1
|
Stedman JM, Lutter JD, Hallman C, Laverty S, Richard H, Santschi EM. Ex vivo evaluation of the soft tissue components of the equine stifle using 3 Tesla magnetic resonance imaging under flexion, extension, and loading. Vet Radiol Ultrasound 2024. [PMID: 38970336 DOI: 10.1111/vru.13405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/07/2024] [Accepted: 06/17/2024] [Indexed: 07/08/2024] Open
Abstract
High-field MRI of the equine stifle provides high-resolution information about soft tissues that is useful in the diagnosis of stifle lameness. The aim of this prospective anatomic study was to describe the appearance, position, size, and shape of the equine femorotibial ligaments, meniscal ligaments, and menisci using 3 Tesla MRI under extended, extended-loaded, and flexed conditions. Additionally, histologic examination of the collateral and cruciate ligaments (CLs) of a single stifle was performed to compare with MRI images. In extension, mild variations in MRI signal intensity were apparent in the CLs, and the cranial had two distinct longitudinal regions indicating two ligament bundles. Flexion had minor effects on CL signal intensity and altered the tibial angles of attachment. Histology indicated that both CLs were comprised of two fiber bundles. The collateral ligaments were the same low-signal intensity. The medial collateral ligament had a smaller cross-sectional area than the lateral, and flexion increased the length of the medial collateral ligament and the cross-sectional area of the lateral. Low loads in extension did not affect the MRI appearance of stifle soft tissues. Flexion of the stifle impacted cruciate ligament insertion angles and the size and shape of collateral ligaments. This study provides support for the use of MRI to understand the anatomy and function of stifle ligaments.
Collapse
Affiliation(s)
- Jocelyn M Stedman
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| | - J Dylan Lutter
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| | - Clay Hallman
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| | - Sheila Laverty
- Comparative Orthopaedic Research Laboratory, Département des Sciences Cliniques, Faculté de médecine vétérinaire, Université de Montréal, Saint Hyacinthe, Quebec, Canada
| | - Hélène Richard
- Comparative Orthopaedic Research Laboratory, Département des Sciences Cliniques, Faculté de médecine vétérinaire, Université de Montréal, Saint Hyacinthe, Quebec, Canada
| | - Elizabeth M Santschi
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
| |
Collapse
|
2
|
Lang JJ, Li X, Micheler CM, Wilhelm NJ, Seidl F, Schwaiger BJ, Barnewitz D, von Eisenhart-Rothe R, Grosse CU, Burgkart R. Numerical evaluation of internal femur osteosynthesis based on a biomechanical model of the loading in the proximal equine hindlimb. BMC Vet Res 2024; 20:188. [PMID: 38730373 PMCID: PMC11084081 DOI: 10.1186/s12917-024-04044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 04/29/2024] [Indexed: 05/12/2024] Open
Abstract
Femoral fractures are often considered lethal for adult horses because femur osteosynthesis is still a surgical challenge. For equine femur osteosynthesis, primary stability is essential, but the detailed physiological forces occurring in the hindlimb are largely unknown. The objective of this study was to create a numerical testing environment to evaluate equine femur osteosynthesis based on physiological conditions. The study was designed as a finite element analysis (FEA) of the femur using a musculoskeletal model of the loading situation in stance. Relevant forces were determined in the musculoskeletal model via optimization. The treatment of four different fracture types with an intramedullary nail was investigated in FEA with loading conditions derived from the model. The analyzed diaphyseal fracture types were a transverse (TR) fracture, two oblique fractures in different orientations (OB-ML: medial-lateral and OB-AP: anterior-posterior) and a "gap" fracture (GAP) without contact between the fragments. For the native femur, the most relevant areas of increased stress were located distally to the femoral head and proximally to the caudal side of the condyles. For all fracture types, the highest stresses in the implant material were present in the fracture-adjacent screws. Maximum compressive (-348 MPa) and tensile stress (197 MPa) were found for the GAP fracture, but material strength was not exceeded. The mathematical model was able to predict a load distribution in the femur of the standing horse and was used to assess the performance of internal fixation devices via FEA. The analyzed intramedullary nail and screws showed sufficient stability for all fracture types.
Collapse
Affiliation(s)
- Jan J Lang
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany.
