OAR Audio Series

Evaluation of Fixation Constructs for Femoral Neck Fracture: a Sawbones Biomechanical Model

The full abstract can be found at the OAR website: Evaluation of Fixation Constructs for Femoral Neck Fracture: a Sawbones Biomechanical Model [https://orthoabstracts.com/evaluation-of-fixation-constructs-for-femoral-neck-fracture-a-sawbones-biomechanical-model-2/] This document details a biomechanical study comparing two different femoral neck fracture fixation devices using Sawbones femur models. The research focused on evaluating the SimpliFix Hip System against a standard cannulated screw construct in terms of maintaining fracture gap area, resisting femoral head rotation, preventing screw displacement, and cycles to failure. The study's methods involved preconditioning and dynamic cyclic loading to mimic real-world conditions. Results indicated the SimpliFix system significantly outperformed the control group in resisting fracture gap collapse and screw displacement. The findings suggest that the SimpliFix system could clinically improve outcomes by reducing complications like femoral neck shortening and gait disturbance.

Negative Stress Examination Under Anesthesia Predicts Pelvic Ring Union without Displacement

The full abstract can be found at the OAR website: Negative Stress Examination Under Anesthesia Predicts Pelvic Ring Union without Displacement [https://orthoabstracts.com/negative-stress-examination-under-anesthesia-predicts-pelvic-ring-union-without-displacement/] This research study, presented at the 2017 AAOS Annual Meeting, investigates the predictive power of a negative Examination Under Anesthesia (EUA) for pelvic ring injuries. The authors, from various orthopaedic institutions, aimed to determine if a negative EUA accurately forecasts a pelvic ring union without displacement. Their methods involved reviewing data from patients at multiple trauma centers who underwent pelvic EUA. The results indicate that a negative EUA reliably predicts successful healing without further displacement, even allowing for immediate weight-bearing unless other injuries prevent it.

Safe Corridor Trajectory in Navigated Sacral Fixation

The full abstract can be found at the OAR website: Safe Corridor Trajectory in Navigated Sacral Fixation [https://orthoabstracts.com/preplanning-safe-corridor-trajectory-in-navigated-sacral-fixation-a-useful-technique-for-learning-pelvic-navigation/] This article introduces a pre-planning technique for sacral fixation using the StealthStation Surgical Navigation System, aiming to enhance safety and efficiency for surgeons, especially those new to pelvic navigation. It addresses the challenges of atypical imaging views presented by the navigation system, which can be disorienting for surgeons accustomed to traditional fluoroscopy. The described method involves planning implant trajectories on axial and coronal views after image acquisition but before intraoperative tracking, allowing for thorough evaluation of safe corridors. This strategic pre-assessment minimizes the need for extensive mental calculation during surgery and helps overcome limitations posed by difficult-to-assess imaging due to patient factors like body habitus or bone quality. The technique ultimately reduces frustration and supports the confident placement of implants.