Tooth decay also known as tooth decay or tooth cavities is the erosion of teeth 
due to acids produced by bacteria [1], The main cause of tooth decay is bad ha habits, 
including frequent eating foods that contain sugars such as sweets, as well as not 
cleaning teeth regularly; this leads to the accumulation of bacterial waste and thus the 
formation of decay, which is known in English as Caries, bacteria may be cavities in 
the teeth ranging from yellow to black [2], Symptoms may include pain and difficulty 
eating [2-3], Diet, oral health, and general health are interlinked with each other.However, during the last decade studies have indicated that caries comprise a major 
problem in the adult population of both developing and industrialized countries [5-6], Risk 
indicators of dental caries among adults have been evaluated by different investigators in 
different parts of the world, with age being the most commonly reported factor associated 
with a higher number of dental caries [7-8], Women were reported in some articles to have 
more dental caries than men [9_10], while another study did not show any significant 
differences between men and women [11].2
Dental 
carries
high amount of 
carbonated and 
sugar drink
absent of 
fiouride
disease that have 
decreases salivary 
flow
poor oral 
hygiene
large amount of 
sticky sugary food 
candy
 So, this study amid to study the prevalence of dental carries and risk factor -
among genius university stud.This selective eating results in a deficiency of man nutrients in the body, 
which are essential for the integrity of the whole body and teeth, surrounding tissues, 
bones, and wound [4], Epidemiological studies of dental caries in adults are relatively rare.Istanbul is the largest city in Turkey.