Biomechanics

The effect of surgical revascularization on the mechanical properties of cryopreserved bone allograft in a porcine tibia model
Authors: Noortje Visser, Elisa Rezaie, Alexandra Ducharme, Alexander Y Shin, Allen T Bishop

Cryopreserved bone allografts(CBA) are susceptible to infection, nonunion, and late stress fracture. Although surgical revascularization by intramedullary implantation of an arteriovenous bundle (AV bundle) generates a neoangiogenic blood supply, there is potential for vascular ingrowth-mediated bone resorption to weaken the graft.

Category: Biomechanics - Tibia
Biomechanical evaluation of a 4.75-mm and a 5.5-mm bone anchor at two insertion angles using one and two strands of suture
Authors: Sarah A. Salyer, Jonathan T. Suber, Lucia M. Melara, Nina R. Kieves

OBJECTIVE To compare biomechanical strength of 4.75- and 5.5-mm suture anchors when pulled at 45° or 90° angles using 1 versus 2 strands of suture.

SAMPLE 48 synthetic bone block samples.

PROCEDURES Anchors were inserted into synthetic bone blocks and tested for pullout in 4 configurations (1 suture strand vs 2 strands and 45° vs 90° insertion angle) for a total of 8 groups with 6 samples each. A 3-way ANOVA was used to compare effect of anchor size, strand amount, and angle of pull.

Category: Biomechanics
Transference of reference intervals for variables of instrumented gait analysis in walking dogs
Authors: Anastasia M Olsen, Nicolaas E Lambrechts, Hsin-Yi Weng, Kristine A Kazmierczak, Felix M Duerr, Gert J Breur

Objective: To use the small data approach of the Clinical and Laboratory Standards Institute (CLSI) to evaluate the transferability of reference intervals (RIs) for kinetic variables obtained with instrumented gait analysis (IGA) in dogs from an RI-originator laboratory to another laboratory that used the same data acquisition and analytic techniques for IGA in walking dogs.

Animals: 27 adult client-owned dogs without evidence of lameness.

Category: Biomechanics
Biomechanical Evaluation of an Autologous Flexor Digitorum Lateralis Graft to Augment the Surgical Repair of Gastrocnemius Tendon Laceration in a Canine Ex Vivo Model
Authors: Daniel J Duffy, Chiara P Curcillo, Yi-Jen Chang, Lewis Gaffney, Matthew B Fisher, George E Moore

Objective: To evaluate the effect of an autologous flexor digitorum lateralis (FDL) graft to augment a three-loop pulley (3LP) core repair in a canine cadaveric gastrocnemius tendon (GT) laceration model.

Study design: Ex vivo, biomechanical study.

Sample population: Twenty-six canine cadaveric hind limbs.

Category: Biomechanics - Tendon and Ligament Injuries
Contribution of Palmar Radiocarpal and Ulnocarpal Ligaments to the Stability of the Canine Antebrachiocarpal Joint
Authors: Milgram J, Stockman J, Segev G, Meiner Y, Shipov A

OBJECTIVE: The aim of this study was to evaluate the contribution of the palmar radiocarpal ligament and the palmar ulnocarpal ligament to canine antebrachiocarpal joint stability.

Category: Biomechanics - Tendon and Ligament Injuries
The effect of TPLO on patellofemoral kinematics in dogs: An in vivo study
Authors: Zann GJ, Kim SE, Tinga S, Pozzi A, Banks SA

OBJECTIVE: To quantitatively evaluate patellofemoral (PF) kinematics during walking in dogs with cranial cruciate ligament (CrCL) deficiency treated by tibial plateau leveling osteotomy (TPLO).

STUDY DESIGN: Longitudinal observational study.

Category: Biomechanics - Osteotomy/Ostectomy - Stifle
Comparison of cross-sectional geometrical properties and bone density of the proximal radius between Saint Bernard and other giant breed dogs
Authors: Mejia S, Iodence A, Griffin L, Withrow S, Puttlitz C, Salman M, Seguin B

OBJECTIVE: To compare the geometrical properties and bone mineral density (BMD) of the proximal radius between Saint Bernard and other giant breed dogs.

Category: Biomechanics - Radius/Ulna