[Survey of the coverage and influencing factors of pit and fissure sealants in primary and middle school of Hangzhou city].

Purpose: To investigate the coverage of pit and fissure sealants in primary and middle school students of Hangzhou city, and to explore the causes of unsealing students.

Methods: An analysis of sealing rate and unsealing causes of eligible children in Hangzhou city was carried out, using 3-year data of pit and fissure sealants program sponsored by the government. Based on the results, the validity of pit and fissure sealants as a government-sponsored public health program was evaluated.