Characteristics of Temporomandibular Joint Vibrations in Anterior Disk Displacement With Reduction in Adults

Abstract

The objective to the present study was to compare temporomandibular joint (TMJ) vibration in anterior disk displacement with reduction (ADDWR) in adults and to explore the diagnostic value of frequency spectrography of TMJ vibrations. Twenty-one patients with ADDWR formed the case group and were further divided into three subgroups according to the degree of disk displacement, and 26 symptomless adults formed the control group. The joint vibration was recorded during rhythmic maximal open-close jaw movement using JVA/JT, BioPAK (Bioresearch, Inc., Brown Deer, WI)). The sensitivity and specificity of the total integral for diagnosis of ADDWR was calculated. All TMJ vibration parameters, including total integral, integral>300Hz, integral<300Hz, >300/<300 ratio, peak amplitude, peak and median frequencies of the case group were significantly higher than that of the control group. Along with the degree of disk displacement, the amplitude and frequency of TMJ vibrations increased, and the total integral significantly increased. The total integral demonstrated high sensitivity and specificity for diagnosis of ADDWR (85.7% and 84.6%, respectively). TMJ vibration was significantly higher in adults with ADDWR than that in the symptomless control group. Different pathological stages of disk displacement have different TMJ vibrations.

The reproducibility of temporomandibular joint vibrations over time in the human

“…Computer‐assisted vibration analyses may help identify these patterns and may help distinguish among various TMJ disorders. The technique of JVA (BioPAK) has been reported to have a unique capability to evaluate TMJ injuries, internal derangements, and degenerative conditions precisely, quickly, inexpensively and non‐invasively .…”

Diagnostic concordance between MRI and electrovibratography of the temporomandibular joint of subjects with disc displacement disorders

“…The EVG analysis of the TMJ could assist clinicians in their diagnosis of TMJ sounds with sensitivities and specificities of 0.75-0.95 5 in distinguishing between normal subjects and those with ADDwR, articular disc displacement with reduction; ADDw/oR, articular disc displacement without reduction; TMJ, temporomandibular joint. 26 considering the MR as the gold standard, when the total integral of the joint sounds was considered. Mazzetto et al showed that a complete analysis of the joint sounds by EVG (amplitude and frequency domains) should provide complete information for a diagnostic classification of the observed TMJs.…”

Comparison of TMJ vibration frequencies under different joint conditions

“…This has led to the perception that low frequencies are generated by the soft tissues, the disc and/or cartilage. 40,44 Higher frequencies, relatively speaking, are perceived to be a sign of hard tissues, bone against bone, etc. rubbing together and without proper lubrication.…”

“…Many different systems, equipments and methods have been used in the past to accomplish the recording and analysis of TMJ vibration data. 5,10,13,18,20,21 More recent results from studies of electrovibratography, [23][24][25][26][27] joint vibration analysis (JVA), [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] sonography, [44][45][46] electro-sonography [47][48][49][50] and doppler auscultation [51][52][53][54] have been mixed, although far more successful classifications have been published than failures. However, a few dentists have been skeptical of the usefulness of TMJ vibration measurements.…”