good, however what is bad for your teeth is the way you eat apples. The high acidity level in apples can damage your teeth if you eat them slowly. Where as drinks most often associated with dietary erosion, particularly cola, showed no increased risk.