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- Title
Unbalanced lateral mandibular deviation associated with TMJ sound as a sign in TMJ disc dysfunction diagnosis.
- Authors
Widmalm, S. E.; Dong, Y.; Li, B. X.; Lin, M.; Fan, L. J.; Deng, S. M.
- Abstract
The aim was to study the characteristics of lateral mandibular horizontal deviations during opening-closing movements and their association with TMJ sounds of the clicking type. Subjects were 28 healthy volunteers and 38 patients diagnosed with MRI imaging as having TMJ disc dysfunction, 22 with disc displacement without (DD) and 16 as having disc displacement with reduction (DDR). TMJ sounds were recorded with miniature microphones placed in the ear canals, and jaw movements were documented with a kinesiograph. A sign, unbalanced lateral deviation (ubd) was defined as a rapid, short duration, change in jaw movement direction from, and back to, a smooth deviation path in the horizontal plane. The hypotheses were that degrees of maximal deviations, proportions of unbalanced deviation ( ubd) and such deviation associated with TMJ sounds ( ubdS), differ between healthy subjects and patients with DD or DDR. Comparisons between groups were made using one-way anova and chi-square analysis, as appropriate. No differences were found between groups regarding degree of lateral deviation per se. The proportions of ubd and ubdS were significantly higher in patients with DDR than in healthy subjects and than in patients with DD ( P < 0·001), but no such differences were found between healthy subjects and patients with DD. For prediction of DDR, the sensitivity and specificity of the sign ubdS were found to be 68·8% and 89·3%, respectively. For the sign ubd, they were 100·0% and 64·3%. This indicates that the sign ubdS has diagnostic value in screening for DDR.
- Subjects
MANDIBULAR joint; TEMPOROMANDIBULAR joint abnormalities; SOUND recordings in medicine; MANDIBLE abnormalities; JAW abnormality diagnosis; TEMPOROMANDIBULAR disorders; MAGNETIC resonance imaging; PATIENTS; EQUIPMENT &; supplies; MANDIBLE; CHI-squared test; STATISTICS; DATA analysis; VISUAL analog scale; DATA analysis software; DESCRIPTIVE statistics; DIAGNOSIS; ANATOMY
- Publication
Journal of Oral Rehabilitation, 2016, Vol 43, Issue 12, p911
- ISSN
0305-182X
- Publication type
Article
- DOI
10.1111/joor.12446