Article | 12. 2018 Vol. 18, Issue. 6
The number of existing permanent teeth and the denture status of elderly adults aged 65 years and above living in metropolitan cities using data from the Korean National Health and Nutrition Examination Survey



Department of Preventive and Community Dentistry, School of Dentistry, Pusan National University, Yangsan1
BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan2
Periodontal Disease Signaling Network Research Center (MRC)3




2018.12. 921:932


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Objectives: The aim of this study was to investigate the number of existing permanent teeth and the denture usage status in elderly adults aged 65 years and above living in metropolitan cities and to confirm the degree of oral health inequality caused by the differences in oral conditions in each metropolitan city using the Lorenz curve and the Gini coefficient. Methods: The raw data for the analysis were obtained from the dataset of the sixth Korea National Health and Nutrition Examination Survey conducted between 2013 and 2015. The subjects included 1,764 people who underwent oral examination and answered questions. The complex samples general linear model was used to analyze the number of existing permanent teeth adjusted for age and monthly household income. The proportion of edentulousness and the denture status was analyzed using complex samples crosstabs. Results: The number of existing permanent teeth in the elderly adults aged 65 years and above was lowest in Ulsan (15.41) and highest in Gwangju (20.44). The proportion of edentulousness was highest in Busan (14.5%) and lowest in Daejeon (4.0%). With regard to the proportion of denture users, Busan had the highest tendency for denture usage (50.4%) and Gwangju had the lowest tendency (34.9) (p=0.172). The Gini’s coefficient for the number of existing teeth was lowest in Busan (0.332). Oral health inequality was most severe in metropolitan cities. Conclusions: We found that oral health inequality exists among elderly adults living in the metropolitan cities of Korea using the Lorenz curve and Gini’s coefficient.



1.  [1] Statistics Korea. Korea Statistical Information System(KOSIS), Statistic DB, Life expectancy [Internet]. [cited 2018 Jun 26]. Available from: http://kosis.kr/statHtml/statHtml.do?orgId=101&tblId=DT_1BPA201&vw_cd=MT_ZTITLE&list_id=A41_10&seqNo=&lang_mode=ko&language=kor&obj_var_id=&itm_id=&conn_path=MT_ZTITLE#.   

2.  [2] Kim HN, Ha TG, Kim MJ, Jun EJ, Jeong SH, Kim JB. Factors related to number of present teeth in Korean elderly adults aged 55-84 years. Int J Dent Hyg 2016;14:151-8. https://doi.org/10.1111/idh.12151   

3.  [3] Jun EJ, Cho HH, Kim SY, Kim HN, Kim JB. Association of the number of existing permanent teeth with the intake of macronutrients and macrominerals in adults aged 55-84 years based on the 5th KNHNES (2010-2012). J Korean Acad Oral Health 2016;40:85-91. https://doi.org/10.11149/jkaoh.2016.40.2.85   

4.  [4] Korea Health Statistics 2015: Korea National Health and Nutrition Examination Survey (KNHANES Ⅵ-3). Chungcheongbuk-do: Korea Center for Disease Control &Prevention; 2015: 1-503   

5.  [5] Ko JS. Age changes in the oral cavity. The Journal of the Korean Dental Association 1982;20:1005-10.   

6.  [6] Ku IY, Yoo JH, Han SJ, Chio BK. Basic psychology for oral health education. In: Oral health education. 5th ed. Edited by Chang KW, Hwang YS, Kim JB, Song YS, Paik DI, Choi BK, et al: Seoul; Komoonsa; 2014: 105-13.   

7.  [7] Migliorati CA, Madrid C. The interface between oral and systemic health: the need for more collaboration. Clin Microbiol Infect 2007;13:11-6. https://doi.org/10.1111/j.1469-0691.2007.01799.x   

8.  [8] Tsakos G, Steele JG, Marcenes W, Walls AWG, Sheiham A. Clinical correlates of oral health-related quality of life: evidence from a national sample of British older people. Eur J Oral Sci 2006;114:391-5. https://doi.org/10.1111/j.1600-0722.2006.00398.x.   

9.  [9] Han K, Park JB. Age threshold for moderate and severe periodontitis among Korean adults without diabetes mellitus, hypertension, metabolic syndrome, and/or obesity. Medicine 2007;96:e7835. https://doi.org/10.1097/MD.0000000000007835   

10.  [10] Bosworth HB, Bastian LA, Kuchibhatla MN, Steffens DC, McBride CM, Skinner C, et al. Depressive symptoms, menopausal status, and climacteric symptoms in women at midlife. Psychosom Med 2001;63:603-8.   

11.  [11] Ha JE, Bae KH. Reasons for extraction of permanent teeth in Korea. J Korean Acad Oral Health 2012;36:32-7.   

