[Investigation of status of dental caries in children of primary school in Hangzhou city from 2009 to 2011].

Purpose: To investigate the status of dental caries in children of primary school in Hangzhou City from 2009 to 2011.

Methods: The status of dental caries was examined annually from 2009 to 2011, and the caries prevalence, filling rates, mean DMFT/dmft were recorded. SPSS 13.

[Traditional Chinese medicine Drynaria fortunei J. Smith naringin promotes proliferation and differentiation of human periodontal ligament cells].

Objective: To investigate the effects of Drynaria fortunei J. Smith naringin (DFSN) on proliferation and differentiation of human periodontal ligament cells (hPDLC).

Methods: Cultured human periodontal ligament cells were treated with DFSN at different concentrations.