Biomechanical Evaluation of Plate Versus Lag Screw Only Fixation of Distal Fibula Fractures.

Traditional fixation of unstable Orthopaedic Trauma Association type B/C ankle fractures consists of a lag screw and a lateral or posterolateral neutralization plate. Several studies have demonstrated the clinical success of lag screw only fixation; however, to date no biomechanical comparison of the different constructs has been performed. The purpose of the present study was to evaluate the biomechanical strength of these different constructs.

Generation of a Patient-Specific Model of Normal Sagittal Alignment of the Spine.

Study Design: Mathematical modeling of normal sagittal spinal alignment.

Objective: To create a patient specific 3-dimensional (3D) model of normal adolescent spinal shape and alignment.

Summary Of Background Data: Recreating normal sagittal balance is a key goal in spinal deformity surgery.

Sex Differences in Cartilage Topography and Orientation of the Developing Acetabulum: Implications for Hip Preservation Surgery.

Background: Increased attention is being placed on hip preservation surgery in the early adolescent. An understanding of three-dimensional (3-D) acetabular development as children approach maturity is essential. Changes in acetabular orientation and cartilage topography have not previously been quantified as the adolescent acetabulum completes development.

Three-dimensional biplanar radiography as a new means of accessing femoral version: a comparitive study of EOS three-dimensional radiography versus computed tomography.

Objective: To validate femoral version measurements made from biplanar radiography (BR), three-dimensional (3D) reconstructions (EOS imaging, France) were made in differing rotational positions against the gold standard of computed tomography (CT).

Materials And Methods: Two cadaveric femurs were scanned with CT and BR in five different femoral versions creating ten total phantoms. The native version was modified by rotating through a mid-diaphyseal hinge twice into increasing anteversion and twice into increased retroversion.

Loop securities of arthroscopic sliding-knot techniques when the suture loop is not evenly tensioned.

Purpose: The purpose of this study was to evaluate the loop security of arthroscopic sliding knots when tension is only applied to the post strand and not the loop strand.

Methods: Six different locking sliding knots (Weston, Nicky, Roeder, SMC, San Diego, and Dines) were included. Loop securities were evaluated in 2 ways: with a conventional method (equal tension applied to the suture loop) and with a worst-case scenario (WCS) method (only the post strand of the suture loop was tensioned).

Biomechanical analysis of pin placement for pediatric supracondylar humerus fractures: does starting point, pin size, and number matter?

Background: Several studies have examined the biomechanical stability of smooth wire fixation constructs used to stabilize pediatric supracondylar humerus fractures. An analysis of varying pin size, number, and lateral starting points has not been performed previously.

Methods: Twenty synthetic humeri were sectioned in the midolecranon fossa to simulate a supracondylar humerus fracture.

Comparison of 3-dimensional spinal reconstruction accuracy: biplanar radiographs with EOS versus computed tomography.

Study Design: Experimental study for systematic evaluation of 3-dimensional (3D) reconstructions from low-dose digital stereoradiography.

Objective: To assess the accuracy of EOS (EOS Imaging, Paris, France) 3-dimensional (3D) reconstructions compared with 3D computed tomography (CT) and the effect spine positioning within the EOS unit has on reconstruction accuracy.

Summary Of Background Data: Scoliosis is a 3D deformity, but 3D morphological analyses are still rare.