- Chair of Non-destructive Testing, TUM School of Engineering and Design, Technical University of Munich, Munich, Germany.
| | - Xinhao Li
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Carina M Micheler
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
- Institute for Machine Tools and Industrial Management, TUM School of Engineering and Design, Technical University of Munich, Munich, Germany
| | - Nikolas J Wilhelm
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
- Munich Institute of Robotics and Machine Intelligence, Department of Electrical and Computer Engineering, Technical University of Munich, Munich, Germany
| | - Fritz Seidl
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Benedikt J Schwaiger
- Department of Diagnostic and Interventional Neuroradiology, TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Dirk Barnewitz
- Equine Clinic of the Research Centre for Medical Technology and Biotechnology, Bad Langensalza, Germany
| | - Ruediger von Eisenhart-Rothe
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Christian U Grosse
- Chair of Non-destructive Testing, TUM School of Engineering and Design, Technical University of Munich, Munich, Germany
| | - Rainer Burgkart
- Department of Orthopedics and Sports Orthopedics, Klinikum rechts der Isar, TUM School of Medicine, Technical University of Munich, Munich, Germany
| |
Collapse
|
3
|
Fugazzola M, Nissinen MT, Jäntti J, Tuppurainen J, Plomp S, Te Moller N, Mäkelä JTA, van Weeren R. Composition, architecture and biomechanical properties of articular cartilage in differently loaded areas of the equine stifle. Equine Vet J 2024; 56:573-585. [PMID: 37376723 DOI: 10.1111/evj.13960] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 05/05/2023] [Indexed: 06/29/2023]
Abstract
BACKGROUND Strategies for articular cartilage repair need to take into account topographical differences in tissue composition and architecture to achieve durable functional outcome. These have not yet been investigated in the equine stifle. OBJECTIVES To analyse the biochemical composition and architecture of three differently loaded areas of the equine stifle. We hypothesise that site differences correlate with the biomechanical characteristics of the cartilage. STUDY DESIGN Ex vivo study. METHODS Thirty osteochondral plugs per location were harvested from the lateral trochlear ridge (LTR), the distal intertrochlear groove (DITG) and the medial femoral condyle (MFC). These underwent biochemical, biomechanical and structural analysis. A linear mixed model with location as a fixed factor and horse as a random factor was applied, followed by pair-wise comparisons of estimated means with false discovery rate correction, to test for differences between locations. Correlations between biochemical and biomechanical parameters were tested using Spearman's correlation coefficient. RESULTS Glycosaminoglycan content was different between all sites (estimated mean [95% confidence interval (CI)] for LTR 75.4 [64.5, 88.2], for intercondylar notch (ICN) 37.3 [31.9, 43.6], for MFC 93.7 [80.1109.6] μg/mg dry weight), as were equilibrium modulus (LTR2.20 [1.96, 2.46], ICN0.48 [0.37, 0.6], MFC1.36 [1.17, 1.56] MPa), dynamic modulus (LTR7.33 [6.54, 8.17], ICN4.38 [3.77, 5.03], MFC5.62 [4.93, 6.36] MPa) and viscosity (LTR7.49 [6.76, 8.26], ICN16.99 [15.88, 18.14], MFC8.7 [7.91,9.5]°). The two weightbearing areas (LTR and MCF) and the non-weightbearing area (ICN) differed in collagen content (LTR 139 [127, 152], ICN176[162, 191], MFC 127[115, 139] μg/mg dry weight), parallelism index and angle of collagen fibres. The strongest correlations were between proteoglycan content and equilibrium modulus (r: 0.642; p: 0.001), dynamic modulus (r: 0.554; p < 0.001) and phase shift (r: -0.675; p < 0.001), and between collagen orientation angle and equilibrium modulus (r: -0.612; p < 0.001), dynamic modulus (r: -0.424; p < 0.001) and phase shift (r: 0.609; p < 0.001). MAIN LIMITATIONS Only a single sample per location was analysed. CONCLUSIONS There were significant differences in cartilage biochemical composition, biomechanics and architecture between the three differently loaded sites. The biochemical and structural composition correlated with the mechanical characteristics. These differences need to be acknowledged by designing cartilage repair strategies.
