Dear lybrateuser,
-Dark chocolate is good as it contains cocoa extract which has antioxidents with beneficial affects on the body
-do have in limited quantity about 2-3 small pieces per day, excess is harmful as it will raise the blood sugar.
Don't eat it more than once a day. Clean your teeth properly after you eat or drink anything. Get you teeth x-rayed to determine the extent of decay. Get your cavities filled accordingly with or without root canal treatment.
Avoid too much of chocolates. Choclates are beneficial according to some studies. But in limited quantity. May cause dental caries. Try to get rid of this.
Having issues? Consult a doctor for medical advice