High-resolution CT of the temporomandibular joint in patients with developmental malformation of the external middle ear
10.3969/j.issn.1002-1671.2024.06.006
- VernacularTitle:外中耳发育畸形患者的颞下颌关节高分辨率CT观察
- Author:
Li LI
1
,
2
;
Tanhui CHEN
;
Zheming FANG
Author Information
1. 福建医科大学附属第一医院影像科,福建 福州 350005
2. 东营市人民医院医学影像科,山东 东营 257091
- Keywords:
high-resolution computed tomography;
external middle ear malformation;
temporomandibular joint;
development
- From:
Journal of Practical Radiology
2024;40(6):884-887
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the development of the temporomandibular joint in patients with developmental malformations of the external middle ear.Methods Retrospective analysis of high-resolution computed tomography(HRCT)images of 183 patients with external middle ear malformation,a total of 248 affected ears were examined,and 53 patients with 67 temporomandibular joint abnormalities(abnormal group)were detected visually,accounting for approximately 27％.Further quantification and measurement of the internal and external diameters and anterior and posterior diameters of the mandibular condyle,the depth of the temporomandibular joint fossa,and the angle of the transverse axis of the condyles bilaterally,and the corresponding data of 30 healthy controls(control group)were also measured,and the differences between the two groups were statistically analyzed.Results The internal and external diameters of the condyle was(12.22±3.30)mm in the abnormal group,compared with(17.67±2.90)mm in the control group(t=-9.814,P＜0.001);the anterior and posterior diameters of the condyle was(7.58±1.82)mm in the abnormal group,compared with(8.62±1.09)mm in the control group(t=-3.850,P＜0.001);the joint fossa depth was(4.16±2.83)mm in the abnormal group,compared with(6.12±1.65)mm in the control group(t=-4.700,P＜0.001);the angle of the transverse axis of the condyles bilaterally was(122.17±21.12)° in the abnormal group,compared with(136.49±11.04)° in the control group(t=-3.437,P＜0.001),all differences were statistically significant(P＜0.05).Conclusion Visually visible temporomandibular joint abnormalities are present in 27％of patients with external middle ear malformation,as evidenced by shortening internal and external diameters and anterior and posterior diameters of the condyle,shallowing joint fossa,and reducing angle of the transverse axis extension line of the condyles bilaterally.
