J Dent Rehabil Appl Sci.  2016 Mar;32(1):38-46. 10.14368/jdras.2016.32.1.38.

Study for discriminating method of origin side vibration from non-symptomatic clicking group

• Jung DU
• Kang DW

• KMID: 2162378
• DOI: http://doi.org/10.14368/jdras.2016.32.1.38

Abstract

PURPOSE
study for discriminating method of origin side vibration from non-symptomatic clicking group.
MATERIALS AND METHODS
60 joints vibrations of 30 subjects in non-symptomatic clicking group was recorded via subject's awareness, examiner's palpation and JVA analysis. Origin side vibration was discriminated with consideration for frequency spectrum, time delay and phase shift of waveforms, analysis of numeric values.
RESULTS
There were all unilateral vibrations with JVA analysis and number of origin vibrations were 42. 11 pairs of vibrations showed time delay and phase shift and transferred side vibrations showed smaller values of total integral and bigger values of > 300 / < 300 ratio than origin side vibrations except one pair of vibrations. Also as the ipsi-lateral joint vibrations with smaller values of total integral showed bigger values of > 300 / < 300 ratio than the contra-lateral joint vibrations and there all ipsi-lateral vibrations were showed small values of total integral below 10 and hard to detect time delay and phase shift. So the features were used in discrimination of origin side vibrations.
CONCLUSION
There should be all-around considerations for discrimination of origin side vibrations that is frequency spectrum, phase shift and time delay and analysis of numeric values.

Keyword

temporomandibular joint; vibration; differential diagnosis

MeSH Terms

Diagnosis, Differential
Discrimination (Psychology)
Joints
Palpation
Temporomandibular Joint
Vibration*

Figure

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  Fig. 1 Irregular pattern of frequency spectrum along with small values of total integral below 10 in both side vibrations was discriminated as background noise or errors in recordings.

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  Fig. 2 Time delay and phase shift in waveforms of vibrations. There is transferred vibration in right side overlapped in lower waveform of left side vibration. Sample rate is 2000 and one step represents 0.5 milliseconds in 4X horizontal expanded zoom view in options of the JVA program.

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  Fig. 3 Unilateral joint vibrations without time delay and phase shift. In these cases, ipsi-lateral joint vibrations with smaller values of total integral and bigger values of > 300 / < 300 ratio than contra-lateral joint vibrations were discriminated as transferred joint vibrations. All transferred vibrations showed small values of total integral below 10.

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  Fig. 4 Ipsi-lateral joint vibration with smaller values of total integral and > 300 / < 300 ratio than contra-lateral joint vibration. Both subject and examiner recorded this case as bilateral joint vibrations but JVA detected mirror image in right side waveforms and it was discriminated as left origin joint vibration. Only 1 pair of vibrations showed this features among 42 unilateral joint vibrations.

Reference

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