Mechanical properties of femoral trabecular bone in dogs

Pressel, Thomas; Bouguecha, Anas; Vogt, Ute; Meyer‐Lindenberg, Andrea; Behrens, Bernd‐Arno; Nolte, Ingo; Windhagen, Henning

doi:10.1186/1475-925x-4-17

Cited by 21 publications

(4 citation statements)

References 29 publications

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“…Similar to ours, the study modeled bone and ligament properties for the canine pelvis based on the human literature. The study also included assumptions based on previously published tissue properties of canine long bones (41). Ligament placements were based on a veterinary textbook (11).…”

Section: Part 1: Comparisons Between Numbers Of Sij Ct Lesions/dog Anmentioning

confidence: 99%

Computed Tomographic Evaluation of the Sacroiliac Joints of Young Working Labrador Retrievers of Various Work Status Groups: Detected Lesions Vary Among the Different Groups and Finite Element Analyses of the Static Pelvis Yields Repeatable Measures of Sacroiliac Ligament Joint Strain

Carnevale

Jones

et al. 2020

Front. Vet. Sci.

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Musculoskeletal injuries can lead to a working dog being withdrawn from service prior to retirement. During training exercises, young working dogs are often required to perform repetitive tasks, including adoption of an upright posture (or "hupp" task). Non-invasive, quantitative methods would be helpful for supporting research on effects of these repetitive tasks on sacroiliac joints (SIJ). Furthering our understanding of lesions in and biomechanical stresses on the SIJ could provide insight into possible training modifications for minimizing risks of SIJ injury. Aims of this retrospective, secondary analysis, exploratory study were to test hypotheses that (1) mean numbers of SIJ computed tomographic (CT) lesions/dog would differ among work status groups in young working Labrador Retrievers; (2) a methodology for using CT data and finite element analysis (FEA) to quantify SIJ ligament strain in the static canine pelvis would be feasible; and (3) this FEA methodology would yield repeatable measures of SIJ ligament strain. Clinical and CT data for 22 Labrador retriever working dogs, aged 11-48 months, were retrospectively reviewed. Dogs were categorized into three work status groups (Breeder, Detection, Other). A veterinary radiologist who was unaware of dog group status recorded numbers of CT lesions for each SIJ, based on previously published criteria. Mean numbers of SIJ CT lesions/dog were compared among dog work status groups. An a priori FEA model was created from the CT images of one of the dogs using image analysis software packages. Using tissue properties previously published for the human pelvis, various directional loads (n = 8) and forces (48 ligament strain values) were placed

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Section: Part 1: Comparisons Between Numbers Of Sij Ct Lesions/dog Anmentioning

confidence: 99%

Computed Tomographic Evaluation of the Sacroiliac Joints of Young Working Labrador Retrievers of Various Work Status Groups: Detected Lesions Vary Among the Different Groups and Finite Element Analyses of the Static Pelvis Yields Repeatable Measures of Sacroiliac Ligament Joint Strain

Carnevale

Jones

et al. 2020

Front. Vet. Sci.

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“…The material properties of the implant were taken from three-point bending test. Worst case was assumed, and material property values were taken as lower than the trabecular and cortical bone values in the literature, and calculations were made (Table 1 ) 17 , 18 .…”

Section: Methodsmentioning

confidence: 99%

A new patient-specific overformed anatomical implant design method to reconstruct dysplastic femur trochlea

Öztürk

Ayazoğlu

Öztürk

et al. 2023

Sci Rep

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Patellar luxation with condylar defect is a challenging situation for reconstruction in humans. Patella reluxation, cartilage damage and pain are the most common complications. This study aims to present a new patient specific method of overformed implant design and clinical implantation that prevents luxation of patella without damaging the cartilage in a dog. Design processes are Computer Tomography, Computer Assisted Design, rapid prototyping of the bone replica, creation of the implant with surgeon’s haptic knowledge on the bone replica, 3D printing of the implant and clinical application. The implant was fully seated on the bone. Patella reluxation or implant-related bone problem was not observed 80 days after the operation. However, before the implant application, there were soft tissue problems due to previous surgeries. Three-point bending test and finite element analysis were performed to determine the biomechanical safety of the implant. The stress acting on the implant was below the biomechanical limits of the implant. More cases with long-term follow-up are needed to confirm the success of this method in patellar luxation. Compared with trochlear sulcoplasty and total knee replacement, there was no cartilage damage done by surgeons with this method, and the implant keeps the patella functionally in sulcus. This is a promising multidisciplinary method that can be applied to any part of the bone and can solve some orthopaedic problems with surgeon’s haptic knowledge.

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“…Regarding the elastic modulus and degree of anisotropy in canine bone, no significant differences were investigated in X, Y and Z directions, suggesting an effective isotropy. 23 Therefore, an isotropic elasticity of 10.5 GPa and a Poisson ratio of 0.3 were allocated to the bone. The friction coefficient ( μ fc ) between the implant and the bone was set at μ fc = 0.001 24 and between bone to bone was set at μ fc = 0.0053.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of EBM manufactured bespoke implants: A probabilistic study

Gupta

Millward

Lewis

2021

Proc Inst Mech Eng H

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This study analyses three additively manufactured canine implants designed for angular limb deformity correction procedure through probabilistic numerical analysis. These implants have produced excellent results in-vivo and are operational to-date. Therefore, this study uses finite element analysis in conjunction with statistical analysis in order to further validate these implants from a numerical perspective. Due to uncertainties associated with boundary conditions for a bespoke implant geometry, the analyses in this study were conducted on a range of input values. An interrogation of these parameters through sensitivity analysis enabled in identifying the vital inputs. These inputs were then employed to conduct robustness analysis in order to determine the mean value of stress on which these implants ideally operate. These mean values were then compared with the associated safety and failure limit to obtain the probability of reaching these limits through different reliability techniques. A low probability of failure computed from numerical analysis in combination with the continued performance of these implants, suggests a successful integration of the methodology in the design phase of bespoke implants.

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Mechanical properties of femoral trabecular bone in dogs

Cited by 21 publications

References 29 publications

Computed Tomographic Evaluation of the Sacroiliac Joints of Young Working Labrador Retrievers of Various Work Status Groups: Detected Lesions Vary Among the Different Groups and Finite Element Analyses of the Static Pelvis Yields Repeatable Measures of Sacroiliac Ligament Joint Strain

Computed Tomographic Evaluation of the Sacroiliac Joints of Young Working Labrador Retrievers of Various Work Status Groups: Detected Lesions Vary Among the Different Groups and Finite Element Analyses of the Static Pelvis Yields Repeatable Measures of Sacroiliac Ligament Joint Strain

A new patient-specific overformed anatomical implant design method to reconstruct dysplastic femur trochlea

Finite element analysis of EBM manufactured bespoke implants: A probabilistic study

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