Analysis of the short-term effect of three different level pedicle screws in the treatment of thoracolumbar type A fractures.

Objective: The effects of three short-segment vertebral fixation methods-short-segment fixation (4s group), short-segment fixation across the injured vertebra (6s group), and long-segment fixation (8s group)-on the surgical efficacy of patients with type A thoracolumbar fractures were compared to identify the optimal fixation method.

Methods: Data from 277 patients who underwent posterior pedicle screw fixation for thoracolumbar fractures between September 2018 and January 2023 were retrospectively analyzed. Surgery-related indicators, laboratory parameters, clinical functional measures (VAS and ODI), and postoperative imaging findings were compared among the three groups.

The significance of reduction of valgus-intercalated femoral neck fracture with valgus angle > 15°and the selection of internal fixation by finite element analysis.

Background: Currently, consensus is lacking on the necessity of internal fixation after reducing valgus-intercalated femoral neck fractures with abduction > 15°. This study employs finite element analysis to compare the biomechanical differences between the femoral neck dynamic cross nail system (FNS) and inverted cannulated screw (ICS), aiming to provide a foundation for clinical procedures.

Methods: Human femur CT scan data were processed using MimICS21.