Oral hygiene index simplified of high and low socioeconomic levels (9-13 years) school children.

A total of 1600 Egyptian school children from primary and preparatory schools aged from 9 to less than 13 years were included in the study. Oral hygiene was assessed in high and low socioeconomic levels among boys and girls using the simplified oral hygiene index simplified (OHI-S) recommended by green and vermillion. The results showed that all children has debris scores (DI-S), the mean (DI-S) increases by age with the exception of age group 12 < 13 years. No significant difference in the mean (DI-S) scores between high and low socioeconomic level. The least scores were reported in low socioeconomic groups of girls. The mean (DI-S) scores were higher in boys than in girls. Calculus was scarce among 9- < 13-years-old children.