Int J Stomatol ›› 2020, Vol. 47 ›› Issue (4): 391-396.doi: 10.7518/gjkq.2020072

• Original Articles • Previous Articles     Next Articles

Analysis of tooth condition and the effect of the first permanent molar pit and fissure sealant in 7-9-year-old children in Chengdu

Zhong Ting1,Deng Yalan1,Shao Meiying2,Lei Lei1,Li Xue1,Hu Tao1()   

  1. 1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Preventive Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
    2. West China School of Public Health, Sichuan University, Chengdu 610041, China
  • Received:2019-11-08 Revised:2020-04-16 Online:2020-07-01 Published:2020-07-10
  • Contact: Tao Hu
  • Supported by:
    This study was supported by Comprehensive Intervention Project for Prevention and Control of Chronic Diseases in Children’s Oral Diseases in Central and Western China(002000001);Key Research and Development Project in Sichuan Province(2018SZ0139);Postdoctoral Science Foundation of Sichuan University(2018SCU12013)


Objective This study aimed to evaluate the health status of children aged 7-9 years in Chengdu City and explore the factors affecting the retention rate of their first permanent molars 1 year after the application of pit and fissure sealants. Methods Detailed examinations were conducted on the first permanent molars of children who participated in the Comprehensive Intervention Program for Children’s Oral Diseases in Central and Western China in 2017. The first permanent molars that met the criteria for pit and fissure sealants were sealed, and the sealant retention and caries were reviewed after 1 year. Results were analysed using chi-square test on SPSS 22.0. Results A total of 1 877 teeth were examined among 629 children. The complete retention rate was 87.75% a year after sealing and caries, detection rate of the first molars was 0.96%. Among these teeth, 46, 36, 16 and 26 had 91.61%, 88.25%, 87.69% and 84.40% retention rates, respectively. The retention rate of 26 teeth was lower than that of 46 teeth, and the difference was statistically significant (P<0.001). When grade of schoolchildren was used as the factor, the retention rate of third grade was 89.34% which was slightly higher than that of second grade at 86.57%, but the difference was not statistically significant (P=0.071). Conclusion The retention rate of 1-year pit and fissure sealants was 87.75%. The 26 teeth showed the lowest retention rate, and 46 teeth had the highest retention rate. Tooth position is one of the main factors affecting the retention rate of pit and fissure sealants.

Key words: pit and fissure sealing, retention rate, the first permanent molar, caries

CLC Number: 

  • R780.1

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