Retrospective, observational cohort study.

Objectives :

To search for correlations between socio-economical deprivation and oral health in french children of 9 years of age.

To study the annual use of oral and dental care of children from 6 to 9 years of age depending on their geographical and socio-economical environment, and the medical demography ; To identify and study the share of the cohort not using oral and dental care, and the socio-economical and geographical factors implicated in this non-use of care.

The study will use data from the french nationwide healthcare systems database (SNDS) and data from the french national institute of statistics and economic studies (INSEE).

Inclusion criteria:

• Being born in 2008
• Being covered by the mandatory french national health insurance plan without discontinuity between 2014 and 2017
• Living in France without discontinuity between 2014 and 2017

Exclusion criteria:

- None

Patients born in 2008

NC