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Relationship between bone mineral density and the remaining teeth in Korean adults

Song， Hye Jeong 1,  LEE， DUK HEE 2

1마산대학교
2경북대학교

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ABSTRACT

Objectives: The purpose of the study is to investigate the relationship between bone mineral density and remaining teeth in Koreanadults. Methods: Using National Health and Nutrition Examination Survey(KNHANES) 5th Year 1(2010), 1,985 adults over 50 years oldhaving bone mineral density test were selected. Male adults were 883, and female adults were 1,102. The raw data consisted ofgeneral characteristics of the subjects, bone density data, and oral examination data. The questionnaire consisted of general healthsurvey, laboratory examination study, and nutrition study. Data were analyzed using SPSS 18.0 program for multiple regressionanalysis, ANOVA, t-test. The variables included general characteristics of the subjects, health behavior, diet habit, and oral healthbehavior. General characteristics consisted of gender, age, residence area, education level, marital status, monthly income, andvocation. Health behavior consisted of smoking, alcohol drinking, body mass index(BMI), physical activity, and mental health. Diethabit consisted of frequency of meal, milk, coffee, and calcium ingestion. Oral health behavior consisted of frequency of toothbrushing, use of oral health care devices, and oral examination. Systemic diseases were measured by the questionnaire forhypertension, diabetes mellitus, and hyperlipidemia. Bone density was measured in T-score of femoral bone, neck of femur, andlumbar vertebrae. Bone density was classified into normal(T-score ≥ -1.0), osteopenia(-2.5 < T-score < -1.0), and osteoporosis(T-score ≤ -2.5). The remaining teeth were measured by the differences between normal teeth and missing teeth. Results: Smoking and age are the most influencing factors on the number of remaining teeth and bone density(p<0.01)(p<0.05). Those who had higher bone density, younger age, and nonsmoker significantly had more remaining teeth. Those who were men,diabetic, lowly educated women, and low birth weighted persons tended to have less number of teeth(p<0.01). Conclusions: The study suggested that there were significant differences between men and women according to the oral healthmanagement behavior and systemic disease control. Proper management of the oral health and good quality of bone mineral densitycan reserve the remaining teeth through the whole life.

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