The Department of Chemistry at the College of Science organized, within a series of weekly lectures, a scientific lecture entitled wrong concepts in oral health, delivered by Dr. Warqaa Mahmoud Ali from Al-Mustansiriya University / from the National Center for Research and Treatment of Blood Diseases. The lecturer aimed to explain some wrong concepts in the preservation of oral health and in the treatment of oral diseases, also the lecture dealt with errors in tooth brushing and mouth wash in addition to the teeth of children and pregnant women with some treatment concepts