创伤性颞下颌关节强直临床分析

目的 分析引发创伤性颞下颌关节(temporomandibular joint,TMJ)强直的高风险髁突骨折类型,初步探讨TMJ强直发生的可能性机制.方法 对18例创伤性TMJ强直进行临床、影像学检查及评估.取纤维性强直外侧变性的关节囊、关节间的致密纤维组织及骨性强直关节外侧骨块和内侧骨块,HE染色,光镜观察.结果 ...

A clinical study of post-traumatic temporomandibular joint ankylosis

Objective To investigate the high risk types of condylar fracture developing to temporomandibular joint(TMJ) ankylosis. Methods The clinical and radiographic data of 18 cases of post-traumatic TMJ ankyloses were evaluated.The biopsy was taken from lateral capsules and fibrous tissues in joint spaces of 5 fibrous ankyloses,and lateral and medial bones of 8 bony ankyloses.Histological sections of 5μm thickness were made and stained with hematoxylin-eosin(HE) for light microscope observation. Results Of the 18 cases(24 TMJs) of joint ankylosis,16 TMJs were 5th type condylar fracture,6 were 6th type fracture,2 were 3rd type fracture.The lateral capsulae and fibrous tissues in joint spaces of fibrous ankyloses showed different degreed of chondrification and diffused ossification.The lateral osseous fusions showed the mixed construction consisting of fibre,cartilage and bone.The medial bones were the remainders of fractured condyles. Conclusion The high-risk types of condylar fracture developing to TMJ ankylosis were high level transversal condylar fracture and sagittal fracture with fragment dislocation.