Document Detail

Quantitative evaluation of toothbrush and arm-joint motion during tooth brushing.
MedLine Citation:
PMID:  25467235     Owner:  NLM     Status:  Publisher    
OBJECTIVES: It is very difficult for dental professionals to objectively assess tooth brushing skill of patients, because an obvious index to assess the brushing motion of patients has not been established. The purpose of this study was to quantitatively evaluate toothbrush and arm-joint motion during tooth brushing.
MATERIALS AND METHODS: Tooth brushing motion, performed by dental hygienists for 15 s, was captured using a motion-capture system that continuously calculates the three-dimensional coordinates of object's motion relative to the floor. The dental hygienists performed the tooth brushing on the buccal and palatal sides of their right and left upper molars. The frequencies and power spectra of toothbrush motion and joint angles of the shoulder, elbow, and wrist were calculated and analyzed statistically.
RESULTS: The frequency of toothbrush motion was higher on the left side (both buccal and palatal areas) than on the right side. There were no significant differences among joint angle frequencies within each brushing area. The inter- and intra-individual variations of the power spectrum of the elbow flexion angle when brushing were smaller than for any of the other angles.
CONCLUSIONS: This study quantitatively confirmed that dental hygienists have individual distinctive rhythms during tooth brushing. All arm joints moved synchronously during brushing, and tooth brushing motion was controlled by coordinated movement of the joints. The elbow generated an individual's frequency through a stabilizing movement.
CLINICAL RELEVANCE: The shoulder and wrist control the hand motion, and the elbow generates the cyclic rhythm during tooth brushing.
Emi Inada; Issei Saitoh; Yong Yu; Daisuke Tomiyama; Daisuke Murakami; Yoshihiko Takemoto; Ken Morizono; Tomonori Iwasaki; Yoko Iwase; Youichi Yamasaki
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-4
Journal Detail:
Title:  Clinical oral investigations     Volume:  -     ISSN:  1436-3771     ISO Abbreviation:  Clin Oral Investig     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-3     Completed Date:  -     Revised Date:  2014-12-4    
Medline Journal Info:
Nlm Unique ID:  9707115     Medline TA:  Clin Oral Investig     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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