SI screw vs locking square plate fixation in sacroiliac joint disruption on composite bone models
| dc.contributor.advisor | Van der Merwe, Johan Francois | |
| dc.contributor.advisor | Van Zyl, Allan Aubrey | |
| dc.contributor.author | Kloppers, Frederik Jacobus | |
| dc.date.accessioned | 2022-07-04T09:57:29Z | |
| dc.date.available | 2022-07-04T09:57:29Z | |
| dc.date.issued | 2020-11 | |
| dc.description.abstract | Background: The aim of this study was to compare a locked square plate to a standard sacroiliac screw of the sacroiliac joint on a composite pelvis bone model to assess the ultimate load tolerated before failure of fixation and to describe the mode of failure of the construct. Methods: Bilateral sacroiliac (SI) joint dislocations were created in 10 composite pelvic bone models. In this descriptive comparative study, the one SI joint was fixated using a 7.3mm cannulated screw and the contralateral side fixated using a 4-hole square locking plate. The pubic symphysis was not fixed. An upward vertical load was manually applied to each respective SI joint using a hook into the sciatic notch. The ultimate load to failure and the mode of failure was recorded for both groups. Results: The mean load to failure for the SI screw group was 310 N and for the SI plate group 580 N. The ultimate load to failure was significantly lower in the SI screw group (p=0.0002). There were no hardware-related failures recorded in any of the fixations in the study. The SI screw group had failure through a fracture of the sacrum in all the specimens. In the SI plate group, fractures of the sacrum and ilium constituted, respectively, 60% and 40%. Conclusion: A locked square plate fixation is superior to a single SI screw at the ultimate load to failure when a vertical load is applied to the sacroiliac joint in a composite bone model. | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11660/11739 | |
| dc.language.iso | en | en_ZA |
| dc.publisher | University of the Free State | en_ZA |
| dc.rights.holder | University of the Free State | en_ZA |
| dc.subject | Dissertation (M.Med. (Orthopaedic Surgery))--University of the Free State, 2020 | en_ZA |
| dc.subject | Pelvic ring | en_ZA |
| dc.subject | Pelvis trauma | en_ZA |
| dc.subject | SI joint | en_ZA |
| dc.subject | SI screw | en_ZA |
| dc.subject | Sacroiliac plating | en_ZA |
| dc.subject | Bone models | en_ZA |
| dc.title | SI screw vs locking square plate fixation in sacroiliac joint disruption on composite bone models | en_ZA |
| dc.type | Dissertation | en_ZA |