Collapse
Affiliation(s)
- Maria Fugazzola
- Department of Equine Sciences, Utrecht University, Utrecht, The Netherlands
| | - Mikko T Nissinen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Jiri Jäntti
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
- Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland
| | - Juuso Tuppurainen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Saskia Plomp
- Department of Equine Sciences, Utrecht University, Utrecht, The Netherlands
| | - Nikae Te Moller
- Department of Equine Sciences, Utrecht University, Utrecht, The Netherlands
| | - Janne T A Mäkelä
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
- Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland
| | - Rene van Weeren
- Department of Equine Sciences, Utrecht University, Utrecht, The Netherlands
| |
Collapse
|
4
|
Santschi EM. Equine subchondral lucencies: Knowledge from the medial femoral condyle. Vet Surg 2024; 53:426-436. [PMID: 38229531 DOI: 10.1111/vsu.14062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/25/2023] [Accepted: 12/02/2023] [Indexed: 01/18/2024]
Abstract
Equine subchondral lucencies (SCL) have been described since the first availability of suitable radiographic equipment. The initial clinical sign can be lameness, but SCLs are often first found on surveys of juvenile horses and are primarily a radiographic concern for public auctions. When lameness is present, it varies from subtle to obvious and can be intermittent. Some SCLs heal spontaneously, and some remain blemishes, but when the SCL and lameness are persistent, further damage to the joint and limitations to an athletic career are likely. SCLs were initially described in the distal limb followed by the stifle, and the medial femoral condyle (MFC) is now considered the most common location. The aim of this review is to highlight the initial pathology and discuss the clinical and experimental information available on equine SCLs. SCL treatment has evolved from rest alone and has progressed to debridement, grafting, intralesional injection, and most recently, transcondylar screw and absorbable implant placement. Comparison of success rates between techniques is difficult due to variations in follow-up and outcome measures, and no single technique is best for all SCLs. Treatment appears to increase success by 15%-20% over rest alone, but the method chosen depends on many factors. This review emphasizes the need for further work to fully understand SCL formation and all aspects of trabecular bone healing to optimize surgical therapy and improve treatment success.
Collapse
|
5
|
Bowers K, Weinhandl JT, Anderson DE. A review of equine tibial fractures. Equine Vet J 2023; 55:171-181. [PMID: 35569040 PMCID: PMC10084381 DOI: 10.1111/evj.13599] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/11/2022] [Indexed: 11/28/2022]
Abstract
Equine tibial fractures are relatively infrequent in racing and non-racing sport horses, but limitations in successful treatment of tibial fractures in adult horses result in relatively high mortality compared with other musculoskeletal injuries. The aetiology of tibial fracture can be classified into two general categories: traumatic impact or fatigue failure. Tibial stress fractures, also known as fatigue fractures, are often rated as the second most common stress fracture in racing Thoroughbreds; young age, early stage in race training, and initiation of training after a period of rest are the reported risk factors. Both impact and fatigue fracture propagation are dependent on the magnitude of force applied and on the local composition/alignment of mineralised collagen in the tibial lamella. Extensive research has characterised the pattern of strain distribution and stress remodelling within the equine tibia, but in vivo measurement of load and angular moments are currently not feasible. Further research is warranted to correlate biomechanical theory of tibia fatigue fracture propagation with current histopathological data. Preventative measures for fatigue fractures aim to optimise diagnostic efficiency, reduce the interval between injury and diagnosis and modify racing and training conditions to reduce non-specific fracture risk. Treatment options for complete tibial fractures in adult horses are limited, but with careful case selection, successful outcomes have been reported after open reduction and internal fixation. On the other hand, tibial stress fractures and minimally displaced incomplete fractures are typically treated conservatively and have good prognosis for athletic recovery. This review aims to describe the current literature regarding tibial fracture aetiology, prevalence, risk factors, fracture biomechanics, treatment, prognosis and prevention.
