This study was performed to investigate the relationship between clinical manifestations related to temporomandibular joint sounds and temporomandibular joint vibrations that occurred synchronously with sounds. There have been reported in many
articles
that joint sounds indicate internal joint pathology. Therefore, it is necessary to evaluate type and patterns of joint sounds, and radiographic changes of temporomandibular joint(TMJ) in order to diagnose and deal with the Temporomandibular
Disorders(TMDs).
For this study 142 patients with TMDs were collected and they were examined by routine diagnostic procedure for TMDs. The author classified TMJ sounds clinically into 3 types : click, popping, and crepitus. Transcranial and panoramic radiographs
were
taken for observing bony changes of TMJ, and for observing vibrations of TMJ Sonpak of Biopak(r) system(Bioresearch Inc., WI, USA) was used.
@ES The obtained results were as follows :
@EN 1. Female subjects with crepitus were older than those with click or popping and their mean ages were about 45 years old. But in male subjects, there was no age difference.
2. For all subjects, mean value of maximal mouth opening were above 40mm, which are lower limit of normal vertical opening. But in subjects with L-type opening deviation, mouth opening capacity were about 36mm of range.
3. Symptom duration state when patient presented first were slightly longer in subjects with crepitus but there were no statistical differences. And there were also no radiographic difference among 3 types of joint sounds in regard to symptom
duration.
4. In subjects with click, it might have been interpreted that 12% had closed lock, 12% had degenerative joint disease, and about 17% of the subjects had normal joints by Sonopak.
5. There were no significant relationship between subjective loudness of joint sounds and magnitude of joint vibrations.
6. The highest value of Integral and peak amplitude were observed in popping sounds and though it was not significant, value of peak frequency was highest in crepitus.
7. Amount of mandibular positional change were differed between click and crepitus on frontal plane, between click, crepitus and popping on horizontal plane in rotational movements, respectively. However, there were no difference among them in
translational movements.
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