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Establish imaging diagnostic criteria of masticatory muscle tendon-aponeurosis hyperplasia

建立咀嚼肌腱腱膜增生的影像学诊断标准

基本信息

批准号：
21592548
负责人：
KAKUDO Kenji
金额：
$ 3.08万
依托单位：
Osaka Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

To establish imaging diagnostic criteria of masticatory muscle tendon-aponeurosis hyperplasia(HyTAM): 1) the tendon and aponeurosis of the masseter were analyzed involving normal subjects(control group) and HyTAM patients(HyTAM group) employing CT, and then 2) muscle activity levels during mandibular movement, occlusion, and maximum voluntary clenching were analyzed. 1) The human tendon and aponeurosis in the masseter were classified into the following 4 types based on the findings of CT image analysis : Type I, a single thin tendon was present at the anterior margin of the masseter ; type II, a single, tendon continuous from the zygomatic process to the mandibular masseter ridge was present at the anterior margin of the masseter ; type III, multiple tendons continuous from the zygomatic process to the mandibular masseter ridge were present in the masseter ; and type IV, others. Types I, II, III, and IV were noted on 163, 14, 19, and 4 sides of the masseter in the control group, respectively, and 0, 1, 31, and 2 sides in the HyTAM group, respectively. 2) Regarding mandibular movement, the maximum mouth opening was significantly smaller in the HyTAM than in the control group, but no significant differences were noted in the amount of anterior or lateral movement. The occlusal force of maximum clenching was significantly greater in the HyTAM than in the control group. The muscle activity levels of the temporal and masseter muscles while maximum clenching were significantly greater in the HyTAM than in the control group, but no significant difference was noted in the temporal-to-masseter muscle activity level ratio. It was suggested that the analyzing of the tendon and aponeurosis of the masseter and masticatory muscle activity levels during mandibular movement, occlusion, and maximum voluntary clenching were useful.

建立咀嚼肌肌腱-腱膜增生症（HyTAM）的影像学诊断标准：1）对正常人（对照组）和HyTAM患者（HyTAM组）的咬肌肌腱和腱膜进行CT分析; 2）分析下颌运动、咬合和最大随意握紧时的肌肉活动水平。1)根据CT图像分析结果，将咬肌肌腱和腱膜分为4型：Ⅰ型，咬肌前缘有一条较细的肌腱，Ⅱ型，咬肌前缘有一条从颧骨突到下颌骨咬肌嵴的肌腱，Ⅲ型，咬肌前缘有一条从颧骨突到下颌骨咬肌嵴的肌腱，Ⅲ型，咬肌前缘有一条从下颌骨咬肌嵴到下颌骨咬肌嵴的肌腱。第三型为咬肌内有多条肌腱从颧骨突连续至下颌咬肌嵴，第四型为其他。对照组咬肌I型163侧，II型14侧，III型19侧，IV型4侧，HyTAM组分别为0侧，1侧，31侧，2侧。2)关于下颌运动，HyTAM组的最大张口度显著小于对照组，但在前向或侧向运动量方面没有显著差异。HyTAM组的最大咬合力显著大于对照组。颞肌和咬肌的肌肉活动水平，而最大的紧握显着大于在HyTAM比对照组，但没有显着差异，颞肌咬肌活动水平比。提示分析下颌运动、咬合和最大自主咬合过程中咬肌肌腱和腱膜以及咀嚼肌活动水平是有用的。