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A STUDY OF THE SACROILIAC JOINT PARAMETERS ON ABDOMINAL COMPUTED TOMOGRAPHY AND ITS APPLICATION IN SACROILIAC FRACTURE – DISLOCATION TREATMENT
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Abstract
Background: Computed tomography is considered the gold standard in diagnosis and treatment plan of sacroiliac joint (SIJ) dislocation-fractures. However, determining the position, orientation, and length of bone fixation devices of these injuries always cause difficulties for the surgeon. Objectives: Measuring the parameters of SIJ on the abdominal computed tomography images. Materials and methods: The study was conducted on 313 abdominal computed tomography images of the patients who pelvis have no lesions or abnormalities in the pelvis, we measured the parameters of SIJ. Results: Thickness of the ala sacrum in men: 37.4 ± 4.5 mm, female: 34.3 ± 3.6 m. The anteroposterior thickness of the iliac part adjacent to the SIJ in men: 63.6 ± 4.3 mm, in women: 59.7 ± 5 mm. The angle of screw at the front part of the iliac wing closed to the SIJ in men: 26.7o ± 4.2, women: 25.1o ± 4.5. The length of the posterior compression plate in men: 150.8 ± 8.5 mm, female: 152.2 ± 7.9 mm. The length of one-sided SIJ screw in male: 69.7 ± 4.3mm, female: 68.4 ± 4.1mm. The angle of screw in men: 79.6 ± 5.7, women: 77.2 ± 5.9, the length of the SIJ screw on both sides: 168.9 ± 10.5 mm, female: 165.4 ± 10.6 mm. Conclusion: The SIJ parameters can be clinically applied: the length of ala sacral screws was 37 – 38 mm for men and 34 - 35mm for women. The length of screws at the iliac part adjacent to the SIJ and screw angle were respectively: men 63 – 64 mm and 730 - 740 compared to the horizontal plane of the iliac wing adjacent the SIJ; women 59 – 61 mm and 750 anteroposterior. The length of compression plates was 12 - 14 holes. The length of screws for fixing the SIJ was 65 - 70 mm and the screw angle was about 800 compared to the outer plane of the iliac joint adjacent to the SIJ.
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Keywords
Sacroiliac joint, dislocation – fracture sacroiliac joint, SIJ screw, computed tomography
References
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