安氏Ⅲ类错【牙合】畸形患者翼外肌MRI研究  

Magnetic resonance imaging assessment of the lateral pterygoid muscle in Class III malocclusion subjects

作　　者：刘月华[1] 杨晓江[1] 高晓辉[2] 李渡[1] 

机构地区：[1]首都医科大学口腔医学院口腔颌面外科,100006 [2]首都医科大学口腔医学院正畸科,100006

出　　处：《中华口腔医学杂志》2012年第1期6-9,共4页Chinese Journal of Stomatology

摘　　要：目的通过MRI观察安氏Ⅲ类错【牙合】畸形患者翼外肌结构，探讨Ⅲ类错【牙合】畸形导致颞下颌关节紊乱病的潜在危险性。方法利用MRI对24例安氏Ⅲ类错【牙合】畸形患者（Ⅲ类错【牙合】组）和10名健康对照者（健康对照组）进行翼外肌成像研究。观察两组翼外肌病理结构及Ⅲ类错【牙合】组病理结构与颞下颌关节紊乱病体征的关系。结果Ⅲ类错【牙合】组翼外肌存在肌肉肥大、挛缩和萎缩等病理改变（36侧），并与健康对照组翼外肌病理改变（2侧）的差异有统计学意义（P〈0．01）。安氏Ⅲ类错【牙合】畸形患者有翼外肌的病理改变，但多不伴颞下颌关节紊乱病的临床症状。结论安氏Ⅲ类错【牙合】畸形比正常【牙合】可更多地引起翼外肌的病理改变，有发生颞下颌关节紊乱病的潜在危险。Objective To analyze the relationship between Class III malocclusion and pathological changes in temporomandibular joint （TMJ） structures using magnetic resenonce imaging （MRI）. Methods Twenty-four Class III malocclusion adult patients and 10 normal control cases were included in the study. The characteristics of lateral pertygoid muscle （ LPM ） in the sample group and the control group were assessed. Results More pathological changes of LPM were found in Class III malocclusion adult patients （36 TMJ）. The changes included hypertrophy, atrophy and contracture. And there was no relation between the pathological changes of LPM and the symptom of temporomandibular disorders （ TMD ）. Conclusions The frequency of pathological changes of LPM was greater in patients with Class III malocclusion than in the control group.

关 键 词：错【牙合】 安氏Ⅲ类 磁共振成像 咀嚼肌 

分 类 号：R783.5[医药卫生—口腔医学]