Maeda M, Itou S, Ishii Y, Yamamoto K, Kawamura Y, Matsuda T, Hayashi N, Ishii Y
Department of Radiology, Fukui Medical School, Japan.
Acta Radiol. 1992 Sep;33(5):410-3.
Ten temporomandibular joints (TMJs) of 5 healthy volunteers and 19 TMJs of internal derangements in 16 patients with splint therapy were examined with MR imaging. T1-weighted images were obtained only in the closed mouth position, and gradient recalled acquisition in steady state (GRASS) images were obtained in active opening and closing phases, allowing a pseudodynamic display of TMJ movement. All patients received protrusive splint treatment. The usefulness of MR imaging to assess the efficacy of splint therapy was evaluated. Corrected disk position with the splint in place was clearly demonstrated in 9 TMJs, corresponding with elimination of reciprocal clicking. Ten other TMJs of anterior disk displacement without reduction showed uncorrected disk position by the splint. This information could confirm the therapeutic efficacy, or suggest other treatment alternatives. GRASS MR imaging can provide accurate and physiologic information about disk function in initial and follow-up assessment of protrusive splint therapy.
对5名健康志愿者的10个颞下颌关节（TMJ）以及16名接受夹板治疗的关节内紊乱患者的19个TMJ进行了磁共振成像（MR）检查。仅在闭口位获取T1加权图像，在主动开口和闭口阶段获取稳态梯度回波（GRASS）图像，从而实现TMJ运动的伪动态显示。所有患者均接受前伸夹板治疗。评估了MR成像在评估夹板治疗效果方面的实用性。9个TMJ在佩戴夹板时显示盘位置得到纠正，这与往复性弹响的消除相对应。另外10个不可复性盘前移位的TMJ在佩戴夹板后盘位置未得到纠正。这些信息可以证实治疗效果，或提示其他治疗选择。GRASS MR成像可以在对前伸夹板治疗的初始和随访评估中提供有关盘功能的准确和生理信息。