12.  [12] Jang SH, Choi MH. Evaluation of the quality of life related to oral health among elderly people in some elderly care facilities by OHIP-14. J Korean Soc Dent Hyg 2011;11:475-87.   

13.  [13] Shin HS, Kim HD. Association between the number of existing permanent teeth and health-related quality of life (EuroQol-5 Dimension) among adults: findings from the fifth Korea National Health and Nutrition Examination Surveys, 2012. J Korean Acad Oral Health 2015;39:303-10. https://doi.org/10.17135/jdhs.2016.16.3.217   

14.  [14] Locker D, Matear D, Stephens M, Jokovic A. Oral health-related quality of life of a population of medically compromised elderly people. Community Dent Health 2002;19:90-7.   

15.  [15] University of Ulsan College of Medicine. Developing indicators of equity in health and monitoring magnitude of socioeconomic inequality in health. Seoul: Management Center for Health Promotion; 2006: 28-31.   

16.  [16] Kim CS, Jeon JE. Trends in oral health inequality in 12-year-old Korean children: A study using the Gini coefficient. J Korean Acad Oral Health 2013;37:154-60. https://doi.org/10.11149/jkaoh.2013.37.3.154   

17.  [17] Statistics Korea. Korea statistical Information System (KOSIS), Statistics DB, Gini’ coefficient [Internet]. [cited 2018 Mar 14]. Available from: http://www.index.go.kr/potal/main/EachDtlPageDetail.do?idx_cd=1407.   

18.  [18] Kim DJ, Lee SY, Ki M, Kim MH, Kim SS, Kim YM, et al. Developing health inequalities indicators and monitoring the status of health inequalities in Korea. Seoul: Korea institute for health and social affairs; 2013: 1-567.   

19.  [19] Choi YH, Lee JH, Lee SG. Geographical disparities for oral health status in Korean adults. J Korean Acad Oral Health 2009;33:243-53.   

20.  [20] Kim MJ, Yang HJ, Lee SY. A comparative study on dental health perception and dental health behaviors among middle and high school students in the urban and rural. KJOHSM 2012;6:205-17. https://doi.org/10.12811/kshsm.2012.6.4.205   

21.  [21] Korea Centers for Disease Control and Prevention. The sixth Korea National Health and Nutrition Examination Survey (KNHANES Ⅵ). Seoul: Ministry of Health & Welfare; 2013-5.   

22.  [22] Poulsen S, Heidmann J, Vaeth M. Lorenz curves and their use in describing the distribution of ‘the total burden’ of dental caries in a population. Community Dent health 2001;18:68-71.   

23.  [23] Shkolnikov VM, Andreev EE, Begun AZ. Gini coefficient as a life table function: computation from discrete data, decomposition of differences and empirical examples. Demogr Res 2003;8:305-58.   

24.  [24] Kim JB, Choi YJ, Moon HS, Kim JB, Kim DK, Lee HS, et al. Public oral health. 4th ed. Seoul: Komoonsa;   

25.  2009: 312-7. [25] National Health Insurance Corporation. DB, Regional medical use statistics 2014. [Cited 2018 Jun 29]. Available from: http://www.nhis.or.kr/bbs7/boards/B0039/15369.   

26.  [26] National Health Insurance Corporation, Health insurance review & assesment service, Statistical Yearbook of Health Insurance. [Cited 2018 Jun 29]. Available from: http://www.nhis.or.kr/bbs7/boards/B0039/15295.   

27.  [27] Chol JG. Oral disease in the elderly. The Journal of the Korean Dental Association 1995;33:327-35.   

28.  [28] Shay K, Ship JA. The importance of oral health in the older patient. J Am Geriatr Soc 1995;43:1414-22. https://doi.org/10.1111/j.1532-5415.1995.tb06624.x.   

29.  [29] Kim SW, Han K, Kim SY, Park CK, Rhee CK, Yoon HK. The relationship between the number of natural teeth and airflow obstruction: a cross-sectional study using data from the Korean National Health and Nutrition Examination Survey. Int J Chron Obstruct Pulmon Dis 2015;11:13-21. https://doi.org/10.2147/COPD.S94419.   

30.  [30] An SH. Effect of the number of existing permanent teeth and removable dentures on nutrient intakes in Korean adults aged 55 years or more[Doctoral dissertation]. Busan: Univ. of Pusan, 2017.   

31.  [31] Stock C, Jürges H, Shen J, Bozorgmehr K, Listl S. A comparison of tooth retention and replacement across 15 countries in the over-50s. Community Dent Oral Epidemiol 2016;44:223-31. https://doi.org/10.1111/cdoe.12209.   

32.  [32] Steele J, Shen J, Tsakos G, Fuller E, Morris S, Watt R, et al. The interplay between socioeconomic inequalities and clinical oral health. J Dent Res 2015;94:19-26. https://doi.org/10.1177/0022034514553978.   



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