Collapse
Affiliation(s)
- Kristin Bowers
- Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, Tennessee, USA
| | - Joshua T Weinhandl
- Department of Kinesiology, Recreation, and Sport Studies, University of Tennessee, Knoxville, Tennessee, USA
| | - David E Anderson
- Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, Tennessee, USA
| |
Collapse
|
6
|
He H, Palm-Vlasak LS, Chen C, Banks SA, Biedrzycki AH. Quantification of equine stifle passive kinematics. Am J Vet Res 2023; 84:ajvr.22.10.0171. [PMID: 36576802 DOI: 10.2460/ajvr.22.10.0171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE This study aims to quantitatively characterize the passive kinematics of the healthy, soft tissue-intact equine stifle to establish an objective foundation for providing insights into the etiology of stifle disorders and developing a possible surgical treatment for stifle degenerative disease. ANIMALS 5 whole-horse specimens. PROCEDURES Reflective markers with intracortical bone pins and a motion capture system were used to investigate the stifle joint kinematics. Kinematics of 5 whole-horse specimens euthanized within 2 hours were calculated for internal/external rotation, adduction/abduction, and cranial/caudal translation of the medial and lateral femoral condyles and estimated joint contact centroids as functions of joint extension angle. RESULTS From 41.7° to 121.6° (mean ± SD, range of motion: 107.5° ± 7.2°) of joint extension, 13° ± 3.7° of tibial external rotation and 6° ± 2.7° of adduction were observed. The lateral femoral condyle demonstrated significantly greater cranial translation than the medial during extension (23.7 mm ± 9.3 mm vs. 14.3 mm ± 7.0 mm, P = .01). No significant difference was found between the cranial/caudal translation of estimated joint contact centroids in the medial and lateral compartment (13.3 mm ± 7.7 mm vs. 16.4 mm ± 5.8 mm, P = .16). CLINICAL RELEVANCE The findings share similarities with kinematics for human knees and sheep and dog stifles, suggesting it may be possible to translate what has been learned in human arthroplasty to treatment for equine stifles.
Collapse
Affiliation(s)
- Hongjia He
- Large Animal Veterinary Medicine, University of Florida, Gainesville, FL
| | | | - Cong Chen
- Orthopaedics and Sports Medicine, University of Florida, Gainesville, FL
| | - Scott A Banks
- Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL
| | - Adam H Biedrzycki
- Large Animal Veterinary Medicine, University of Florida, Gainesville, FL
| |
Collapse
|
7
|
Wright L, Hernlund E, Fjordbakk C, Ytrehus B, Law E, Uhlhorn M, Rhodin M. Patellar ligament desmopathy in the horse – a review and comparison to human patellar tendinopathy (‘Jumper’s knee’). COMPARATIVE EXERCISE PHYSIOLOGY 2022. [DOI: 10.3920/cep220011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Patellar ligament desmopathy in horses is regarded as an uncommon condition with unclear aetiology. Of the three patellar ligaments in the horse, the intermediate is the one most often diagnosed with desmopathy in horses presenting with chronic lameness. This structure corresponds to the patellar tendon in humans. As diagnostic imaging modalities continuously improve, changes in echogenicity of the patellar ligaments are identified ultrasonographically with increasing frequency. However, disruption of the normal fibre pattern may be present also in patellar ligaments in horses that show no signs of lameness. Similarly, there is a poor correlation between pain and diagnostic imaging findings in human patellar tendinopathy. Consequently, there appears to be a knowledge gap pertaining to normal ultrasonographic variation and diagnostic criteria for disease of the patellar ligaments in horses. Furthermore, local anaesthetic techniques to verify the diagnosis are poorly described, and due to the low number of treated cases, no specific treatment modality can be recommended on a scientific basis. The aim of this paper is to review the current knowledge regarding the pathogenesis, diagnosis and management of patellar ligament desmopathy in horses, compare this condition with patellar tendinopathy in humans, and identify areas for further research to increase the diagnostic accuracy in horses. We conclude that there is a profound need for better descriptions of ultrasonographic variation and pathological changes of the equine patellar ligaments. Identification of areas of maximal ligament strain and descriptions of early histopathological changes could render more information on the possible aetiology, preventive measurements and treatment options of desmopathy. Description of regional innervation could aid in development of methods for diagnostic anaesthesia to verify pain originating from the ligaments.
