This population-based case-control study involved 546 children, 182 cases with a high negative impact on OHRQoL and 364 controls with a low negative impact on OHRQoL. The mean age was 9,08 (29.7%- 8 years old; 32.6%- 9 years old and 37.7%- 10 years old). The controls were individually matched with cases for gender and school using a 2:1 ratio. Table 1 demonstrates the frequency distribution of independent variables for matched cases and controls. There was no significant difference in traumatic dental injuries and malocclusion between the case and control groups (p>0.05). There was a statistically significant difference in dental caries experience between the case and control groups (p<0.05).