Application of pedicle axis view in percutaneous screw placement for type III fracture dislocation of the sacroiliac joint

Aim: To investigate the clinical application of pedicle axis view in percutaneous screw placement for type III fracture dislocation of the sacroiliac joint. Methods Percutaneous sacroiliac screw fixation was performed in 29 patients with type III fractures of the sacroiliac joint under imaging monitoring by pedicle axis view of the X-ray fluoroscopy (C-arm) after preoperative traction reduction and preoperative preparation. There were 19 males and 10 females, aged from 20 to 75 years old, with a mean age of 42.1 ± 3.4 years. Results The operation time was between 44 and 135 minutes, with a mean of 95.5 ± 9.4 minutes; the intraoperative fluoroscopy time was between 15 and 42 seconds, with a mean of 25 ± 4.7 seconds; the intraoperative blood loss was 5–10 ml, with a mean of 7.1 ± 1.3 ml; according to the Matta scoring system, there were 41 cases with excellent outcomes and 4 cases with good outcomes; based on the definition by Neo et al., pedicle screw positions were categorised into 4 grades: grade 0, 41 screws, grade I, 2 screws, grade II, 2 screws, grade III, 0 screws, and grade 0 and I screws were excellent screws, with an excellent rate of 95.6%; Majeed functional score showed excellent in 37 cases and good in 8 cases, with an excellent and good rate of 100%; 29 cases were followed up between 3 and18 months, with a mean of 7.1 ± 1.2 months. All patients achieved anatomical reduction, with accurate screw placement, no bone penetration, no neurovascular injury, and the fractures of patients healed. Conclusion Pedicle axis view using fluoroscopy is a convenient and quick fluoroscopy method in percutaneous screw placement for type III fracture dislocation of the sacroiliac joint, with a high success rate, good safety and short fluoroscopy time.