アブストラクト（24巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Clinical Diagnostic Potential of Internal Derangement by TMJ Sounds
Subtitle　： ORIGINAL ARTICLES
Authors　： Katsuhiko Kimoto, Hideo Aoki, Katsushi Tamaki, Motoki Fujiwara, Tadahiro Fujita
Authors（kana）　：
Organization　： Department of Crown and Bridge Prosthodontics, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 24
Number　： 2
Page　： 73-77
Year/Month　： 1996 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] The TMJ sound is one of the major symptoms accompanying the internal derangement of TMJ, and has been accepted as a vital sign of abnormality of the intra-articular structure. The following two experiments were conducted to evaluate the diagnostic potential of TMJ sounds. In the first experiment, the sound wave displayed by STFT (Short Time Fouries Transformation) was compared with magnetic resonance imaging (MRI) findings using one patient with a typical complex wave. In the second experiment, the diagnostic accuracy, sensitivity and specificity were calculated between 74 symptomatic TMJs with internal derangement and 14 asymptomatic normal TMJs using Total Energy Value (TEV). The frequency bands were strikingly altered by the differences in the TMJ sound waves, allowing for an observation of functional disorder of intra-articular structure through TMJ sound in the first experiment. In the second experiment, diagnostic accuracy was 79.5%, and diagnostic sensitivity and specificity were 79.7% and 78.5% respectively at a cut off point of 40 mv2 using TEV. Therefore, the results demonstrated that by applying STFT, the TMJs between normal joint anatomy and internal derangement could be differentiated.
Practice　： Dentistry
Keywords　： Internal derangement, TMJ sounds, MRI, Diagnostic test