[Evaluation of masticatory comminute function using multiple variables--Part II: Analysis of masticatory efficiency from EMG duration].
For analysis of parameters, which can represent stomatognathic function, a possibility for the estimation of masticatory efficiency without analyzing food comminution was shown in Part I. Since there is a necessity for more precise estimation of masticatory efficiency to enable comparison with other parameters, the variance from the central value of food particle size was quantified and a new evaluation of masticatory efficiency, which can be adapted to any comminuted foods and has a good reproducibility was devised. The relationship between the masticatory efficiency originating from the side of comminuted food and the parameters that represent a variance of electromyogram (EMG) duration was analyzed. Then, the total variances of EMG duration, originating from working side masseter, corresponding to the task, which is consumed by food comminution, were calculated. That is the masticatory efficiency, which can be found from the side of EMG. A negative correlation between masticatory efficiencies, originating from the sides of food comminution and power supply was found. Therefore, estimation of masticatory efficiency using EMG measurements from the side of EMG may be possible.
Tanaka
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Department of Prosthodontics II, Faculty of Dentistry, Tokyo Medical and Dental University.
D000328:Adult; D004576:Electromyography; D006801:Humans; D008297:Male; D008409:Mastication / Q000502:physiology*; D008962:Models, Theoretical; D015999:Multivariate Analysis