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Analysis of Oral Pathogenic Microorganisms by Elderly's Systemic and Oral Health Status of the Elderly Over 65 Years
Biomed Sci Letters 2018;24:372-379
Published online December 31, 2018;
© 2018 The Korean Society For Biomedical Laboratory Sciences.

Min-Kyung Lee1,*, Su-Bin Yu2,* and Hye-Jin Kim1,†,*

1Department of Biomedical Health Science, Dong-eui University, Busan 47340, Korea
2Department of Oral Anatomy, School of Dentistry, Pusan National University, Busan 50612, Korea
Correspondence to: *Professor.
Hye-Jin Kim. Department of Biomedical Health Science, Dong-eui University, 176 Eongwangno (gayadong san24), Busanjin-gu, Busan 47340, Korea.
Tel: +82-51-890-4237, Fax: +82-50501826878, e-mail:
Received November 12, 2018; Revised December 10, 2018; Accepted December 11, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Korean society is experiencing rapid growth due to industrialization and urbanization, and the aging of population is emerging. Degradation of the masticatory muscle due to aging and reduction of the number of mastications causes dry mouth syndrome with decreased saliva in the elderly. Changes in the amount and composition of saliva cause various oral diseases, especially, periodontal disease is closely related to the microorganisms that form the plaque. In the elderly education, stimulation saliva was collected at the first visit and the last visit to observe changes in microorganisms in the oral cavity. For the collection of the probes, the paraffin wax was chewed for 5 minutes. The samples were immediately refrigerated in a 50 cc plastic tube and then stored at -20°C until the next use. The subjects of this study were the elderly people aged 65 years or older, and the study was conducted on 16 persons, 3 males and 13 females. The distribution of saliva microorganisms according to rolling brushing method showed significant difference in all three groups (Aa & Red complex, Orange complex and Green complex) before and after the education. In the group who answered that they had dentures, it was confirmed that the amount of microorganisms before and after education was significantly reduced in all three groups. There was a significant decrease in the amount of microorganisms in the Aa & Red complex and Orange complex group in the case of hypertension related to systemic disease. In conclusion, the higher the interest of oral health and general health of the subjects, the more effective the education.
Keywords : Aged, Microbial, Periodontitis