Collapse
Affiliation(s)
- L. Wright
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, P.O. Box 7011, 750 07 Uppsala, Sweden
| | - E. Hernlund
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, P.O. Box 7011, 750 07 Uppsala, Sweden
| | - C.T. Fjordbakk
- Department of Companion Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oluf Thesens vei 24, 1432 Ås, Norway
| | - B. Ytrehus
- Department of Biomedicine and Veterinary Public Health, Swedish University of Agricultural Sciences, P.O. Box 7028, 750 07 Uppsala, Sweden
| | - E. Law
- University Animal Hospital, P.O. Box 7040, 750 07 Uppsala, Sweden
| | - M. Uhlhorn
- University Animal Hospital, P.O. Box 7040, 750 07 Uppsala, Sweden
| | - M. Rhodin
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, P.O. Box 7011, 750 07 Uppsala, Sweden
| |
Collapse
|
8
|
Lemirre T, Santschi EM, Girard CA, Fogarty U, Janes JG, Richard H, Laverty S. Microstructural features of subchondral radiolucent lesions in the medial femoral condyle of juvenile Thoroughbreds: A microcomputed tomography and histological analysis. Equine Vet J 2021; 54:601-613. [PMID: 34117652 DOI: 10.1111/evj.13486] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 05/28/2021] [Accepted: 06/03/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND The aetiology of equine medial femoral condyle (MFC) subchondral bone radiolucencies (SR) is unknown. OBJECTIVES Characterise the microstructural structural features of MFC SR in juvenile Thoroughbreds with microcomputed tomography (μCT) and histology. STUDY DESIGN Cross-sectional post-mortem study. METHODS Distal femurs were collected at post-mortem. Conventional tomodensitometry was employed to scout for MFCs with and without SR lesions (SR+ and SR-, respectively). Group 1 were CT MFC SR+ and Group 2 age-matched SR- controls. Both underwent μCT and histological analysis. Group 3 CT MFC SR- foals, <6 months, were selected to search for chondronecrosis. Histological sections, processed from the lesion (Group 1) and a corresponding site in Groups 2 and 3, were assessed for chondronecrosis, fibrin, fibroplasia and osteochondral separation. Group 3 sections were surveyed for chondronecrosis alone. RESULTS A total of 178 femurs from 89 Thoroughbreds were harvested. Of these horses 19.1% (95% CI: 10.9%-27.3%) were CT MFC SR+ (17/23; 7.46 ± 4.36 months) and met the inclusion criteria for Group 1. Group 2 included 30 CT MFC SR- specimens (5.00 ± 2.73 months) and Group 3 had 44 CT MFC SR- s (2.68 ± 1.74 months). SR were located axially in foals <7 months of age, and centrally thereafter. All SRs had areas of thickened cartilage on histology and separation at the osteochondral junction containing fibrin (acute event) and fibroplasia (chronicity) in 73.9% (17/23; 95% CI: 56%-91.9%). In Group 1 specimens, chondronecrosis was present in 82.6% (19/23; 95% CI: 67.1%-98.1%) but four MFC SR+ had no evidence of chondronecrosis. Chondronecrosis was not detected in the Group 3 foal MFCs. MAIN LIMITATIONS No longitudinal follow-up. CONCLUSIONS The absence of chondronecrosis, pathognomic of osteochondrosis, in four MFC SR+s and in all of the CT MFC SR- foals suggests that osteochondrosis is not the cause, or the only cause, of these lesions and favours trauma as an alternate aetiological hypothesis.
Collapse
Affiliation(s)
- Thibeaut Lemirre
- Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC, Canada
| | | | - Christiane A Girard
- Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC, Canada
| | | | - Jennifer G Janes
- Department of Veterinary Science, University of Kentucky, Lexington, KY, USA
| | - Helene Richard
- Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC, Canada
| | - Sheila Laverty
- Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC, Canada
| |
Collapse
|
9
|
White JL, Salinas EY, Link JM, Hu JC, Athanasiou KA. Characterization of Adult and Neonatal Articular Cartilage From the Equine Stifle. J Equine Vet Sci 2021; 96:103294. [PMID: 33349403 DOI: 10.1016/j.jevs.2020.103294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 11/26/2022]
Abstract
A significant portion of equine lameness is localized to the stifle joint. Effective cartilage repair strategies are largely lacking, however, recent advances in surgical techniques, biomaterials, and cellular therapeutics have broadened the clinical strategies of cartilage repair. To date, no studies have been performed directly comparing neonatal and adult articular cartilage from the stifle across multiple sites. An understanding of the differences in properties between the therapeutic target cartilage (i.e., adult cartilage) as well as potential donor cartilage (i.e., neonatal cartilage) could aid in selection of optimal harvest sites within a donor joint as well as evaluation of the success of the grafted cells or tissues within the host. Given the dearth of characterization studies of the equine stifle joint, and in particular neonatal stifle cartilage, the goal of this study was to measure properties of both potential source tissue and host tissue. Articular cartilage of the distal femur and patella (P) was assessed in regards to two specific factors, age of the animal and specific site within the joint. Two age groups were considered: neonatal (<1 week) and adult (4-14 years). Cartilage samples were harvested from 17 sites across the distal femur and patella. It was hypothesized that properties