Am J Arthritis | Volume 3, Issue 1 | Case Report | Open Access

Minimally-Invasive Treatment for Anterior Pelvic Ring Disruption with Pedicle Screw–Rod Fixation (Infix Technique): An Initial Case Series

Shaoguang Li*, Jianzheng Zhang, Zhi Liu and Tiansheng Sun

Department of Orthopedic, Chinese Army General Hospital PLA, China

*Correspondance to: Shaoguang Li 

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Objective: To evaluate the clinical application of the minimally-invasive pedicle screw–rod fixator (INFIX) for anterior pelvic ring disruption: feasibility, applicability, and limitations.
Design: Retrospective cohort study. Setting: Chinese Army General Hospital PLA, a tertiary care hospital in Beijing, China. Patients/
Participants: 28 patients with pelvic injuries between May 2012 and August 2016. Intervention Underwent definitive anterior fixation using the minimally-invasive INFIX technique with or without posterior fixation. Main outcome measurements: Injuries were classified using the Young and Burgess, and Tile classification systems. Reductions of the pelvic ring were assessed using the Matta criteria. Patients were contacted to obtain functional outcomes using the Majeed scoring system, Complications were tabulated.
Results: The range of follow-up was 12-38 months post-surgery. The quality of fracture reduction was excellent in 15 patients, good in nine, and fair in four. The mean Majeed functional pelvic score was 80.65 ± 14.2 (median 84, range 51 to 100). Six had injury to the Lateral Femoral Cutaneous Nerve (LFCN), and two suffered painful implant impingement. Asymptomatic heterotopic ossification occurred in eight patients. There were no patients with deep vein thrombosis, intraabdominal violations or infection
Conclusion: INFIX is a reliable, simple, safe, and mini-invasive approach for stabilizing unstable anterior pelvic injuries.


Pelvis fracture; Internal fixation; Minimal invasive surgery; INFIX


Li S, Zhang J, Liu Z, Sun T. MinimallyInvasive Treatment for Anterior Pelvic Ring Disruption with Pedicle Screw– Rod Fixation (Infix Technique): An Initial Case Series. Am J Arthritis. 2019;3(1):1014.

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