Forcefully Engaging Rods into Tulips with Gap Discrepancy Leading to Pedicle Screw Loosening – A Biomechanical Analysis Using Long Porcine Spine Segments

Long-segment pedicle screw instrumentation is widely used to treat complex spinal disorders. Rods are routinely precontoured to maximize assistance on the correcting side of the deformity, but there often exists a residual gap discrepancy between the precontoured rods and screw tulips. No previous research has investigated the diminished pullout strength of the most proximal or distal pedicle screw resulting from a mismatched rod in long-segment pedicle screw instrumentation.

Source: The Spine Journal - March 16, 2024 Category: Orthopaedics Authors: Ming-Kai Hsieh, De-Mei Lee, Weng-Pin Chen, Yun-Da Li, Fu-Cheng Kao, Yue-Chen Lin, Tsung-Ting Tsai, Po-Liang Lai, Ching-Lung Tai Tags: Basic Science Source Type: research