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Masticatory Performance Measured with a Chewing Gum Containing Spherical Resinous Microparticles
Int J Clin Prev Dent 2018;14(4):256-263
Published online December 31, 2018;
© 2018 Korean Academy of Preventive Dentistry.

Toshiya Kanazawa, Takashi Zaitsu, Masayuki Ueno, Yoko Kawaguchi

Department of Oral Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan
Correspondence to: Takashi Zaitsu
Department of Oral Health Promotion, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. Tel: +81-3-5803-5476, Fax: +81-3-5803- 0194, E-mail:
Received October 22, 2018; Accepted November 2, 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.
Objective: This study aimed to investigate the factors associated with masticatory performance, as measured with a chewing gum containing spherical resinous microparticles, and to evaluate the method by examining the relationship with self-reported masticatory status.
Methods: The participants in this study comprised 903 industrial workers (mean age, 42.2±11.6 years). A questionnaire was administered to assess self-reported masticatory status. The masticatory performance score was calculated by counting the number of particles in the chewing gum. Clinical oral examinations were administered. Multiple linear regression analysis was conducted on the masticatory performance scores to examine the related factors. Analysis of covariance was conducted to investigate the association between the masticatory performance score and the self-reported masticatory status.
Results: Significant predictors of the masticatory performance score were sex (p<0.001), age (p<0.001), decayed teeth (p=0.009), total-functional tooth units (p<0.001), periodontitis (p=0.003), and malocclusion (p=0.011). The relationship between the masticatory performance score and the self reported masticatory status was attenuated after controlling for confounding factors.
Conclusion: The masticatory performance increased with age and decreased as the oral health status worsened. Using this chewing gum method partly, but not comprehensively, reflects masticatory performance. Therefore, various masticatory performance-related indexes should be employed to measure masticatory performance accurately.
Keywords : masticatory performance, measurement, oral health status, self-reported masticatory status, chewing gum

December 2018, 14 (4)