Bone

Authors: M. Kristoffersen, U. Hetzel, T. D. H. Parkin, E. R. Singer
Journal: Veterinary and Comparative Orthopaedics and Traumatology

Objectives: To investigate whether microfractures and alterations in the trabecular bone area are associated with catastrophic bi-axial proximal sesamoid bone fractures (PSBF). Methods: Proximal sesamoid bones (PSB) from 10 racehorses with PSBF and from 10 control racehorses without musculoskeletal injury were examined using the bulk basic fuchsin method. Bone histomorphometric and microfracture analysis was performed, and cases and controls compared using two-sample t-test, paired t-test, and Mann-Whitney U test.

Category: Bone - Equine - Traumatology
Authors: Chrisoula A. Toupadakis, BAS; Alice Wong, PhD; Damian C. Genetos, PhD; Whitney K. Cheung, BS; Dori L. Borjesson, DVM, PhD; Gregory L. Ferraro, DVM; Lawrence D. Galuppo, DVM; J. Kent Leach, PhD; Sean D. Owens, DVM; Clare E. Yellowley; PhD
Journal: American Journal of Veterinary Research

Objective—To determine the optimal osteogenic source of equine mesenchymal stem cells (eMSCs) and optimize collection of and expansion conditions for those cells.

Animals—10 adult Quarter Horses and 8 newborn Thoroughbred foals.

Procedures—eMSCs were isolated from bone marrow (BM), adipose tissue, and umbilical cord blood and tissue, and the osteogenic potential of each type was assessed. Effects of anatomic site, aspiration volume, and serum type on eMSC yield from BM were investigated.

Category: Bone - Equine - Stem cells
Authors: Luis M. Rubio-Martínez, DVM, PhD, DVSc; Antonio M. Cruz, DVM, MVM, MSc, DrMedVet; Dean Inglis, PhD; Mark B. Hurtig, DVM, MVSc
Journal: American Journal of Veterinary Research

Objective—To determine the anisotropic characteristics of the microarchitecture of the subchondral bone (SCB) plate and trabecular bone (TBB) of the distopalmar aspect of the metacarpal condyles in horses with different stages of SCB disease.

Sample Population—12 third metacarpal bone pairs from racing Thoroughbreds euthanized for diverse reasons.

Category: Bone - Equine
Authors: A. FAIRBURN, S. DYSON, R. MURRAY
Journal: Equine Veterinary Journal

Objectives: To verify the sites of insertion of the dorsal metatarsal ligament and the tendons of tibialis cranialis and fibularis tertius in order to determine if periarticular osteophytes and entheseophytes could be differentiated radiologically; and to determine the frequency of occurrence of osseous spurs on the dorsoproximal aspect of MtIII.

Category: Bone - Equine - Osteoarthritis
Authors: S. L. JALIM, C. W. McILWRAITH, N. L. GOODMAN2, G. A. ANDERSON
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: R. A. PARKER, B. M. BLADON, T. D. H. PARKIN, B. S. L. FRASER
Journal: Equine Veterinary Journal

Reasons for performing study: Increased radio-isotope uptake (IRU) in the subchondral bone of the plantaro-lateral condyle of the third metatarsus (MTIII) is a commonly reported scintigraphic finding and potential cause of lameness in UK Thoroughbred racehorses in training and has not been fully documented.

Objectives: To characterise lameness attributable to IRU of the subchondral bone of MTIII, compare the scintigraphic findings of these horses with a normal population and evaluate the use of scintigraphy as an indicator of prognosis.

Category: Bone - Equine - Traumatology
Authors: ABIGAIL N. DIMOCK 1 , MATHIEU SPRIET 2
Journal: Veterinary Radiology and Ultrasound

The effect of the chemical shift artifact, resulting from misregistration or phase cancellation at the interface between compact and trabecular bone, on apparent bone thickness was quantified in six isolated equine limbs. Sagittal T1-weighted spin echo (SE) and in-phase three-dimensional spoiled gradient echo (SPGR) images were acquired twice with a 1.5 T magnetic resonance (MR) unit, switching the frequency encoding direction between acquisitions. Out-of-phase SPGR images were also obtained.

Category: Bone - Equine - Imaging - MRI
Authors: Lucy A. Anthenill, DVM, PhD; Ian A. Gardner, BVSc, PhD; Roy R. Pool, DVM, PhD; Tanya C. Garcia, MS; Susan M. Stover, DVM, PhD
Journal: American Journal of Veterinary Research

Objective—To compare macrostructural and microstructural features of proximal sesamoid bones (PSBs) from horses with and without PSB midbody fracture to gain insight into the pathogenesis of PSB fracture.

Sample Population—PSBs from 16 Thoroughbred racehorses (8 with and 8 without a PSB midbody fracture).

Category: Bone - Equine
Authors: G. Vertenten (1), F. Gasthuys (1), M. Cornelissen (2), E. Schacht (3), L. Vlaminck (1)
Journal: Veterinary and Comparative Orthopaedics and Traumatology

Methods currently used to restore bone defects in human and veterinary orthopaedics are often not satisfactory. This is especially the case in the healing of large, irregular defects which result in the formation of tissues with inferior qualities compared to the original structures. For these reasons, several new approaches are currently being explored to improve bone healing capacities in different situations.

Category: Bone - Equine
Authors: Jonathan S. Merritt, PhD; Marcus G. Pandy, PhD; Nicholas A. T. Brown, PhD; Colin R. Burvill, PhD; Christopher E. Kawcak, DVM, PhD; C. Wayne McIlwraith, BVSc, PhD, DSc; Helen M. S. Davies, PhD
Journal: American Journal of Veterinary Research

Objective—To assess the net mechanical load on the distal end of the third metacarpal bone in horses during walking and trotting.

Animals—3 Quarter Horses and 1 Thoroughbred.

Category: Bone - Equine - Gait analysis