Temporomandibular Joint Vibration Analysis in a Sample of Non-Patients

Christensen, Larry; Donegan, Sara Jean; McKay, Duane C.; Lewin, Arthur

doi:10.1080/08869634.1992.11677889

Cited by 18 publications

(15 citation statements)

References 3 publications

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“…Thirty‐eight per cent of the sounds had their energy peaks in the 1000–2000 Hz octave bands. This is contrary to reports that claim that TMJ sounds have their energy peaks below 1000 Hz and only insignificant energy above that limit (Christensen & Donegan, 1992; Ishigaki et al , 1993). Knowledge about the true bandwidth of TMJ sounds is important when selecting the appropriate sensors.…”

Section: Discussioncontrasting

confidence: 82%

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Amplitude and frequency spectrum of temporomandibular joint sounds from subjects with and without other signs/symptoms of temporomandibular disorders

Sano¹,

Widmalm²,

Westesson³

et al. 1999

J of Oral Rehabilitation

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Temporomandibular joint (TMJ) sound is one of the most commonly recognized signs in patients with temporomandibular disorders (TMD) but is also frequently seen in asymptomatic individuals. Sound recording is therefore only meaningful if the sounds from a normal healthy joint can be differentiated from those in patients. In this study, the amplitude and power spectrum of the TMJ sounds from symptomatic patients and asymptomatic individuals were recorded and compared. The result showed that TMJ sounds from symptomatic patients had a larger amplitude than sounds from asymptomatic subjects. A significant proportion of sounds had frequencies between 2000 and 3000 Hz. It was concluded that the characteristic amplitude is worthy of further study as a sign of possible diagnostic value. Secondly, the bandwidth of the sensors used at electronic TMJ sound recording should not be less than 3000 Hz.

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Section: Discussioncontrasting

confidence: 82%

“…A large part of the TMJ sound recordings discussed in the literature have been made using accelerometers placed in contact with the skin over the TMJ (Christensen & Donegan, 1992; Ishigaki et al , 1993). Accelerometers are widely used for vibration analysis in engineering applications.…”

Section: Discussionmentioning

confidence: 99%

Amplitude and frequency spectrum of temporomandibular joint sounds from subjects with and without other signs/symptoms of temporomandibular disorders

Sano¹,

Widmalm²,

Westesson³

et al. 1999

J of Oral Rehabilitation

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show abstract

“…The study confirmed that TMJ sounds are common in a non-patient population (subjects that did not have any subjective need for treatment), and more common in females than in males (Egermark- Eriksson, 1982;Wanman & Agerberg, 1990;Christensen et al, 1992). The lower curve shows the lowest level of sound that can be detected and the upper curve indicates where sound is beginning to feel painful.…”

Section: Discussionsupporting

confidence: 81%

Classification of temporomandibular joint sounds based upon their reduced interference distribution

Widmalm

Williams

Christiansen

et al. 1996

J of Oral Rehabilitation

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Temporomandibular joint (TMJ) sounds were recorded in 98 orthodontic retention patients, mean age 19 +/- 8.6 (s.d.) years, by interview, auscultation and electronic recording. Sounds were found by auscultation in 41% and by interview in 32% of the subjects, more often in females than in males (P < 0.05). A new method for time-frequency analysis, the reduced interference distribution (RID), was used to classify the electronic sound recordings into five subclasses, RID types 1-5, based upon location and number of their energy peaks. RID types 1-3 had a few energy peaks close in time. RID types 4-5, typical of subjects with crepitation, had multiple energy peaks occurring close in time for a period of 20-300 ms. RID type 1, found in 45% of the subjects, typical of patients with clicking, had its dominant energy peak located in a frequency range < 600 Hz and was significantly more common in the female than in the male subjects (P < 0.01). RID type 2, found in 68% of the subjects, with the dominant peak in the range 600-1200 Hz, and RID type 3, found in 38% of the subjects, with the peak in the frequency range > 1200 Hz, were found to have a similar gender distribution. RID type 4, found in 49% of the subjects, had the energy peaks distributed in the frequency range < 600 Hz. RID type 5, found in 43% of the subjects, more often in females than in males (P < 0.05), had the peaks distributed over the whole frequency range from about 30 Hz up to about 3000 Hz. In conclusion, a more detailed classification could be made of the TMJ sounds by displaying the RIDs than by auscultation. This suggests that RID classification methods may provide a means for differentiating sounds indicating different types of pathology.

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“…Although the results seem to be reliable, as many as 25% of normal joints have been erroneously diagnosed as being abnormal using this technique. 21 Studies of vibration analysis have concluded that there is no clinical advantage to its use over a conventional stethoscope. 2…”

Section: Diagnostic Devicesmentioning

confidence: 99%

The treatment and diagnosis of temporomandibular disorders using high‐tech devices

Dodes¹

2013

Focus on Alt & Comp Therapy

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Temporomandibular Joint Vibration Analysis in a Sample of Non-Patients

Cited by 18 publications

References 3 publications

Amplitude and frequency spectrum of temporomandibular joint sounds from subjects with and without other signs/symptoms of temporomandibular disorders

Amplitude and frequency spectrum of temporomandibular joint sounds from subjects with and without other signs/symptoms of temporomandibular disorders

Classification of temporomandibular joint sounds based upon their reduced interference distribution

The treatment and diagnosis of temporomandibular disorders using high‐tech devices

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