Abstract
Objectives
This study aims to assess the disk morphology and the condyle position in subjects with temporomandibular (TMJ) disk displacements on sagittal and coronal magnetic resonance imaging (MRI).
Materials and methods
Seventy-four TMJs (from 37 patients) with positive clinical TMD symptoms according to the RDC/TMD axis I protocol were evaluated by 1.5 T MRI. Disk position, disk morphology, sagittal and coronal condyle position, joint effusion, joint space, and coronal condyle angulation were evaluated. Multivariate logistic regression was used to explore the relationship between disk displacement and MRI variables.
Results
Disk displacement with reduction (DDR) was found in 36.48 % and without reduction (DDwR), in 21.62 % of the joints. Disk displacement was anterior in 35.1 %, anterior-medial in 13.5 %, and anterior-lateral in 9.45 % of cases. The thickened posterior band (94.48 OR, p = 0.001) and the posterior condyle position (4.57 OR, p = 0.03) were more likely found on sagittal MRI in disk displacements. On coronal slices, the disk displacement was significantly associated with the distance from the most medial condyle point to the midplane (p < 0.05).
Conclusions
Disk displacement is associated with changes of disk shape, disk dimension, and condyle position on sagittal MRI. A significant variation of the distance from the most medial condyle point to the midplane in disk displacement was found on coronal MRI.
Clinical relevance
Our study highlights the existence of changes on coronal MRI in TMD patients which should be assessed for better understanding of the clinical evolution of temporomandibular disorders.
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Acknowledgments
This study is supported by funding from a POSDRU/107/1.5/S/78702 project from the University of Medicine and Pharmacy “Iuliu Haţieganu” Cluj-Napoca, Romania.
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The authors declare that they have no conflicts of interests.
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Almăşan, O.C., Hedeşiu, M., Băciuţ, G. et al. Disk and joint morphology variations on coronal and sagittal MRI in temporomandibular joint disorders. Clin Oral Invest 17, 1243–1250 (2013). https://doi.org/10.1007/s00784-012-0803-4
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DOI: https://doi.org/10.1007/s00784-012-0803-4