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KMID : 1024020170470040219
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Imaging Science in Dentistry
2017 Volume.47 No. 4 p.219 ~ p.226
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Internal derangement as a predictor of provoked pain on mouth opening: A magnetic resonance imaging study
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Koh Kwang-Joon
Park Ha-Na
Kim Kyoung-A
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Abstract
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Purpose: This study investigated the relationship between pain and internal derangement in temporomandibular disorder (TMD) patients using magnetic resonance imaging (MRI).
Materials and Methods: This study analyzed 356 TMD patients (712 temporomandibular joints [TMJs]). The inclusion criteria were the presence of spontaneous or provoked pain on one or both TMJs and having undergone MRI. The patients with provoked pain were divided into 3 groups: pain on palpation, pain on mouth opening, and pain on mastication. MRI was performed using a 1.5-T scanner. T1- and T2-weighted parasagittal and paracoronal images were obtained. According to the findings on the T1-weighted images, another 3 groups were created based on internal derangement: normal, disc displacement with reduction, and disc displacement without reduction. The MRI findings were independently interpreted by 2 experienced oral and maxillofacial radiologists at 2 different times. Statistical analysis was performed by the chi-square test using SPSS (version 12.0; SPSS Inc., Chicago, IL, USA).
Results: Provoked pain on mouth opening was found to be correlated with internal derangement in TMD patients (P<.05). However, spontaneous pain and provoked pain on palpation or mastication were not associated with internal derangement (P>.05).
Conclusion: These results suggest that internal derangement was a significant predictor of provoked pain on mouth opening.
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KEYWORD
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Magnetic Resonance Imaging, Temporomandibular Joint, Pain
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