Computational modelling of long bone fractures fixed with locking plates – How can the risk of implant failure be reduced?

Nassiri, Mujtaba; Donald, Bryan J. Mac; O’Byrne, J.

doi:10.1016/j.jor.2013.01.001

Cited by 38 publications

(35 citation statements)

References 16 publications

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“…18 Results are also consistent with a previous study which showed minimal effect of the fracture gap on construct stiffness in axial loading. 21 Increased working length resulted in decreasing the stiffness of fracture fixation and increasing interfragmentary movement, and this is consistent with previous studies. 9,18,19,29 The effect of working length on plate stress in axial loading is in agreement with the study of Stoffel et al .…”

Section: Discussionsupporting

confidence: 92%

“…Working length between screws was previously reported as an important parameter for affecting axial and torsional stiffness 19,21,29 and interfragmentary movement at the fracture gap. 18 Results are also consistent with a previous study which showed minimal effect of the fracture gap on construct stiffness in axial loading.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have described general principles of locking plates, 7,23,28,30 and experimental and numerical studies have investigated effects of individual parameters on fracture fixation. 18,19,21,22,29 However these studies have focused on particular aspects of fracture fixation, not with the goal of providing a comprehensive mathematical description of the interrelated factors involved.…”

Section: Introductionmentioning

confidence: 99%

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Finite Element-Derived Surrogate Models of Locked Plate Fracture Fixation Biomechanics

et al. 2016

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Internal fixation of bone fractures using plates and screws involves many choices-implant type, material, sizes, and geometric configuration-made by the surgeon. These decisions can be important for providing adequate stability to promote healing and prevent implant mechanical failure. The purpose of this study was to develop mathematical models of the relationships between fracture fixation construct parameters and resulting 3D biomechanics, based on parametric computer simulations. Finite element models of hundreds of different locked plate fixation constructs for midshaft diaphyseal fractures were systematically assembled using custom algorithms, and axial, torsional, and bending loadings were simulated. Multivariate regression was used to fit response surface polynomial equations relating fixation design parameters to outputs including maximum implant stresses, axial and shear strain at the fracture site, and construct stiffness. Surrogate models with as little as three regressors showed good fitting (R = 0.62-0.97). Inner working length was the strongest predictor of maximum plate and screw stresses, and a variety of quadratic and interaction terms influenced resulting biomechanics. The framework presented in this study can be applied to additional types of bone fractures to provide clinicians and implant designers with clinical insight, surgical optimization, and a comprehensive mathematical description of biomechanics.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite Element-Derived Surrogate Models of Locked Plate Fracture Fixation Biomechanics

et al. 2016

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“…A fracture gap of 1 mm was assumed [22]. The interfaces between the HA-BG plate and humerus bone were treated as unpenetrated interfaces, while the contact interaction between the plate and the bone was defined as having coefficient of friction 0.3 [23].…”

Section: Finite Element Analysismentioning

confidence: 99%

Appropriate Forming Conditions for Hydroxyapatite-Bioactive Glass Compact Scaffold

Wattanutchariya

Ruennareenard

Suttakul

2016

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Abstract. Biomaterials, such as Hydroxyapatite (HA) and Bioactive glass (BG) have been increasingly implemented in bone substitution due to their biocompatibility and close resemblance to the mineralized phase of human bone. Furthermore, biomaterials can be synthesized from natural sources with calcium-based skeletal structures. In this study, HA and BG were synthesized from bovine bone and mollusk shell, and mixed together to form HA-BG composite biomaterial. Then, the mixtures were compressed into a compact scaffold with dimension of 8×6×8 mm 3 , sintered at 1,000 ˚C for 3 hours and cooled down to room temperature. The compressive strengths of all specimens were evaluated using a universal testing machine. Experimental design was implemented to evaluate the significant factors of forming conditions on the mechanical property of the scaffold. The results revealed that all forming factors have a significant effect on the mechanical property of the composite scaffolds. Consequently, the highest compressive strength (136.92 MPa) was obtained from the scaffold with a 5.85 wt% of BG, 23.41 MPa of pressure and 65.64 seconds of holding time. In addition, Finite Element (FE) modeling was performed to simulate the HA-BG plate under combined loading, and showed that stresses were concentrated near the fracture site and the screw holes.

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“…Um dos mais importantes é o cálculo do comprimento da área de trabalho durante a fixação da fratura, definida pela distância entre os parafusos mais próximos ao foco da fratura proximal e distalmente. 10 Acredita-se que a tensão é mais baixa na placa quando a área de trabalho é pequena. 9 Idealmente, em uma fratura de traço simples transverso, espera-se que a mobilidade interfragmentar seja igualmente dividida entre o implante e o lado oposto do osso, quando uma carga é exercida de forma axial.…”

Section: Introductionunclassified

Observe a distância entre a linha de fratura e o comprimento da área de trabalho: análise bidimensional de elementos finitos em modelo de fixação extramedular

Giordano

Santos

Belangero

et al. 2018

Revista Brasileira de Ortopedia

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Como citar este artigo: Giordano V, et al. Observe a distância entre a linha de fratura e o comprimento da área de trabalho: análise bidimensional de elementos finitos em modelo de fixação extramedular. Rev Bras Ortop. 2017. http://dx.. of Pages 6 r e v b r a s o r t o p . 2 0 1 7;x x x(x x):xxx-xxx SOCIEDADE BRASILEIRA DE ORTOPEDIA E TRAUMATOLOGIA w w w . r b o . o r g . b r Artigo OriginalObserve a distância entre a linha de fratura e o comprimento da área de trabalho: análise bidimensional de elementos finitos em modelo de fixação extramedular ଝ

show abstract

Computational modelling of long bone fractures fixed with locking plates – How can the risk of implant failure be reduced?

Cited by 38 publications

References 16 publications

Finite Element-Derived Surrogate Models of Locked Plate Fracture Fixation Biomechanics

Finite Element-Derived Surrogate Models of Locked Plate Fracture Fixation Biomechanics

Appropriate Forming Conditions for Hydroxyapatite-Bioactive Glass Compact Scaffold

Observe a distância entre a linha de fratura e o comprimento da área de trabalho: análise bidimensional de elementos finitos em modelo de fixação extramedular

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