1ZHANG Q, KREULEN C M, WITTER D J, et al. Oral health status and prosthodontic conditions of Chinese adults: a systematic review[J]. The International Journal of Prosthodontics, 2007,20(6) :567-572.
2LO E C, LUO Y, DYSON J E. Oral health status of institu- tionalised elderly in Hong Kong [J]. Community Dental Health, 2004,21(3) :224-226.
3ZHANG Q, DICK J WITTER, NICO H J. Dental and prosthodontic status of an over 40 year old population in Shandong Province, China[J]. BMC Public Health, 2011,11 (1) : 420- 432.
4Pathfinder sampling World Health Organization: Oral Health Surveys, 4 edition[Z]. 1997:5-10.
5World Health Organization: Oral Health Surveys, Basic methods 3 edition[Z]. 1987 : 23-27.