Biomechanical evaluation of location and mode of failure in three screw fixations for a comminuted transforaminal sacral fracture model.

ABSTRACT:

Background

Pelvic ring-comminuted transforaminal sacral fracture injuries are rotationally and vertically unstable and have a high rate of failure.

Objective

Our study purpose was to use three-dimensional (3D) optical tracking to detect onset location of bone-implant interface failure and measure the distances and angles between screws and line of applied force for correlation to strength of pelvic fracture fixation techniques.

Methods

3D relative motion across sacral-rami fractures and screws relative to bone was measured with an optical tracking system. Synthetic pelves were used. Comminuted transforaminal sacral-rami fractures were modelled. Each pelvis was stabilised by either (1) two iliosacral screws in S1, (2) one transsacral screw in S1 and one iliosacral scre

SUBMITTER: Crist BD 

PROVIDER: S-EPMC6350021 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature