Vertical shear pelvic ring injuries: do transsacral screws prevent fixation failure?

Autor:	Tisano BK; Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, Texas., Kelly DP; Department of Orthopaedic Surgery and Rehabilitation, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma., Starr AJ; Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, Texas., Sathy AK; Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, Texas.
Jazyk:	angličtina
Zdroj:	OTA international : the open access journal of orthopaedic trauma [OTA Int] 2020 Jul 10; Vol. 3 (3), pp. e084. Date of Electronic Publication: 2020 Jul 10 (Print Publication: 2020).
DOI:	10.1097/OI9.0000000000000084
Abstrakt:	Objectives: To determine the frequency of fixation failure after transsacral-transiliac (TS) screw fixation of vertical shear (VS) pelvic ring injuries (OTA/AO 61C1) and to describe the mechanism of failure of TS screws. Design: Retrospective cohort study. Setting: Level 1 academic trauma center. Patients/participants: Twenty skeletally mature patients with unilateral, displaced, unequivocal VS injuries were identified between May 1, 2009 and April 31, 2016. Mean age was 31 years and mean follow-up was 14 months. Twelve had sacroiliac dislocations (61C1.2) and eight had vertical sacral fractures (61C1.3). Intervention: Operative treatment with at least one TS screw. Main Outcome Measurements: Radiographic failure, defined as a change of >1 cm of combined displacement of the posterior pelvis compared with the intraoperative position on inlet and outlet radiographs. Results: Radiographic failure occurred in 4 of 8 (50%) vertical sacral fractures. Posterior fixation was comprised of a single TS screw in 3 of these 4 failures. The dominant mechanism of screw failure was bending. All of these failures occurred early in the postoperative period. No fixation failures occurred among the sacroiliac dislocations. There were no deep infections or nonunions. Conclusions: This is the first study to describe the mechanism of failure of TS screws in a clinical setting after VS pelvic injuries. We caution surgeons from relying on single TS screw fixation for vertically unstable sacral fractures. Close radiographic monitoring in the first few weeks after surgery is advised. Level of Evidence: Level IV. (Copyright © 2020 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of the Orthopaedic Trauma Association.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu