髁突形态与髁突矢状骨折发生率之间的关系分析

Analysis of correlation between the shape of mandibular condylar head and occurrence of sagittal fracture of the condyle

目的:分析髁突形态与单侧髁突矢状骨折(sagittal fracture of mandibular condyle, SFMC)发生率之间的关系。方法:回顾2010年12月—2021年12月河北医科大学第三医院收治的155例单侧髁突矢状骨折患者的病例资料,将其螺旋CT数据以DICOM格式导入RadiAnt DICOM Viewer软件。根据Yale的髁突形态的分类标准,将髁突形态分为平、凸、角、圆4种。根据Hlawitschka的髁突矢状骨折分类标准,将髁突矢状骨折分为A、B、M 3类,分析髁突形态与单侧髁突矢状骨折发生率之间的关系。采用SPSS 26.0软件包对数据进行统计学分析。结果:155例患者中,健侧髁突形态占比分别是平形41.9%、凸形37.4%、圆形11.6%、角形9.0%,髁突矢状骨折的分类占比分别是A型20.6%、B型42.6%、M型36.8%。不同髁突形态的髁突矢状骨折发生率不同,两者之间存在相关性(P=0.015)。平形髁突相比其他3种类型的髁突更容易发生矢状骨折,角形髁突最不容易发生矢状骨折。结论:髁突形态不同会影响髁突矢状骨折发生率,平形髁突更容易发生髁突矢状骨折,而角形髁突最不易发生矢状骨折。

PURPOSE:To analyze the correlation between the shape of the condyle and the occurrence of unilateral sagittal fracture of the mandibular condyle(SFMC).METHODS:A total of 155 patients with unilateral SFMC treated in the Third Hospital of Hebei Medical University from December 2010 to December 2021 were selected.The spiral CT data of the patients were anlysed using RadiAnt DICOM Viewer software in DICOM format.According to the Yale’s classification criteria,the condylar head shape was categorized into 4 types as flat,convex,angle and round.According to Hlawitschka’s classification,the sagittal condyle fractures was divided into 3 types as A,B and M.The relationship between condylar morphology and the incidence of unilateral sagittal condylar fractures was analyzed.SPSS 26.0 software package was used for statistical analysis.RESULTS:Among the 155 patients,the proportion of condyle shape on the contralateral side was flat(41.9%),convex(37.4%),round(11.6%) and angle(9.0%).The proportion of condyle sagittal fracture classification was type A(20.6%),type B(42.6%) and type M(36.8%).There was correlation between condylar morphology and the incidence of sagittal condylar fracture(P =0.015).The flat-shaped condyle was more prone to SFMC than the other three types of condyle.Angular condyle was less prone to SFMC than the other three types of condyle.CONCLUSIONS:The different condyle shape will affect the occurrence of sagittal condyle fracture,flat condyle was more prone to sagittal fracture,while the angular condyle was less prone to sagittal fractures.