Bone

Authors: Julien Olive, DMV, MSc; Marc-André d'Anjou, DMV; Kate Alexander, DMV, MS; Guy Beauchamp, PhD; Christine L. Theoret, DMV, PhD
Journal: American Journal of Veterinary Research

Objective—To evaluate the ability of signal attenuation–based quantitative magnetic resonance imaging (QMRI) to estimate subchondral bone mineral density (BMD) as assessed via quantitative computed tomography (QCT) in osteoarthritic joints of horses.

Sample Population—20 metacarpophalangeal joints from 10 horse cadavers.

Category: Bone - Comparative Study - CT - Equine - Imaging - MRI
Authors: C. Kearney, H. McAllister and F. Jenner
Journal: Equine Veterinary Education

A comminuted fracture of the central tarsal bone, fragmentation of the fourth tarsal bone and associated joint instability was diagnosed in a 14-year-old Sport Horse mare who presented for investigation of acute nonweightbearing hindlimb lameness. The mare responded well to conservative management and, unlike previously reported cases of similar injuries, returned to a similar level of athletic activity.

Category: Bone - Equine - Traumatology
Authors: S. E. POWELL, P. H. L. RAMZAN † , M. J. HEAD, M. C. SHEPHERD † , G. I. BALDWIN † and W. N. STEVEN †
Journal: Equine Veterinary Journal

Reason for performing study: The proximal metacarpal region is a common site of origin of lameness in the performance horse. A number of disease entities are recognised as causes of proximal metacarpal lameness but a definitive diagnosis is often elusive. Magnetic resonance imaging (MRI) is hypothesised to offer advantages over traditional imaging modalities in the investigation of proximal metacarpal pain.

Category: Bone - Equine - MRI
Authors: S. M. HENDRIX, G. M. BAXTER, C. W. Mc ILWRAITH † ‡ , D. A. HENDRICKSON, L. R. GOODRICH, D. D. FRISBIE † and G. W. TROTTER §
Journal: Equine Veterinary Journal 2010

Reasons for performing study: Medial meniscal injuries and subchondral cystic lesions (SCL) are known to occur independently within the medial femorotibial (MFT) joint in horses. However, there are no reports of a potential clinical relationship between these 2 types of lesions.

Objectives: To: 1) document the concurrent presence or sequential development of medial meniscal and SCL of the medial femoral condyle within the MFT joint; and 2) determine the prognosis with both types of lesions.

Authors: JOHN C. JANICEK, DVM, MS, Diplomate ACVS 1 , JAMES L. COOK, DVM, PhD, Diplomate ACVS 1 , DAVID A. WILSON, DVM, MS, Diplomate ACVS 1 , and KARISSA M. KETZNER, DVM 1
Journal: Veterinary Surgery

Objective—To adapt the multiple osteochondral autograft technique for treatment of a subchondral cystic lesion (SCL) of the proximal medial trochlear ridge (MTR) of the equine talus and assess long term outcome.

Study Design—Case report.

Animals—Quarter horse stallion with SCL of the proximal MTR of the talus.

Category: Bone - Cartilage - Equine
Authors: HAYLEY M. LANG 1 , LUCA PANIZZI, Dr Med Vet 1 , ANDREW L. ALLEN, DVM, MVetSc, PhD 1 , MURRAY R. WOODBURY, DVM, MSc 1 , and SPENCER M. BARBER, DVM, Diplomate ACVS 1
Journal: Veterinary Surgery

Objective: To evaluate 3 drilling techniques for arthrodesis of the equine carpometacarpal (CMC) joint.

Study Design: Experimental study.

Sample Population: Cadaveric equine forelimbs (n=15).

Category: Bone - Equine
Authors: Juan J. Tabar-Rodriguez, DVM, MS; Antonio M. Cruz, DVM, MVM, MS, DrMedVet; Gabrielle Monteith, BS; Karen Gordon, PhD; Mark B. Hurtig, DVM, MVSc
Journal: American Journal of Veterinary Research

Objective—To use quantitative ultrasonography to evaluate the association between the speed of sound (SOS) at 9 sites in the third metacarpal bone (MCIII) of racing Thoroughbreds with workload accumulation and the effect that MCIII failure has on this association.

Animals—Sixty-two 2- and 3-year-old Thoroughbreds in racing condition.

Category: Bone - Equine - Ultrasound
Authors: Carolyne A. Tranquille, BSc; Antony S. Blunden, PhD; Sue J. Dyson, PhD; Tim D. H. Parkin, PhD; Allen E. Goodship, PhD; Rachel C. Murray, PhD
Journal: American Journal of Veterinary Research

Objective—To investigate effects of exercise on hyaline cartilage (HC), calcified cartilage (CC), and subchondral bone (SCB) thickness patterns of equine tarsi.

Sample Population—30 tarsi from cadavers of horses with known exercise history.

Category: Bone - Cartilage - Equine
Authors: Roberts, B.L.; Railton, D.; Adkins, A.R.
Journal: Equine Veterinary Education

A single screw technique is described as a temporary transphyseal bridge for the treatment of fetlock varus angular limb deformity in foals. This has been compared to tension band wiring with regards to rate of correction, cosmetic result and incidence of complications. The single screw was found to be an effective technique resulting in more rapid improvement of deviations in foals aged up to 5 months. Complications were minimal following both techniques and the final cosmetic result was better following single screw surgery.

Authors: Montgomery, L.J.; Juzwiak, J.S.
Journal: Equine Veterinary Education

Subchondral cyst-like lesions (SCLs) of horses have been found in various locations, but SCLs of the talus have been reported rarely. In this report, we describe 4 horses affected with a SCL of the talus. Each SCL was identified using digital radiography, and each horse was treated by intralesional injection of triamcinolone acetonide. Case details, history, findings during clinical and radiographic examination, treatment, and outcome of each horse are discussed.

Category: Bone - Equine - Osteochondrosis