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Time-frequency analysis of temporomandibular joint (TMJ) clicking sounds using radially Gaussian kernels

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5 Author(s)
Sungyub Yoo ; Dept. of Electr. Eng., Pittsburgh Univ., PA, USA ; Boston, J.R. ; Rudy, T.E. ; Greco, C.M.
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Temporomandibular joint (TMJ) sounds and motion were recorded during two clinically-derived movements-simple jaw opening and jaw protrusion followed by opening-from ten patients. A new time-frequency method-radially Gaussian kernel distribution-was applied to classify the TMJ clicking sounds into six groups, type I to type VI, based on the time-frequency patterns of energy distribution. The number of clicks and percentage of each type were examined. Relations between the two movements were examined by the prevalence of each type. A detailed classification of TMJ clicking sounds is provided by time-frequency patterns and may provide a better understanding of temporomandibular disorders.

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Biomedical Engineering, IEEE Transactions on  (Volume:48 ,  Issue: 8 )