A study on functional disorders of intra-articular structures using TM J sounds:Application of a frequency analyzing method by time sequences

概要

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TMJ sound is one of the major symptoms caused by TMJ internal derangements. Consequently, a quantitative study is mandatory and significant from a clinical standpoint. The purpose of this study is to determine an assessment standard using TMJ sounds in regard to functional disorders caused by TMJ components.Sound waveforms during mandibular movements are generally non-stationary signals which have frequency and time characteristics.However, conventional Fouries analysis has not included these time elements. Therefore, in this study, a frequency analyzing method by time sequences was devised for obtaining objective assessments using TMJ sounds in functional disorders caused by TMJ components. The method was used with three subjects and the results were compared with information from MR imaging. The results are as follows, (1) A new analyzing method based on mandibular movements allowed us to record the time period of occurrence of TMJ sounds and frequency modes between sounds at an initial session and other sectional sessions.(2) Comparing subjects whoes mandibular condition was shown as different by MR imaging, this analyzing method also showed differences in waveforms and frequency modes.(3) An application of this new analyzing method seems to he clinically useful.
一般社団法人日本顎関節学会の論文