Analysis of Toothbrushing Motion with High Precision Motion Capture

DOI Open Access
  • YU Yong
    Department of Mechanical Engineering, Graduate School of Science and Engineering, Kagoshima University
  • KODAMA Mizuki
    Department of Mechanical Engineering, Graduate School of Science and Engineering, Kagoshima University
  • INADA Emi
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
  • SAITOH Issei
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University
  • TOMIYAMA Daisuke
    Department of Mechanical Engineering, Graduate School of Science and Engineering, Kagoshima University
  • TAKEMOTO Yoshihiko
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
  • MURAKAMI Daisuke
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
  • MORIZONO Ken
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
  • SIMOTAHIRA Takako
    Clinical Technical Department, Kagoshima University Medical and Dental Hospital
  • FUKUSHIGE Masami
    Clinical Technical Department, Kagoshima University Medical and Dental Hospital
  • KITAUE Mayumi
    Clinical Technical Department, Kagoshima University Medical and Dental Hospital
  • YAMASAKI Youichi
    Division of Pediatric Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University

Bibliographic Information

Other Title
  • 高精度モーションキャプチャシステムを用いた刷掃動作の解析
  • 第4報：利き手と非利き手の刷掃動作の比較と解析
  • Fourth Report: Analysis and Comparison of Arm Movement between Dominant and Non-dominant Hand

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Abstract

<p>The pen grip is one of the recommended methods for holding a toothbrush, as it allows careful control of movement by the fingers. However, toothbrushing with a pen grip may be difficult for children because of limited dexterity. We evaluated the brushing movements in adults when toothbrushing with their non-dominant hand to simulate the instable movements of children.</p><p>Dental hygienists were employed as subjects, and asked to brush the buccal and palatal sides of the right and left upper molars. Toothbrush motion frequency and the joint angles of the shoulder, elbow,and wrist were examined. Furthermore, the motions of the toothbrush and arm during brushing were evaluated and compared between brushing with the dominant and non-dominant hand.</p><p>Study conclusions :</p><p>1)The peak frequency and effective arm motion while brushing the upper buccal left and palatal right and left molars were different between brushing with the dominant and non-dominant hand.</p><p>2)When brushing the upper left molars, a significant difference was noticed for peak frequency and effective arm motion when brushing with the dominant and non-dominant hand.</p><p>3)All arm joints must move in a synchronous manner in order to enable reciprocal motion of the toothbrush while brushing with a pen grip.</p><p>Our findings suggest that arm motion during tooth brushing with the dominant hand using a pen grip requires a certain level of learning and proficiency, while the coordinated movements of the joints of arm are reflected in reciprocal motion of the toothbrush.</p>

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