下颌智齿冠周炎致张口受限的原因探讨  

A ETIOLOGICAL STUDY OF GAPE-LIMIT CAUSED BY PERICORONITIS OF MANDIBULAR

作　　者：杨佑成[1] 殷树勋[1] 李海洋[1] 刘树文[2] 张学俊[3] 耿温琦[4] 

机构地区：[1]滨州医学院附属医院口腔科 [2]滨州医学院肌电图室 [3]滨州医学院解剖学教研室 [4]北京医科大学口腔医学院口腔外科

出　　处：《滨州医学院学报》1991年第1期33-37,96,共5页Journal of Binzhou Medical University

摘　　要：作者解剖尸体咀嚼肌78块,临床手术下观测颞肌肌腱下颌支前附丽32人(男18人,女14人),咀嚼肌肌电图检测35人,共检测178块肌肉。认为下颌急性智齿冠周炎的感染扩散,首先侵犯的磨牙后区颞肌肌腱及翼内肌前部,引起肌肉的反射性痉挛,成为张口受限的主要原因;而与下颌支外侧的嚼肌常无关系。用2％普鲁卡因封闭颞肌下颌支前附丽或翼内肌前均可使张口度增大,而封闭嚼肌则开口度无明显变化。In this study 78 maspicapory muscles were measured by autopsy. Myoelectrograph was assessed in 35 cases(178 muscles). Anterior attachments of temporal muscle tendon of mandibula were observed in 32 cases(male 18, female 14) during operation. The results showed that posterior temporal muscle tendon of molar and medial pterygoid muscle might be involved first when acute pericoronitis of mandibular third molar occured. This caused muscle cramping reflexly and gape-limit. No relationship between gape-limit and masseter muscle located in lateral mandibular ramus was revealed in this study. Closing up with 2％ procaine made the temporal muscle and medial pterygoid muscle relaxed and the gape degree enlarged, but closing up the masscter muscle did not change the gape degree apparently.

关 键 词：冠周炎 智齿 下颌 张口受限 

分 类 号：R782.31[医药卫生—口腔医学]