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Working Conditions of Dental Hygienists Employed in Japanese Hospitals
Int J Clin Prev Dent 2019;15(1):48-55
Published online March 30, 2019;
© 2019 International Journal of Clinical Preventive Dentistry.

Kouji Wada1, Noriko Takei2, Noriko Kanazawa3, Tomoe Miyoshi4, Kanako Noritake4

1Health Insurance Claims Review and Reimbursement Services, 2The Lion Foundation for Dental Health, 3Japanese Foundation for Oral Health Promotion, 4Oral Diagnosis and General Dentistry, University Hospital of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan
Correspondence to: Kanako Noritake, E-mail:,
Received February 7, 2019; Revised March 14, 2019; Accepted March 22, 2019.
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.
Objective: Although the number of dental hygienists employed in hospitals has increased in recent years, few studies have examined their working conditions. The purpose of this study was to analyze the working conditions of dental hygienists employed in hospitals, and to investigate any differences according to hospital characteristics.
Methods: This study was based on anonymous data obtained in the Survey of Dental Hygienists Working at Hospitals conducted by the Japan Dental Hygienists Association in December 2016. Among the 1,163 respondents, 1,085 answered questions regarding the number of beds and the dental-related clinical specialties in the hospital where they work, were included in this study. Based on the number of beds and dental-related specialties, hospitals were divided into four groups. The chi-square test was used to test the differences in proportions between the groups. p-values less than 0.05 were considered statistically significant.
Results: Among the four groups, there were significant differences in respondent age, length of service, the reasons why respondents were initially hired in the hospitals, the number of dental-related specialties claimed by the hospitals, and the main focus of the hospitals (such as ambulatory service or inpatient service) (p<0.05).
Conclusion: This study revealed significant differences in the working conditions of dental hygienists depending on the size and characteristics of the hospitals.
Keywords : dental hygienist, hospital, working conditions

March 2019, 15 (1)