Structural properties of fourth-generation composite femurs and tibias

Heiner, Anneliese D.

doi:10.1016/j.jbiomech.2008.08.013

Cited by 276 publications

(207 citation statements)

References 14 publications

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“…Second, we chose to use a synthetic tissue surrogate. Although cadaveric tissue testing may be considered the gold standard in producing results with the highest level of clinical translation and acceptance, prior studies have validated the surrogates against human tissue from a mechanical perspective [3,4,6,7,16,17]. The use of synthetic specimens also eliminates bone quality and heterogeneous geometry as confounding factors, which we considered to be an important a priori consideration to adequately interrogate biomechanical differences between the methods of fixation.…”

Section: Discussionmentioning

confidence: 99%

“…A synthetic tissue surrogate was chosen because of standardized geometry, homogeneous material properties, and prior laboratory work that has validated the surrogates against cadaveric human bone with comparative results for axial, torsional, and four-point bending stiffness as well as failure mechanism and failure load under different loading conditions [3,4,6,7,16,17]. Additionally, the use of a tissue surrogate eliminates potentially confounding variables associated with fresh-frozen cadaveric tissue, including bone quality and anatomic heterogeneity, which may affect biomechanical results and their interpretation.…”

Section: Specimensmentioning

confidence: 99%

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Are Quadrilateral Surface Buttress Plates Comparable to Traditional Forms of Transverse Acetabular Fracture Fixation?

Kistler

Smithson

Cooper

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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Section: Discussionmentioning

confidence: 99%

Section: Specimensmentioning

confidence: 99%

Are Quadrilateral Surface Buttress Plates Comparable to Traditional Forms of Transverse Acetabular Fracture Fixation?

Kistler

Smithson

Cooper

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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“…The synthetic scapulae we used provided a more homogenous test bed than cadaveric specimens, and they are more anatomically relevant than foam blocks as used in previous studies [8,23,33]. Although fatigue testing is not defined for this model, this substrate (fourthgeneration composite bones) has been shown to have similar biomechanical properties to human bone [20,41,42] and has been used by others for glenoid prosthesis testing [34]. Despite their homogeneity, the methods used to manufacture the synthetic scapulae result in circularshaped weak zones in the cortical shell.…”

Section: Discussionmentioning

confidence: 99%

Posterior Glenoid Wear in Total Shoulder Arthroplasty: Eccentric Anterior Reaming Is Superior to Posterior Augment

Wang

Abrams

Behn

et al. 2015

Clinical Orthopaedics &Amp; Related Research

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Background Uncorrected glenoid retroversion during total shoulder arthroplasty may lead to an increased likelihood of glenoid prosthetic loosening. Augmented glenoid components seek to correct retroversion to address posterior glenoid bone loss, but few biomechanical studies have evaluated their performance. Questions/purposes We compared the use of augmented glenoid components with eccentric reaming with standard glenoid components in a posterior glenoid wear model. The primary outcome for biomechanical stability in this model was assessed by (1) implant edge displacement in superior and inferior edge loading at intervals up to 100,000 cycles, with secondary outcomes including (2) implant edge load during superior and inferior translation at intervals up to 100,000 cycles, and (3) incidence of glenoid fracture during implant preparation and after cyclic loading. Methods A 12°-posterior glenoid defect was created in 12 composite scapulae, and the specimens were divided in two equal groups. In the posterior augment group, glenoid version was corrected to 8°and an 8°-augmented polyethylene glenoid component was placed. In the eccentric reaming group, anterior glenoid reaming was performed to neutral version and a standard polyethylene glenoid component was placed. Specimens were cyclically loaded in the superoinferior direction to 100,000 cycles. Superior and inferior glenoid edge displacements were recorded. Results Surviving specimens in the posterior augment group showed greater displacement than the eccentric reaming group of superior (1.01 ± 0.02 [95% CI, 0.89-1.13] versus 0. 83 ± 0.10 [95% CI,

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“…The bone geometry is based on a 183-cm, 90-kg male and the mechanical properties simulate those of healthy adult bones of less than 80 years of age [24]. However, it has been proven that the failure modes and typical fracture patterns are close to the ones published for human bones [24,25]. Fixation in osteoporotic patients will most likely fail at lower values.…”

Section: Discussionmentioning

confidence: 99%

A new angle stable nailing concept for the treatment of distal tibia fractures

Kühn

Appelmann

Pairon

et al. 2014

International Orthopaedics (SICOT)

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Purpose Surgical treatment of distal tibial fractures demands a stable fracture fixation while minimizing the irritation to the soft tissues by approach and implant. Biomechanical studies have demonstrated superior performance for angular-stable locked nails over standard locked nails in distal tibial fractures. The experimental Retrograde Tibial Nail (RTN) is a minimally invasive local intramedullary osteosynthesis, which has been under design by our group. We conducted a biomechanical comparison in composite tibiae of the Retrograde Tibial Nail against the Expert Tibial Nail (Synthes®). Our hypothesis was that the RTN would provide equivalent biomechanical stability with respect to extra-axial compression, torsion and load to failure testing, in an extra-articular distal tibia fracture model. Methods Biomechanical composite bone testing was conducted in 14 biomechanical composite tibiae in an AO 43 A3 fracture model. In both groups, triple angle stable interlocking was performed in the distal fragment. Results Results show a statistically non-significant higher stability of the ETN during the axial loading tests. Torsional stability testing resulted in a statistically superior performance for the RTN (p=0.018).Destructive extra-axial compression resulted in failure of six ETN constructs, while all RTN specimens survived the maximal load. Conclusions The experimental Retrograde Tibial Nail provides the key features for the treatment of distal tibial fractures. It combines a minimally invasive local intramedullary osteosynthesis with the ability to securely fix the fracture by multiple angle stable locking options.

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Structural properties of fourth-generation composite femurs and tibias

Cited by 276 publications

References 14 publications

Are Quadrilateral Surface Buttress Plates Comparable to Traditional Forms of Transverse Acetabular Fracture Fixation?

Are Quadrilateral Surface Buttress Plates Comparable to Traditional Forms of Transverse Acetabular Fracture Fixation?

Posterior Glenoid Wear in Total Shoulder Arthroplasty: Eccentric Anterior Reaming Is Superior to Posterior Augment

A new angle stable nailing concept for the treatment of distal tibia fractures

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