would vary significantly between neonatal and adult horses as well as within age groups on a site-by-site basis. Adult thickness varied by site. With the exception of water content, there were no significant biochemical differences among sites within regions of the distal femur (condyles and trochlea) and the patella in either the adult or neonate. Neonatal cartilage had a significantly higher water content than adult. Surprisingly, biochemical measurements of cellularity did not differ significantly between neonatal and adult, however, adult cartilage had greater variance in cellularity than neonatal. Overall, there were no significant differences between neonatal and adult glycosaminoglycan content. Collagen per wet weight was found to be significantly higher in adult cartilage than neonatal when averaged across all levels. In terms of biomechanical properties, aggregate modulus varied significantly across the condyles of adult cartilage but not the neonate. Neonatal cartilage was significantly less permeable, and the Young's modulus of neonatal cartilage was significantly higher than the adult. The tensile strength did not vary in a statistically significant manner between age groups. An understanding of morphological, histological, biochemical, and biomechanical properties enhances the understanding of cartilage tissue physiology and structure-function relationships. This study revealed important differences in biomechanical and biochemical properties among the 17 sites and among the six joint regions, as well as age-related differences between neonatal and adult cartilage. These location and age-related variations are informative toward determining the donor tissue harvest site.
Collapse
Affiliation(s)
- Jamie L White
- Integrative Pathobiology Graduate Group, University of California, Davis, Davis, CA
| | - Evelia Y Salinas
- Henry Samueli School of Engineering, Department of Biomedical Engineering, University of California, Irvine, Irvine, CA
| | - Jarrett M Link
- Henry Samueli School of Engineering, Department of Biomedical Engineering, University of California, Irvine, Irvine, CA
| | - Jerry C Hu
- Henry Samueli School of Engineering, Department of Biomedical Engineering, University of California, Irvine, Irvine, CA
| | - Kyriacos A Athanasiou
- Henry Samueli School of Engineering, Department of Biomedical Engineering, University of California, Irvine, Irvine, CA.
| |
Collapse
|
10
|
Frazer LL, Santschi EM, Fischer KJ. Impact of a void in the equine medial femoral condyle on bone stresses and peak contact pressures in a finite element model. Vet Surg 2018; 48:237-246. [DOI: 10.1111/vsu.13139] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 09/30/2018] [Accepted: 11/03/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Lance L. Frazer
- Bioengineering Program, University of Kansas Lawrence Kansas
| | - Elizabeth M. Santschi
- Department of Clinical Sciences, Kansas State University College of Veterinary Medicine Manhattan Kansas
| | - Kenneth J. Fischer
- Department of Mechanical Engineering, University of Kansas Lawrence Kansas
| |
Collapse
|
11
|
Rubio-Martínez LM, Redding WR, Bladon B, Wilderjans H, Payne RJ, Tessier C, Geffroy O, Parker R, Bell C, Collingwood FA. Fracture of the medial intercondylar eminence of the tibia in horses treated by arthroscopic fragment removal (21 horses). Equine Vet J 2017; 50:60-64. [PMID: 28710893 PMCID: PMC5724496 DOI: 10.1111/evj.12720] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 07/09/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Fractures of the medial intercondylar eminence of the tibia (MICET) are scarcely reported in horses. OBJECTIVES To report the clinical and diagnostic findings, surgical treatment and outcome in a series of horses presented with MICET fracture and treated with arthroscopic fragment removal. STUDY DESIGN Multicentre retrospective case series. METHODS Case records of horses diagnosed with MICET fractures that had undergone surgical treatment were reviewed. Follow-up information was obtained from re-examination visits and/or owners. RESULTS Twenty-one cases were identified at 9 equine hospitals between 2004 and 2016. A history of trauma and acute onset of lameness was reported in 12 horses. All cases underwent fracture removal via arthroscopy of the medial femorotibial joint. The cranial cruciate ligament was intact in 6 horses and damaged in 15 horses (damage was ≤25% [n = 9], 25-50% [n = 4] or ≥50% [n = 2] of the cross-sectional area). The cranial ligament of the medial meniscus was damaged in 11 horses (≤25% [n = 8], 25-50% [n = 3]). The medial meniscus was damaged in 5 horses and articular cartilage damage was identified in 14 horses (mild [n = 8], moderate [n = 6]). Follow-up information (median 14 months; 4 months-6 years) was available for 20 cases; 2 horses were sound but convalescing; 13 horses were sound and returned to their previous or expected use. Of the 4 horses with the most severe changes to the articular soft tissue structures, 2 remained lame and 2 were subjected to euthanasia because of persistent lameness. MAIN LIMITATIONS The retrospective, multicentre nature of this study and the limited number of horses are the main limitations. CONCLUSIONS Fractures of the MICET are commonly associated with a traumatic event. Prompt diagnosis and early arthroscopic removal of the fracture are recommended.
