The online version of this article (doi:10.1186/s12903-015-0106-7) contains supplementary material, which is available to authorized users.
The authors declare that they have no competing interests.
SZ planned and performed the survey, and prepared the manuscript. JL, ECMLo and CHC supervised this project. BX provided expert opinion and revised the manuscript. All authors read and approved the final manuscript.
Zhang S is a lecturer, Xu B is a professor and Liu J is an associate professor in the Faculty of Stomatology. Kunming Medical University, Yunnan, China. Lo ECM is a chair professor and Chu CH is an associate professor in the Faculty of Dentistry, University of Hong Kong, Hong Kong, China.
The Dai people are one of the ethnic minorities in China and have a population of 1,260,000. They have the same origin as one of the main ethnic groups in Laos and Thailand. The study aims to describe the dental caries and gingival status of 12-year-old Dai children in China and to study the factors affecting their oral-health status.
This cross-sectional oral-health survey was conducted from 2011–2012 with ethics approval. A sample of 12-year-old Dai children living in Yunnan, China, was selected using a multistage and cluster sampling method. One trained examiner performed the clinical examination. Caries experience was measured using DMFT index, and gingival status was assessed with CPI index. A self-completed questionnaire was sent to the children, and they were asked about their backgrounds and oral-health-related behaviors and oral-health knowledge. Binary logistic regression analysis was performed to investigate the factors that affected the caries status.
A total of 875 children were invited, and 823 (94 %) joined the survey. The prevalence of caries experience among the participants was 40 %. The mean DMFT and DT scores were 0.9 and 0.8, respectively. Most children (93 %) had gingivitis, and many (46 %) had calculus. Girls and those who had visited a dentist during the previous year had a higher prevalence of caries.
Dental caries were prevalent among 12-year-old Dai children in China. The periodontal condition of most of the children was poor. Caries were associated with gender and dental attendance.
Additional file 1: Oral health survey of Dai children in Yunnan. (DOCX 21.1 kb)12903_2015_106_MOESM1_ESM.docx
Gao BD, Li G, Wang Y, Guo J, Hao YY, Ding XY. The investigation on dentist structure in some provinces and a city of China. J Pract Stomatol. 2011;27(2):279–82.
Samuel Wahlström: Oral Health Database WPRO: http://www.mah.se/CAPP/Country-Oral-Health-Profiles/WPRO/. Date last accessed 13 February, 2015.
Sheng LY: China statistical year book. Beijing: China Statistics Press; 2010.
Gray M, Morris AJ, Davies J. The oral health of south Asian five-year-old children in deprived areas of Dudley compared with white children of equal deprivation and fluoridation status. Community Dent Health. 2000;17:243–5. PubMed
Pine CM, Adair PM, Nicoll AD, Burnside G, Petersen PE, Beighton D, et al. International comparisons of health inequalities in childhood dental caries. Community Dent Health. 2004;21:121–30. PubMed
Le CH, Sheng LY: China’s ethnic statistical year book. Beijing: China Statistics Press; 2011.
Compile Group of Brief History of Dai Minority Group. Brief history of Dai minority group. Beijing: Nationalities Publishing House; 2009.
Li MJ: Reason and measures of economic development imbalance of Yunnan minority areas. Ecol Econ. 2012;12(261): 73–77.
World Health Organization. Oral health surveys basic methods. 4th ed. Geneva: World Health Organization; 1997.
Lam A, Chu CH, Lo ECM. Oral health of children in rural area of the Philippines. J Dent Res. 2010;89(Spec IssA):1270.
Chu CH, Chau AM, Wong ZS, Hui BS, Lo EC. Oral health status and behaviours of children in Myanmar-a pilot study in four villages in rural areas. Oral Health Prev Dent. 2012;10(4):365–71. PubMed
Monse B, Heinrich-Weltzien R, Benzian H, Holmgren C, van Palenstein HW. Pufa--an index of clinical consequences of untreated dental caries. Community Dent Health. 2010;38:77–82.
Zhang S, Liu J, Lo EC, Chu CH. Dental caries status of Bulang preschool children in Southwest China. BMC Oral Health. 2014; 14–16. doi: 10.1186/1472-6831-14-16.
Qi XQ. Report of the third national survey of oral health. Peking, China: People’s Medical Publishing House; 2008.
Sheiham A. Oral health, general health and quality of life. Bull World Health Org. 2005;83:641–720.
Ling J, Fu Y. Recent Changes in the Curriculum of Chinese Dental Schools. J Dent Educ. 2007;71(11):1447–56. PubMed
World Health Organization. Oral health surveys basic methods. 5th ed. Geneva: World Health Organization; 2013.
- Dental and periodontal status of 12-year-old Dai school children in Yunnan Province, China: a cross-sectional study
Edward CM Lo
- BioMed Central
Neu im Fachgebiet Zahnmedizin
Mail Icon II