Joint Vibrations Analysis in Asymptomatic Volunteers and Symptomatic Patients

Comparison of TMJ vibration frequencies under different joint conditions

“…TMJ disc displacement with reduction is a more specific diagnosis. 110 TMD is not a diagnosis because with its high degree of ambiguity, TMD does not give any specific indication as to which of the 20 or 30 possibilities that can fall under this commonly used acronym is actually present. 111 TMD can only be a diagnosis if one believes that TMD is strictly one condition that emits a wide variety of signs and symptoms, but has one uniform etiology.…”

“…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.…”

Temporomandibular Joint Vibration Before and After Exercises and Occlusal Splints

“…19Y22 Joint hypermobility coming from decreased physical fitness is one of the conditions that leads joint structures to vibrate more easily during the passage of synovial liquid from the anterior to the posterior compartment, as proposed. 9 The remission of pain in patients after treatment with occlusal stabilizer splint and permanence of late clicking suggests the presence of ligament laxity that permits disk movement producing clicking. The patients of this study have sounds at the end of the opening and at the beginning of the closing cycle, verified by auscultation and palpation, and presented muscular and/or articular pain.…”

“…Internal derangements can be caused by a lubrication problem, 3,4 incorrect relation of the condyle and disk, 5,6 morphologic alterations at the articular surfaces, 7 ligament alteration, 8 and also a biomechanical alteration that comes from an incoordination of mandibular elevator muscles and superior lateral pterygoid muscle. 9 Different methods to analyze sound have been used, such as palpation and auscultation. 10 Different types of sensors have been used, such as microphones, 8 accelerometers, 9 or a combination of a microphone and a stethoscope.…”

“…9 Different methods to analyze sound have been used, such as palpation and auscultation. 10 Different types of sensors have been used, such as microphones, 8 accelerometers, 9 or a combination of a microphone and a stethoscope. 11 Verbal descriptions of sounds recorded by auscultation are not suited for comparisons between observers.…”