アブストラクト（31巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Clinical Diagnostic Potential using TMJ Sounds to Characterize the Status of the Articular Disk
Subtitle　： ORIGINAL ARTICLES
Authors　： Katsuhiko Kimoto, Katsushi Tamaki, Norio Hori, Minoru Toyoda
Authors（kana）　：
Organization　： Department of Prosthodontics, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 31
Number　： 1
Page　： 9-16
Year/Month　： 2003 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： The aim of this study is first to determine whether an analysis of temporomandibular joint (TMJ) sounds can adequately characterize the differential stages of the intra-articular structure and second to evaluate the accuracy with which the status of articular disks can be characterized for people who have a temporomandibular disorder (TMD). Seventy-eight symptomatic TMJs of 45 patients (mean age 28.4 years) were consecutively selected from among the TMD population. We compared the total energy value of the TMJ sound and the state of disk displacement, as determined by MRI, and we found them to be significantly different (P<0.01) in the opening phase. After this comparison, we calculated the diagnostic accuracy for identifying five types of TMJ: normal position (NO), partial disk displacement with reduction (PA), suspected disk perforation (PE), complete disk displacement with reduction (CO), and disk displacement without reduction (WO). The diagnostic accuracy for identifying the CO and the NO group among the TMD population was 83.3 and 75.6%, respectively, when using 15 mV and 80 mV as cut-off points. Within the limits of this study, it is suggested that patients showing NO and CO groups can be diagnosed using an electric analysis of TMJ sound analysis among the TMD population. However, this method is not yet accurate enough to diagnose articular disk status.
Practice　： Dentistry
Keywords　： TMJ sounds, Articular-disk status, Cut-off point, Diagnostic accuracy