Fracture Fixation and Implants

Authors: Joseph S Raleigh, Barbro Filliquist, Amy S Kapatkin, Po Yen Chou, Denis J Marcellin-Little, Tanya C Garcia, Kevin L Jacques, Susan M Stover

Objective: To determine the influence of interlocking screw threads on the biomechanical properties of repaired canine humeral condylar fractures.

Study design: Ex vivo biomechanical study.

Sample population: Thirty-six humeral condyles.

Authors: R Vallefuoco, F Bird, I Gordo, H Brissot, C Fina

Introduction: Major goals in maxillofacial fracture treatment include to restore the dental occlusion, stabilise the major skeletal supports, restore the contour of the face and achieve proper function and appearance of the face. Titanium is considered an optimal material for maxillofacial reconstruction due to its biocompatibility, high strength, minimal inflammatory reaction and minimal imaging artefact.

Authors: Jaron H Naiman, Eric M Zellner, Brian L Petrovsky, Thomas O Riegel, Elizabeth M Schmitt, Lingnan Yuan, Jonathan P Mochel, Karl H Kraus

Objective: To determine radiation exposure to surgical personnel and to evaluate the accuracy of a modified percutaneous lag screw fixation technique for sacroiliac luxation (SIL) under fluoroscopic guidance in dogs.

Study design: Cadaveric experimental study.

Sample population: Seventeen beagle cadavers with iatrogenic SIL.

Authors: Tijn Wiersema, Ties Koolen, Lars F H Theyse, Roelof J Maarschalkweerd, Cornelis D van Zuilen, Sarah J van Rijn

Objective: The aim of this study was to compare the frequency of implant failure and the extent of pelvic canal narrowing associated with the fixation of ilial fractures in cats with a single veterinary cuttable plate (SLP) or double veterinary cuttable plates (DLP) applied to the lateral surface of the ilium.

Authors: Ruisen Fu, Yili Feng, Youjun Liu, Bettina M Willie, Haisheng Yang

Dynamization, increasing the interfragmentary movement (IFM) by reducing the fixation stiffness from a rigid to a more flexible condition, is widely used clinically to promote fracture healing. However, it remains unknown how dynamization degree (relative change in fixation stiffness/IFM from a rigid to a flexible fixation) affects bone healing at various stages.

Authors: Brian Petrovsky, Taylor Knuth, Cristina Aponte-Colón, William Hoefle, Karl Kraus, Jaron Naiman, Lingnan Yuan, Jonathan P Mochel, Eric Zellner

Objective: To determine the influence of plating systems on the clinical outcomes in dogs treated for ilial fractures.

Design: Retrospective study.

Animals: Fifty-nine dogs (63 hemipelves).

Authors: Verpaalen D Verpaalen, Daniel D Lewis, Gary A Billings

Objective: The aim of this study was to compare the biomechanical properties of a hybrid external skeletal fixator (HESF) construct to the placement of paired interfragmentary Kirschner wires alone, and pin and tension band wire (PTBW) fixation for the stabilization of simulated tibial tuberosity fractures in dogs.

Authors: D Carwardine, N J Burton, T G Knowles, N Barthelemy, K J Parsons

Objectives: To describe the surgical technique and complications for fluoroscopically guided transcondylar screw placement for humeral intracondylar fissure in dogs.

Materials and methods: A retrospective review was undertaken of cases from two hospitals where identical surgical technique was employed. Factors were analysed for any association with postoperative complications.

Authors: Ruisen Fu, Yili Feng, Youjun Liu, Bettina M Willie, Haisheng Yang

Dynamization, increasing the interfragmentary movement (IFM) by reducing the fixation stiffness from a rigid to a more flexible condition, is widely used clinically to promote fracture healing. However, it remains unknown how dynamization degree (relative change in fixation stiffness/IFM from a rigid to a flexible fixation) affects bone healing at various stages.

Authors: Valentine D Verpaalen, Daniel D Lewis

Case description: 3 juvenile (4 to 5 months of age) medium- to large-breed or crossbred dogs were evaluated for sudden unilateral non-weight-bearing lameness in a pelvic limb after a fall during strenuous activity.