Influence on force curve exerted by jaw tapping force.
The purpose of this study, which made use of visual biofeedback, was to determine how methods of regulating jaw tapping force differed depending on the strength of the tapping, using the force curve as an index. Nine healthy examinees were asked to make 30-35 jaw tapping movements, reproducing the defined target tapping force as accurately as possible. We measured the duration of the tooth contact phase, the time to peak force, the first time derivative of force (peak dF/dt), and the time to peak dF/dt. The results indicated that the duration of the tooth contact phase and the time to peak force increased with the target value (P < 0.01). As the target rose, the peak dF/dt increased significantly (P < 0.01), but the time to peak dF/dt was not significant (P=0.134). We found that the higher the target value, the greater the degree of dependency on feedback information. We also found that both the peak dF/dt and the time to peak dF/dt were determined for each examinee prior to movement.
Suenaga
H
H
Graduate School of Dentistry, Nagasaki University, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan. suen@dh.nagasaki-u.ac.jp
Torisu
T
T
Yoshimatsu
T
T
Fujii
H
H
D000328:Adult; D001732:Bite Force; D003799:Dental Stress Analysis / Q000379:methods*; D005246:Feedback; D005260:Female; D006801:Humans; D008297:Male; D010474:Percussion; D012026:Reflex, Stretch / Q000502:physiology