Istituto Nazionale Migranti e Povertà (INMP) UOC di odontoiatria sociale e riabilitazione gnatologica.
J Biol Regul Homeost Agents. 2020 May-Jun;34(3 Suppl. 1):1-8. DENTAL SUPPLEMENT.
The aim of this study is to evaluate with MRI the TMJs behavior during one-side clenching on a hard bolus. The sample consisted of 13 patients. an MRI of TMJ using a 1.5 Tesla superconducting magnet and a dedicated surface coil was performed in all patients. Parasagittal scans of the TMJ (perpendicular to the long axis of the condyles) were made with the mouth closed, open and with a plastic thickness 10 mm high, 15 mm wide and 20 mm long always interposed between the molars of the left side; TSE T2W and DPW sequences were used. The working condyle is always positioned behind the non-working contralateral condyle and the morphology of the retrodiscal tissue upper lamina was curvilinear in all TMJs examined. This work confirmed that, during clenching on a unilateral hard bolus, the working condyle translates less than the balancing one and that the condyle-disc ratios are substantially the same in both sides. The study of the retrodiscal tissue imaging in the different functional phases, suggest that it does not exert any pulling force towards the disc.
本研究旨在通过 MRI 评估单侧紧咬硬团块时 TMJ 的运动情况。该样本包括 13 名患者。所有患者均使用 1.5T 超导磁体和专用表面线圈进行 TMJ MRI 检查。在闭口、开口和左侧磨牙之间始终插入高 10mm、宽 15mm、长 20mm 的塑料的情况下，对 TMJ 进行矢状位扫描（与髁突长轴垂直）；使用 TSE T2W 和 DPW 序列。工作髁突始终位于对侧非工作髁突的后面，所有检查的 TMJ 中，盘后组织上缘的形态均呈曲线状。这项工作证实，在单侧硬团块紧咬时，工作髁突的移动小于平衡髁突，并且两侧的髁突-盘比值基本相同。在不同功能阶段对盘后组织成像的研究表明，它不会对盘施加任何拉力。
