Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint ...Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint of abnormal occlusion. Regarding the present status, there was no occlusion on the right side. No temporomandibular joint pain, myalgia, or clicking were observed while mouth opening. On MR images, the posterior disc displacement without reduction on the right was observed and it was assumed that occlusal abnormality was due to this condition. We treated him with the following methods. After injection into the superior articular cavity with 2% lidocaine, a sodium hyaluronate preparation was injected followed by intermaxillary traction applied using rubber. The recovery of occlusion was confirmed in follow-up at 5 days after treatment. In the 13th days, the intermaxillary traction was removed. On MR images, the right disc condition was changed to anterior disc displacement with reduction. We consider our treatment methods are effective for this clinical condition.展开更多
目的:探讨MRI张闭口位动态成像在颞颌关节盘前移与颞颌关节紊乱综合征(TMJDS)相互关系及临床意义。方法:20例单侧TMJID患者(20个颞颌关节)(病例组)与10例健康对照组双侧颞颌关节(20个颞颌关节),使用SIMENS 3.0 T MR扫描仪头颅线圈进行...目的:探讨MRI张闭口位动态成像在颞颌关节盘前移与颞颌关节紊乱综合征(TMJDS)相互关系及临床意义。方法:20例单侧TMJID患者(20个颞颌关节)(病例组)与10例健康对照组双侧颞颌关节(20个颞颌关节),使用SIMENS 3.0 T MR扫描仪头颅线圈进行颞下颌关节进行斜矢状闭口位、开口位自旋回波T1WI、T2WI扫描,测量闭口位关节盘前移角度,两者间对比并与开口大小进行相关性分析。结果:病例组闭口位关节盘前移角度与最大开口大小存在正相关(r=0.680,P<0.05)。对照组闭口位关节盘角度与最大开口大小无明显相关性(r=0.306,P>0.05)。对照组中5例表现为轻度盘前移位。两组间闭口位关节盘前移角度存在明显差异性(P<0.05)。结论:通过MR动态成像可清晰显示颞颌关节盘前移并可测定关节盘前移的角度,关节盘移位与颞颌关节紊乱综合征发生发展密切相关,为临床诊治TMJDS提供指导性信息。展开更多
目的分析正常青年人颞下颌关节盘附着结构的MRI影像表现。方法对25例正常青年人(50个颞下颌关节)行MRI张、闭口斜矢状位质子密度加权像(proton density weighted image,PDWI)扫描,观察颞下颌关节盘附着结构显示率及张、闭口位显示特点...目的分析正常青年人颞下颌关节盘附着结构的MRI影像表现。方法对25例正常青年人(50个颞下颌关节)行MRI张、闭口斜矢状位质子密度加权像(proton density weighted image,PDWI)扫描,观察颞下颌关节盘附着结构显示率及张、闭口位显示特点。结果颞前附着张、闭口位显示率分别为80%(40/50)、90%(45/50),下颌前附着张、闭口位显示率分别为18%(9/50)、20%(10/50),颞后及下颌后附着张口位显示较好,显示率分别为100%(50/50)、82%(41/50),闭口位不能清晰显示;多数附着结构表现为均匀的线样低信号影。结论 MRI PDWI序列能较好地显示正常颞下颌关节盘附着结构。展开更多
文摘Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint of abnormal occlusion. Regarding the present status, there was no occlusion on the right side. No temporomandibular joint pain, myalgia, or clicking were observed while mouth opening. On MR images, the posterior disc displacement without reduction on the right was observed and it was assumed that occlusal abnormality was due to this condition. We treated him with the following methods. After injection into the superior articular cavity with 2% lidocaine, a sodium hyaluronate preparation was injected followed by intermaxillary traction applied using rubber. The recovery of occlusion was confirmed in follow-up at 5 days after treatment. In the 13th days, the intermaxillary traction was removed. On MR images, the right disc condition was changed to anterior disc displacement with reduction. We consider our treatment methods are effective for this clinical condition.
文摘目的:探讨MRI张闭口位动态成像在颞颌关节盘前移与颞颌关节紊乱综合征(TMJDS)相互关系及临床意义。方法:20例单侧TMJID患者(20个颞颌关节)(病例组)与10例健康对照组双侧颞颌关节(20个颞颌关节),使用SIMENS 3.0 T MR扫描仪头颅线圈进行颞下颌关节进行斜矢状闭口位、开口位自旋回波T1WI、T2WI扫描,测量闭口位关节盘前移角度,两者间对比并与开口大小进行相关性分析。结果:病例组闭口位关节盘前移角度与最大开口大小存在正相关(r=0.680,P<0.05)。对照组闭口位关节盘角度与最大开口大小无明显相关性(r=0.306,P>0.05)。对照组中5例表现为轻度盘前移位。两组间闭口位关节盘前移角度存在明显差异性(P<0.05)。结论:通过MR动态成像可清晰显示颞颌关节盘前移并可测定关节盘前移的角度,关节盘移位与颞颌关节紊乱综合征发生发展密切相关,为临床诊治TMJDS提供指导性信息。
