Tooth brushing pattern classification using three-axis accelerometer and magnetic sensor for smart toothbrush.
The concept of intelligent toothbrush, capable of monitoring brushing motion, orientation through the grip axis, during toothbrushing was suggested in our previous study. In this study, we describe a tooth brushing pattern classification algorithm using three-axis accelerometer and three-axis magnetic sensor. We have found that inappropriate tooth brushing pattern showed specific moving patterns. In order to trace the position and orientation of toothbrush in a mouth, we need to know absolute coordinate information of toothbrush. By applying tilt-compensated azimuth (heading) calculation algorithm, which is generally used in small telematics devices, we could find the inclination and orientation information of toothbrush. To assess the feasibility of the proposed algorithm, 8 brushing patterns were preformed by 6 individual healthy subjects. The proposed algorithm showed the detection ratio of 98%. This study showed that the proposed monitoring system was conceived to aid dental care personnel in patient education and instruction in oral hygiene regarding brushing style.
Lee
Kang-Hwi
KH
Biomedical Engineering Department, Konkuk University, Chungju, Korea. kku99lkh@kku.ac.kr
Lee
Jeong-Whan
JW
Kim
Kyeong-Seop
KS
Kim
Dong-Jun
DJ
Kim
Kyungho
K
Yang
Heui-Kyung
HK
Jeong
Keesam
K
Lee
Byungchae
B
D006801:Humans; D008280:Magnetics; D008962:Models, Theoretical; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D010353:Patient Education as Topic; D014099:Toothbrushing / Q000379:methods*