Chinese Journal of Clinical Anatomy >
Imaging study of three-dimensional reconstruction model to simulate lag screw internal fixation for the sacroiliac joint
Received date: 2014-06-08
Online published: 2015-04-21
Objective To provide anatomic basis for lag screw internal fixation of the sacroiliac joint through the line from the posterior inferior iliac spine to the tubercle of iliac crest. Methods CT scanning data from 60 adults pelvis（30 males and 30 females）were collected clinically and then imported into Mimics15.01 for 3D image reconstruction. Place screws from the intersection of the long axis of sacral articular surface and the pedicle axis of S1, S2, S3.The angle between the screws and coronal plane (α) and horizontal plane (β) were measured. Results (1) Three points that the screws penetrated through the outside of iliac wing fell on the line from the posterior inferior iliac spine to the tubercle of iliac crest. (2)The angle α and β were measured as follows: Male:α1（13.6±3.7）°,α2（4.3±1.8）°,α3（10.0±4.4）°;β1（19.1±5.3）°,β2（9.5±4.1）°, β3（4.0±1.5）°. Female: α1（12.4±3.4）°, α2（4.5±2.1）°, α3（10.7±4.0）°; β1（17.5±4.6）°, β2（10.0±4.1）°, β3（3.7±1.5）°. Conclusions It is safe and convenient for placing lag screws through the entry point in the line from the posterior inferior iliac spine to the iliac tubercle for internal fixation of the sacroiliac joint.
HONG Hai-Qing , YIN Wei-Gang , SHI Ceng-Yuan , LIN Rong , FAN Yong-Cheng , CHEN Yi-Yong . Imaging study of three-dimensional reconstruction model to simulate lag screw internal fixation for the sacroiliac joint[J]. Chinese Journal of Clinical Anatomy, 2015 , 33(2) : 144 -147 . DOI: 10.13418/j.issn.1001-165x.2015
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