Yajima Aya, Sano Tsukasa, Otonari-Yamamoto Mika, Otonari Takamichi, Ohkubo Mai, Harada Takuya, Wakoh Mamoru
Dept. of Oral and Maxillofacial Radiology, Tokyo Dental College 1-2-2 Masago, Mihama-ku Chiba 261-8502, Japan.
Cranio. 2007 Oct;25(4):250-6. doi: 10.1179/crn.2007.038.
The purpose of this study was to clarify the presence of pain and a correlation between pain and characteristics of signal intensity of mandibular bone marrow in temporomandibular joints (TMJ) with osteoarthritis (OA). A total of 196 joints in 98 patients with TMJ disorders were examined using magnetic resonance imaging (MRI). A pain score and signal intensity on mandibular bone marrow were analyzed in the TMJ with OA. TMJ with OA showed a higher degree of pain compared to those without (p < 0.05). During opening, the joints in the higher signal intensity group showed a significantly higher degree of pain compared to the joints in the lower signal intensity group in those with OA on proton density weighted images (p < 0.05). It was concluded that TMJ with osteoarthritis is related to pain and that a symptomatic osteoarthritic TMJ can accompany bone marrow changes in the condyle, showing an increased signal on proton density weighted images.
本研究的目的是阐明颞下颌关节（TMJ）骨关节炎（OA）患者下颌骨髓疼痛的存在情况以及疼痛与信号强度特征之间的相关性。使用磁共振成像（MRI）对98例颞下颌关节紊乱患者的196个关节进行了检查。分析了OA患者颞下颌关节的疼痛评分和下颌骨髓的信号强度。与无OA的颞下颌关节相比，OA患者的颞下颌关节疼痛程度更高（p < 0.05）。在开口过程中，质子密度加权图像上OA患者中，高信号强度组的关节疼痛程度明显高于低信号强度组的关节（p < 0.05）。得出的结论是，骨关节炎的颞下颌关节与疼痛有关，有症状的骨关节炎颞下颌关节可伴有髁突骨髓变化，在质子密度加权图像上显示信号增强。
