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Journal Article


Hwang HY, Choi JS, Kim HE. Gerodontology 2018; ePub(ePub): ePub.


Department of Dental Hygiene, College of Health Science, Gachon University, Incheon, Republic of Korea.


(Copyright © 2018, Gerodontology Society and John Wiley & Sons, Publisher John Wiley and Sons)






OBJECTIVE: To evaluate whether masticatory efficiency is associated with dynamic postural balance.

BACKGROUND: Masticatory dysfunction can cause deterioration of general health due to nutritional imbalances, thereby negatively affecting postural balance. However, few studies have investigated the association between masticatory efficiency and postural balance.

MATERIALS AND METHODS: The masticatory efficiency of 74 participants was evaluated by calculating mixing ability index (MAI) using a wax cube. The timed up and go test (TUGT) was used to measure dynamic balance. Participants with an MAI above or below the median value of 1.05 were defined as having high or low masticatory efficiency, respectively. An independent samples t-test was used to identify significant differences in TUGT, according to masticatory efficiency. Analysis of covariance was performed to adjust for confounding factors. Logistic regression analysis was used to assess the correlation between masticatory efficiency and postural balance.

RESULTS: The high masticatory efficiency group could complete the TUGT exercise approximately 1.67 seconds faster while maintaining the postural balance, compared to the low masticatory efficiency group (P = .005). Furthermore, the postural imbalance odds of the group with high mastication efficiency decreased by 0.14-fold, relative to the group with low mastication efficiency (95% confidence interval: 0.04-0.46).

CONCLUSION: With some reservations about statistical power, the association found between masticatory efficiency and postural balance justifies further investigations to confirm the strength of the associations, and possibly to identify causal relationships between mastication and posture in old age.

© 2018 John Wiley & Sons A/S and The Gerodontology Association. Published by John Wiley & Sons Ltd.

Language: en


mastication; mixing ability index; postural balance; timed up and go test


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