Knezevic Milica Jeremic, Knezevic Aleksandar, Boban Jasmina, Maletin Aleksandra, Milekic Bojana, Koprivica Daniela Djurovic, Mijatov Ivana, Puskar Tatjana
Faculty of Medicine Novi Sad, University of Novi Sad, 21000 Novi Sad, Serbia.
Medical Rehabilitation Clinic University Clinical Center of Vojvodina, 21000 Novi Sad, Serbia.
J Clin Med. 2023 Jul 31;12(15):5035. doi: 10.3390/jcm12155035.
(1) Background: During the magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ), it is necessary to scan the joints in the closed- and open-jaw position, as well as in the maximally open-jaw position. In order to examine both joints in these positions, an MRI compatible mouth opener is required, which allows the articular surfaces to maintain their position stably. (2) Methods: In this study, we included 200 patients aged 18 to 65, with various levels of clinical severity. The mouth opener is made of polymethyl methacrylate and used for dynamic imaging of TMJ. It is in the form of an arrow, with incisures on upper and lower surfaces 1 mm apart and these match possible variations in jaw opening. All the patients were scanned with mouth opener and, immediately after this scanning, with syringe (20 ccm) as a standard device used for mouth opening in clinical setting. (3) Results: A total of 200 MR examinations of TMJs were performed and the mechanical mouth opener was successfully applied without artifacts in all patients. The mouth opener device proved to be adequate in case of MRI of the TMJ for different ranges of mouth opening with the proper protocol for provoked imaging, because the incisures are located at a distance of 1 mm and no objective artifacts were observed in any examination that degraded the diagnostic quality of the examination. (4) Conclusions: The design of the acrylate mouth opener is precisely defined, and it has a purpose in the MRI diagnosis of TMJ disorders.
(1) 背景：在颞下颌关节（TMJ）的磁共振成像（MRI）过程中，有必要在闭口位、开口位以及最大开口位对关节进行扫描。为了在这些位置检查双侧关节，需要一个与MRI兼容的开口器，它能使关节面稳定地保持其位置。(2) 方法：在本研究中，我们纳入了200名年龄在18至65岁之间、临床严重程度各异的患者。该开口器由聚甲基丙烯酸甲酯制成，用于TMJ的动态成像。它呈箭头形状，上下表面有相距1毫米的切口，这些切口与可能的张口变化相匹配。所有患者均使用开口器进行扫描，并且在此次扫描后立即使用注射器（20立方厘米）作为临床环境中用于张口的标准器械进行扫描。(3) 结果：共对200个TMJ进行了MR检查，机械开口器在所有患者中均成功应用且未产生伪影。对于TMJ的MRI检查，在不同张口范围且采用适当的激发成像方案时，该开口器被证明是合适的，因为切口间距为1毫米，并且在任何检查中均未观察到会降低检查诊断质量的客观伪影。(4) 结论：丙烯酸酯开口器的设计精确界定，在TMJ疾病的MRI诊断中具有作用。
