Relationship between Malocclusion and Heart Rate Variability Indices in Young Adults

D. Ekuni; N. Takeuchi; M. Furuta; T. Tomofuji; M. Morita

doi:10.3414/ME10-01-0045

Methods of Information in Medicine, Table of Contents

Methods Inf Med 2011; 50(04): 358-363
DOI: 10.3414/ME10-01-0045

Original Articles

Schattauer GmbH

Relationship between Malocclusion and Heart Rate Variability Indices in Young Adults

A Pilot Study

D. Ekuni

¹Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

,

N. Takeuchi

¹Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

,

M. Furuta

¹Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

,

T. Tomofuji

¹Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

,

M. Morita

¹Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

› Author Affiliations

Abstract

Summary

Objectives: Heart rate variability (HRV) has been used to assess sympathetic and parasympathetic modulation of heart rate. Chronic stress relates to reduced HRV. Malocclusion has effects on quality of life, which can lead to chronic stress. Therefore, we hypothesized that malocclusion, as chronic stress, may contribute to reduced HRV. The aim of this study was to investigate the relationship between malocclusion and HRV indices in healthy young adults.

Methods: Thirty-seven non-smoking healthy subjects, aged 22 to 25 years, were examined. Malocclusion was defined by Angle classification. HRV indices included root mean square of successive differences, low frequency (LF), high frequency (HF) and ratio of LF to HF. The effects of malocclusion on quality of life and mental health were assessed using self-reported questionnaires, the condition-specific Oral Impacts on Daily Performances index (CS-OIDP) and the Hopkins Symptoms Checklist (HSCL), respectively.

Results: Significantly lower score of HF and higher heart rate (HR) level and CS-OIDP score were observed in subjects with malocclusion (n = 17) compared to those in the control subjects (n = 20) (P < 0.05). There was a positive correlation between HR and score of “anxiety” in HSCL (P < 0.05).

Conclusions: The data showed an association between malocclusion and lower HRV. Based on our results, orthodontic treatment might contribute not only to improvement of oral esthetic and functional problems but also to improvement of stress and HRV indices.

Keywords

Malocclusion - heart rate variability - oral health-related quality of life - young adult - high frequency

Full Text

References

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