![]() ![]() ![]() The purpose of this study was to design a simple, graded bite block for dynamic MRI examinations of the temporomandibular joints. However, those studies demonstrate certain limitations, such as different numbers of opening steps, a lack of repeatability and the presence of motion artefacts. 6 Some authors have even proposed the use of dynamic magnetic resonance imaging without any intraoral device. 5 Hegab et al 6 used an intraoral occlusal splint to assess disks at the constrained position in comparison with the closed-mouth position. 2 However, to perform a dynamic assessment, incremental jaw openers are necessary, such as the commercially available bite Medrad Burnett TMJ-200 Bi-Directional Device (GE Healthcare, USA), 3,4 or the hydraulic device proposed by Vogl et al. Some authors have proposed using simple devices such as dental wedges made of plastic or wood, plastic syringes or bottle corks as bite blocks for the open-mouth position, and chocolate candies for physical load imaging assessments. Several methods of performing dynamic assessments have been proposed in textbooks. Displacement and deformation can lead to clinical symptoms such as audible clicking, a limited range of mouth opening, and even non-dental pain in the orofacial region. Dynamic assessments allow us to assess the movement of the disc and its eventual displacement or deformation. Dynamic assessments of the temporomandibular joints are important in clinical practice. ![]() This modality reveals the anatomical situation of the soft tissues (especially the position of the intra-articular disc) and bone. Magnetic resonance imaging is currently the best imaging modality for assessing the position and mobility of the moving parts of the temporomandibular joints. ![]()
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