Collapse
Affiliation(s)
- L M Rubio-Martínez
- Philip Leverhulme Equine Hospital, Institute of Veterinary Science, University of Liverpool, Neston, Wirral, UK
| | - W R Redding
- North Carolina State University, College of Veterinary Medicine, Raleigh, North Carolina, USA
| | - B Bladon
- Donnington Grove Veterinary Group, Newbury, Berkshire, UK
| | - H Wilderjans
- Dierenkliniek De Bosdreef, Moerbeke-Waas, Belgium
| | - R J Payne
- Rossdales Equine Hospital and Diagnostic Centre, Exning, Newmarket, Suffolk, UK
| | - C Tessier
- ONIRIS, Chirurgie et anesthésie, Nantes, France
| | - O Geffroy
- ONIRIS, Chirurgie et anesthésie, Nantes, France
| | - R Parker
- Liphook Equine Hospital, Liphook, Hampshire, UK
| | - C Bell
- Elders Equine Veterinary Service, Winnipeg, Manitoba, Canada
| | - F A Collingwood
- Philip Leverhulme Equine Hospital, Institute of Veterinary Science, University of Liverpool, Neston, Wirral, UK
| |
Collapse
|
12
|
Barton KI, Shekarforoush M, Heard BJ, Sevick JL, Vakil P, Atarod M, Martin R, Achari Y, Hart DA, Frank CB, Shrive NG. Use of pre-clinical surgically induced models to understand biomechanical and biological consequences of PTOA development. J Orthop Res 2017; 35:454-465. [PMID: 27256202 DOI: 10.1002/jor.23322] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/27/2016] [Indexed: 02/04/2023]
Abstract
Post-traumatic osteoarthritis (PTOA) development is often observed following traumatic knee injuries involving key stabilising structures such as the cruciate ligaments or the menisci. Both biomechanical and biological alterations that follow knee injuries have been implicated in PTOA development, although it has not been possible to differentiate clearly between the two causal factors. This review critically examines the outcomes from pre-clinical lapine and ovine injury models arising in the authors' laboratories and differing in severity of PTOA development and progression. Specifically, we focus on how varying severity of knee injuries influence the subsequent alterations in kinematics, kinetics, and biological outcomes. The immediate impact of injury on the lubrication capacity of the joint is examined in the context of its influence on biomechanical alterations, thus linking the biological changes to abnormal kinematics, leading to a focus on the potential areas for interventions to inhibit or prevent development of the disease. We believe that PTOA results from altered cartilage surface interactions where biological and biomechanical factors intersect, and mitigating acute joint inflammation may be critical to prolonging PTOA development. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:454-465, 2017.
Collapse
Affiliation(s)
- Kristen I Barton
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Mehdi Shekarforoush
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
| | - Bryan J Heard
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - John L Sevick
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
| | - Paria Vakil
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
| | - Mohammad Atarod
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
| | - Ryan Martin
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Section of Orthopaedics, University of Calgary, Foothills Hospital, Calgary, Alberta, Canada
| | - Yamini Achari
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - David A Hart
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Cyril B Frank
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Nigel G Shrive
- McCaig Institute for Bone & Joint Health, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Schulich School of Engineering, University of Calgary, Calgary, AB, Canada
| |
Collapse
|
13
|
Walker WT, Silverberg JL, Kawcak CE, Nelson BB, Fortier LA. Morphological characteristics of subchondral bone cysts in medial femoral condyles of adult horses as determined by computed tomography. Am J Vet Res 2016; 77:265-74. [DOI: 10.2460/ajvr.77.3.265] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|