Internal Fixation

Authors: RYAN R. E. WOLKER, DVM, MVetSc , JAMES L. CARMALT, MA, VetMB, MVetSc, Diplomate ABVP & ACVS , and DAVID G. WILSON, DVM, Diplomate ACVS
Journal: Veterinary Surgery

Objective—To compare the biomechanical characteristics, failure mode, and effects of side (left or right limb) and end (forelimb or hindlimb) of different screws in 2-screw, parallel-screw proximal interphalangeal joint arthrodesis constructs in horses.

Study Design—In vitro experimental study.

Sample Population—Twenty limbs from 6 cadavers (4 complete limb sets, 2 partial sets—total of 4 forelimb and 6 hindlimb pairs).

Authors: R. Reardon, R. Bailey, J. Walmsley, J. Heller, C. Lischer
Journal: Veterinary and Comparative Orthopaedics and Traumatology

Introduction: The mechanical properties of equine cervical vertebrae joined by implants have not yet been reported. Locking compression plates (LCP) may provide a useful alternative system to the commonly used stainless steel kerf-cut cylinders (KCC) currently used for fixation of cervical vertebrae in horses. Objectives: The objectives of this study were to establish a method for biomechanical testing of equine C4-C5 articulations and to compare the biomechanical properties of cadaveric spines stabilised with KCC and LCP.

Authors: JOHN C. JANICEK, DVM, MS, Diplomate ACVS , DAVID A. WILSON, DVM, MS, Diplomate ACVS, WILLIAM L. CARSON, PhD , and JOANNE KRAMER, DVM, Diplomate ACVS
Journal: Veterinary Surgery

ABSTRACT Objective—To compare stiffness and strength of a dynamic condylar screw plate combined with dorsal broad dynamic compression plate (DCS–bDCP) fixation with double broad dynamic compression plate (dbDCP) fixation used to repair oblique distal fractures of adult equine radii. Study Design—Experimental. Sample Population—Adult equine radii (n=10 pair).

Authors: IAN M. WRIGHT, MA, VetMB, DEO, Diplomate ECVS, MRCVS and MATTHEW R. W. SMITH, BVetMed, CertES (Orth), Diplomate ECVS, MRCVS
Journal: Veterinary Surgery

Objectives—To report the technique, observations on fracture configurations and results of treatment by fixation lag screw following the fracture plane determined by an approach to the third metacarpal/metatarsal bone (MC3/MT3) that begins laterally over the metacarpo(metatarso)phalangeal joint and extends dorsally over the diaphysis of the bone. Study Design—Case series. Animals—Thoroughbred horses (n=18) with propagating fractures of the medial condyle of MC3/MT3.

Authors: LEWIS C. R. SMITH, BVetMed , TIMOTHY R. C. GREET, BVMS, MVM, CertEO, DESTS, Diplomate ECVS, FRCVS , and ANDREW P. BATHE, MA, VetMB, DEO, Diplomate ECVS
Journal: Veterinary Surgery

Objective—To describe a lateral approach for screw fixation in lag fashion of simple spiral medial condylar fractures of the third metacarpus/metatarsus (MC3/MT3).

Study Design—Case series.

Animals—Thoroughbred racehorses (n=9).

Authors: Laura J. M. Hirvinen, DVM; Alan S. Litsky, MD, ScD; Valerie F. Samii, DVM; Steven E. Weisbrode, VMD, PhD; Alicia L. Bertone, DVM, PhD
Journal: American Journal of Veterinary Research

Objective—To compare biomechanical strength, interface quality, and effects of bone healing in bone-implant interfaces that were untreated or treated with calcium phosphate cement (Ca-cement), magnesium phosphate cement (Mg-cement), or polymethylmethacrylate (PMMA) in horses.

Animals—6 adult horses.

Authors: RICHARD REARDON, BVetMed , MARTIN KUMMER, DrMedVet,Diplomate ECVS , and CHRISTOPH LISCHER, DrMedVet,Diplomate ECVS
Journal: Veterinary Surgery

Objective—To report a novel technique for cervical vertebral fusion in a foal with cervical vertebral malformation (CVM).

Study Design—Case report.

Authors: YAN LU, MD , BRETT NEMKE, BS, DOUGLAS M. LORANG, PhD , ROEL TRIP, MD , HIROHITO KOBAYASHI, MS, and MARK D. MARKEL, DVM, PhD, Diplomate ACVS
Journal: Veterinary Surgery

Objectives—To compare bone healing of tibial osteotomy repaired with Nitinol wire braid and hardened steel rods (Braid system) and polymethylmethacrylate bone cement with an interlocking intramedullary (IM) nail fixation in an ovine model.

Study Design—In vitro and in vivo experimental study.

Animals—Adult female sheep (n=22).

Authors: Bischofberger, A.S.; Fürst, A.; Auer, J.; Lischer, C.
Journal: Equine Veterinary Journal

Reasons for performing study: Osteosynthesis of third metacarpal (McIII) and third metatarsal (MtIII) bone fractures in horses is a surgical challenge and complications surrounding the repair are common. Retrospective studies evaluating surgical repair, complications and outcome are necessary to increase knowledge and improve success of long bone fracture repair in the horse.

Authors: JEAN-MICHEL E. VANDEWEERD, DVM, DES, Cert ES (Soft Tissue) , ROLAND PERRIN, DVM, Diplomate ECVS , THOMAS LAUNOIS, DVM, Diplomate ECVS , LAURENT BROGNIEZ, DVM, SIMON GEHIN, DVM , PETER D. CLEGG, MA, VetMB, Cert EO, Diplomate ECVS, MRCVS et al.
Journal: Veterinary Surgery

ABSTRACT
Objectives—To compare the precision of radiography and computed tomography (CT) preoperatively in the standing position for identification of guidelines for screw insertion in the distal phalanx, and to identify whether standing CT might improve operative time compared with preoperative radiographic planning.

Study Design—Experimental ex vivo study.

Animals—Cadaveric equine thoracic limb pairs (n=10).

Category: CT - Equine - Internal Fixation