Finite element analysis of a novel pin-sleeve system for external fixation of distal limb fractures in horses

Brianza, Stefano; Brighenti, Vittoria; Lansdowne, Jennifer L.; Schwieger, Karsten; Bouré, Ludovic

doi:10.1016/j.tvjl.2010.10.026

Cited by 17 publications

(10 citation statements)

References 22 publications

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“…A Poisson ratio of 0.3 was used in all instances. 12,13 Three-dimensional models of HDCP and CLP designs as well as unthreaded 2.7-and 3.5-mm cortical screws were built from computer-aided design files and imported into a computational software program. k Plate and screw models were meshed with 4-node linear tetrahedral elements (C3D4) up to a global mesh size between 0.5 and 0.8 mm with linear elastic behavior, with a Young modulus of 186 GPa and a Poisson ratio of 0.3.…”

Section: Methodsmentioning

confidence: 99%

“…k Plate and screw models were meshed with 4-node linear tetrahedral elements (C3D4) up to a global mesh size between 0.5 and 0.8 mm with linear elastic behavior, with a Young modulus of 186 GPa and a Poisson ratio of 0.3. 12,13 Each implant model was positioned on an identical copy of the 3-D reconstruction of the right forelimb according to the position determined from the radiographic projections. l Instrumentation with either implant system was realized with Boolean operations.…”

Section: Methodsmentioning

confidence: 99%

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Biomechanical and computational evaluation of two loading transfer concepts for pancarpal arthrodesis in dogs

Rothstock

Kowaleski²,

Boudrieau³

et al. 2012

ajvr

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Biomechanical and computational evaluation of two loading transfer concepts for pancarpal arthrodesis in dogs

Rothstock

Kowaleski²,

Boudrieau³

et al. 2012

ajvr

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“…Adaptive remeshing was performed to refine the mesh for each model based upon the output variable von Table 1 Material properties of bone and metals used for FE modelling of transfixation pin combinations within the equine third metacarpal bone [25][26][27][28] Density (g/cm 3 Mises (VM) stress. 29 Remeshing was continued until the maximum change in VM stress from one mesh to the next fell below 2%, resulting in a stable mesh for analysis. The cast was not modelled and pin to cast attachment was restrained in all three axes as a boundary condition.…”

Section: Finite Element Model Constructionmentioning

confidence: 99%

Finite Element Analysis of Six Transcortical Pin Parameters and Their Effect on Bone–Pin Interface Stresses in the Equine Third Metacarpal Bone

Lescun

Adams

Main

et al. 2019

Vet Comp Orthop Traumatol

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Objective The objectives of this study were to validate a finite element model of the equine distal limb transfixation cast and to determine the effect of six transcortical pin parameters on bone–pin interface (BPI) stresses in the third metacarpal bone. Study Design A transfixation cast finite element model was developed from a computed tomography scan of the third metacarpal bone and modelled pin elements. The model was validated by comparing strain measured around a 6.3-mm transfixation pin in the third metacarpal bone with the finite element model. The pin parameters of diameter, number, location, spacing, orientation and material were evaluated by comparing a variety of pin configurations within the model. Results Pin diameter and number had the greatest impact on BPI stress. Increasing the diameter and number of pins resulted in lower BPI stresses. Diaphyseal pin location and stainless-steel pins had lower BPI stresses than metaphyseal location and titanium alloy pins, respectively. Offset pin orientation and pin spacing had minimal impact on BPI stresses during axial loading. Conclusion The results provide evidence that diameter and number are the main pin parameters affecting BPI stress in an equine distal limb transfixation cast. Configurations of various pin size and number may be proposed to reduce BPI stresses and minimize the risk of pin related complications. Further refinement of these models will be required to optimize pin configurations to account for pin hole size and its impact on overall bone strength.

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“…The multifactorial nature of pain makes identifying the etiology challenging. Some authors have theorized that excessive strain within bone may stimulate nociceptor activity and cause pain 3, 4. Simpson et al4 correlated a typically painful region on the tibia, identified in patients after UKR, with increased von Mises strain (VMS) using finite element (FE) analysis.…”

mentioning

confidence: 99%

Evaluation of factors affecting tibial bone strain after unicompartmental knee replacement

Pegg

Walter

Mellon

et al. 2012

Journal Orthopaedic Research

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Persistent pain is an important cause of patient dissatisfaction after unicompartmental knee replacement (UKR) and has been correlated with localised tibial strain. However, the factors that influence these strains are not well understood. To address this issue, we created finite element models to examine the effect on tibial strain of: (1) muscle forces (estimated using instrumented knee data) acting on attachment sites on the proximal tibia, (2) UKR implantation, (3) loading position, and (4) changes in gait pattern. Muscle forces acting on the tibia had no significant influence on strains within the periprosthetic region, but UKR implantation increased strain by 20%. Strain also significantly increased if the region of load application was moved >3 mm medially. The strain within the periprosthetic region was found to be dependent on gait pattern and was influenced by both medial and lateral loads, with the medial load having a greater effect (regression coefficients: medial=0.74, lateral=0.30). These findings suggest that tibial strain is increased after UKR and may be a cause of pain. It may be possible to reduce pain through modification of surgical factors or through altered gait patterns.

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Finite element analysis of a novel pin-sleeve system for external fixation of distal limb fractures in horses

Cited by 17 publications

References 22 publications

Biomechanical and computational evaluation of two loading transfer concepts for pancarpal arthrodesis in dogs

Biomechanical and computational evaluation of two loading transfer concepts for pancarpal arthrodesis in dogs

Finite Element Analysis of Six Transcortical Pin Parameters and Their Effect on Bone–Pin Interface Stresses in the Equine Third Metacarpal Bone

Evaluation of factors affecting tibial bone strain after unicompartmental knee replacement

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