Internal Fixation

Authors: André L. V. Zoppa DVM, PhD, Brandon Santoni PhD, Christian M. Puttlitz PhD, Kayla Cochran PVM, Dean A. Hendrickson DVM, MS, Diplomate ACVS
Journal: Veterinary Surgery

Objectives: To compare the biomechanical characteristics of 2 arthrodesis techniques for the equine proximal interphalangeal joint (PIP) using either a 3-hole 4.5 mm locking compression plate (LCP) or 3-hole 4.5 mm narrow dynamic compression plate (DCP), both with 2 transarticular 5.5 mm cortex screws.

Study Design: Experimental.

Sample Population: Cadaveric adult equine forelimbs (*n=6 pairs).

Authors: William True Baker DVM, Donnie E. Slone DVM, MS, Diplomate ACVS, Timothy M. Lynch DVM, Diplomate ACVS, Christopher R. Johnson DVM, MS, Diplomate ACVS, William A. Baker DVM
Journal: Veterinary Surgery

Objective: To evaluate the racing and sales performance of Thoroughbred horses with varus angular limb deformities of the carpus treated by unilateral or bilateral single transphyseal screw (STS) placement.

Study Design: Case series.

Animals: Thoroughbred horses (n=53).

Authors: Jose J. Bras DVM, MS, James D. Lillich DVM, MS, Diplomate ACVS, Warren L. Beard DVM, MS, Diplomate ACVS, David E. Anderson DVM, MS, Diplomate ACVS, Laura J. Armbrust DVM, Diplomate ACVR, Elizabeth Frink, Kevin Lease PhD
Journal: Veterinary Surgery

Objective: To (1) compare the effect of a collateral ligament sparing surgical approach with an open surgical approach on mechanical properties of proximal interphalangeal joint (PIPJ) arthrodesis, and (2) to determine the percentage of articular cartilage surface removed by transarticular (TA) drilling with different diameter drill bits.

Study Design: Randomized paired limb design.

Sample Population: Cadaveric equine limbs (n=76).

Authors: Roland Perrin DVM, Diplomate ECVS, Thomas Launois DVM, Diplomate ECVS, Laurent Brogniez DVM, Francis G. Desbrosse DVM, Diplomate ECVS, Richard P. Coomer MA, VetMB Cert ES, Diplomate ECVS, MRCVS et al.
Journal: Veterinary Surgery

Objective: To assess the reliability of computed tomography (CT) to identify the direction of implant insertion for cortical screws along the longitudinal axis of intact (nonfractured) distal sesamoid bones.

Study Design: In vitro study.

Sample Population: Cadaveric paired equine forelimbs (n=16).

Category: CT - Equine - Internal Fixation
Authors: Andrew R. Fiske-Jackson BVSc, Andrew L. Crawford BVetMed Cert ES (Orth), R. Michael Archer BVSc, Diplomate ACVS, David M. Bolt DVM, Diplomate ACVS, Roger K. Smith MA, Vet MB, PhD, DEO, Diplomate ECVS
Journal: Veterinary Surgery

Objective: To describe the diagnosis and treatment of fractures of the deltoid tuberosity. Study Design: Case series. Methods: Medical records (1992–2009) of 19 horses with radiographic confirmation of deltoid tuberosity fractures were reviewed. Data retrieved included signalment, clinical and diagnostic imaging findings, and treatment. Outcome was determined by telephone questionnaire of owners and referring veterinarians. Results: Most horses were markedly lame on admission and 53% had reduced protraction of the affected limb.

Authors: Richard J. M. Reardon BVetMed, Diplomate ECVS, Robert Bailey PhD, John P. Walmsley VetMB, Diplomate ECVS, Jane Heller BSc, BVSc, DipVetClinStud, Christoph Lischer DrMedVet, Diplomate ECVS
Journal: Veterinary Surgery

Objectives: To (1) define mechanical properties in flexion, extension, and left lateral bending of cadaveric equine 4th and 5th cervical (C4–C5) articulations, (2) compare biomechanical properties of C4–C5 when stabilized with a kerf cut cylinder (KCC) compared with a ventrally placed 4.5 mm locking compression plate (LCP).

Study Design: In vitro biomechanical investigation.

Sample Population: Cadaveric adult equine cervical vertebral columns (n=54).

Authors: R. A. Wall, P. Robinson, A. R. Adkins
Journal: Equine Veterinary Education

This report describes and evaluates the use of a single-positional absorbable screw (Smart Screw)1 as a temporary transphyseal bridge of the lateral aspect of the distal metacarpus in 6 foals with fetlock varus deformities. Using radiographic and visual assessments, an improvement in the severity of the deviation was identified in all cases. There were no complications encountered during screw placement or post operatively.

Authors: Gary A. Sod DVM, PhD, Laura M. Riggs DVM, PhD, Diplomate ACVS, Colin F. Mitchell BVMS, MS, Diplomate ACVS, George S. Martin DVM, MS, MBA, Diplomate ACVS, Marjorie S. Gill DVM, MS, Diplomate ABVP
Journal: Veterinary Surgery

Objectives: To compare number of cycles to failure for palmarodorsal 4-point bending of a modified 5.5 mm broad locking compression plate (M5.5-LCP) fixation with a 5.5 mm broad LCP (5.5-LCP) fixation used to repair osteotomized equine third metacarpal (MC3) bones.

Study Design: In vitro biomechanical testing.

Animal Population: Adult equine cadaveric MC3 bones (n=6 pairs).

Journal: Equine Veterinary Journal

Reasons for performing study: The effectiveness and best method to manage dorsal cortical stress fractures is not clear. This study was performed to evaluate the success of lag screw fixation of such fractures in a population of Thoroughbred racehorses.

Hypothesis: Lag screw fixation of dorsal cortical stress fractures is an effective surgical procedure allowing racehorses to return to their preoperative level of performance.

Authors: Benjamin J. Ahern BVSc, Dean W. Richardson DVM
Journal: Veterinary Surgery

Objectives: To report repair of a comminuted distal humeral type II Salter–Harris fracture using an ulnar osteotomy approach and locking compression plates (LCP).

Study Design: Case report.

Animal: A 3-month-old Standardbred filly with a type II Salter–Harris fracture of the distal humerus.