MRI Manifestation of Temporomandibular Joint after Trauma
- VernacularTitle:颞下颌关节损伤的MRI表现
- Author:
Hua WANG
;
Xiaoying WANG
;
Yi ZHANG
;
Dongmei HE
;
Xuexiang JIANG
- Publication Type:Journal Article
- Keywords:
temporomandibular joint;
trauma;
MR imaging
- From:
Journal of Practical Radiology
1991;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate MRI manifestations of temporomandibular joint trauma,emphasized on the displacement and deformation of the meniscus.Methods Thirteen patients with TMJ trauma were examined by MRI with 3-inch dual surface coils.T1WI and T2WI images in oblique sagittal and coronal plane were acquired in both closed-and open-mouth positions.Results Twenty(20/26,76.9%) joints had condylar fractures.Nineteen(19/20,95%) discs in 12 patients displaced anteromedially with the condylar fragments,six(6/20,30%) discs showed distortion and deformation.The other one patient had unilateral condylar fracture companied with avulsion and lateral dislocation of ipsilateral disc(1/20,5%),and the opposite disc also showed slight anterior displacement.Effusion was observed in 12(12/20,60%) joints with condylar fractures.The location of the discs didn't show obvious change between closed-and open-mouth positions.Conclusion MRI is an effective method for demonstrating TMJ injuries,and is useful for detecting the changes of morphology and position of the discs.
