An investigation of first permanent molar eruption and dental caries in 8-year-old children from public and private schools in Haizhu district of Guangzhou

Abstract

Objective To investigate current status of first permanent molar eruption and dental caries in 8-year-old children in Haizhu district of Guangzhou in order to analyze whether there are differences between private and public schools.Methods In accordance with principle of the Guideline for Third National Oral Health Survey,the first permanent molar eruption and dental caries in third grade (8-years-old) children from 50 public and private primary schools in Haizhu district of Guangzhou were evaluated by cluster sampling method.The results were statistically analyzed.Results The rate of first permanent molar eruption was 89.9 ％ in 6,316 children aged 8.The eruption rate was higher in girls than in boys.The incidence of caries in first permanent molar was 12.4 ％.The rate of caries was higher in private schools than in public schools.The incidence of caries was higher in girls than in boys.Conclusions There are statistical differences in incidence of caries in permanent molar between public and private schools.Free pit and fissure sealant should be provided.Besides,a new model of prevention and control of dental caries for private school students should be established. Key words: Public; Private; Pit and fissure sealant, eruption, dental caries