Injury Tolerance Criteria for Short-Duration Axial Impulse Loading of the Isolated Tibia

Quenneville, Cheryl E.; McLachlin, Stewart D.; Greeley, Gillian S.; Dunning, Cynthia E.

doi:10.1097/ta.0b013e3181f6bb0e

Cited by 21 publications

(9 citation statements)

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“…The accuracy of the models depends greatly on the input data and the assumptions made. The preprocessing and material properties of this study were based on the research methods used by Quenneville et al (). In the reported methods, a 3D FE model of the human tibia was performed to analyze the short‐duration high‐force axial impact loading.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, when a person weighing 66 kg is walking, the load formula is computed to be F = 66 kg × 9.8 N/kg × 85.6％×3 = 1,661 N, which met the peak range (1,487–1,718 N) of the tibia platform axial load on the walking condition (Taylor, Walker, Perry, & Cannon, ). The axial force is the primary point of evaluating the response of the model, as it has previously been established as an indicator of injury risk (Quenneville & Dunning, ; Quenneville, McLachlin, Greeley, & Dunning, ). Thus, the axial load was found to be 990 N and 660 N for the medial and lateral tibia platforms, respectively, because the ratio of medial and lateral platform load is 60%:40% (Hogel et al, ) (Figure e).…”

Section: Methodsmentioning

confidence: 99%

“…When the number of elements exceeded the critical value, the corresponding locations were considered as the failure region in the experimental specimen (Quenneville & Dunning, ). This criterion is recommended to be used in combination with force limits (Quenneville et al, ) as an injury risk indicator. The yield stress of cortical bone of tibia was reported to be 120–129 MPa (Burstein et al, ; Untaroiu, Darvish, Crandall, Deng, & Wang, ), thus we used the yield stress of 125 MPa reported in the literature (Burstein et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…Hence, when a person weighing 66 kg is walking, the load formula is computed to be F 5 66 kg 3 9.8 N/kg 3 85.6％33 5 1,661 N, which met the peak range (1,487-1,718 N) of the tibia platform axial load on the walking condition (Taylor, Walker, Perry, & Cannon, 1998). The axial force is the primary point of evaluating the response of the model, as it has previously been established as an indicator of injury risk Quenneville, McLachlin, Greeley, & Dunning, 2011).…”

Section: Load Setting and Meshingmentioning

confidence: 99%

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Assessment of fracture risk in proximal tibia with tumorous bone defects by a finite element method

Lin

Zhu

et al. 2017

Microsc Res Tech

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There has not been a satisfying method to predict the fracture risk in tumorous bone lesions. To tackle this challenge, we used a finite element method to assess the fracture risk in the proximal tibia (pT) when the size and location of the tumorous defects are varied in bone. Towards this end, the circular cortical defects, mimicking the tumorous lesions by forming cortical window defects, with a diameter (Ф) of 20, 30, 40, or 50 mm, are structured on the anteromedial, lateral, posterior wall of pT, which is located 5, 15, and 25 mm below articular margin, respectively. We found that under walking conditions, the Von Mises Stress of each defective tibia model was larger than that of the intact tibia model and also showed a positive linear correlation with the sizes of the defects. A notable fracture risk was not observed until the defect was Ф30 mm or larger. When the defect emerged, the anteromedial wall resisted fracture risk more than the rest of wall. Our results show that the size and location of the bone tumors are important factors affecting the fracture risk of pT. Our findings will be beneficial to clinicians when deciding what treatment to use for pT lesions.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Load Setting and Meshingmentioning

confidence: 99%

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Assessment of fracture risk in proximal tibia with tumorous bone defects by a finite element method

Lin

Zhu

et al. 2017

Microsc Res Tech

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“…While this approach was used successfully for the tibia, 32 this is the first time it has been applied to simulate impacts to the distal radius that are consistent with forward fall arrest. The significant mean velocity and energy differences between the impact events (pre-fracture, crack, and fracture), and the relatively small variability (coefficients of variation) within these measures, suggest that this is an effective, reliable method for applying impacts to the distal upper extremity.…”

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confidence: 99%

Failure characteristics of the isolated distal radius in response to dynamic impact loading

Burkhart

Andrews

Dunning

2011

Journal Orthopaedic Research

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We examined the mechanical response of the distal radius pre-fracture and at fracture under dynamic impact loads. The distal third of eight human cadaveric radii were potted and placed in a custom designed pneumatic impact system. The distal intraarticular surface of the radius rested against a model scaphoid and lunate, simulating 458 of wrist extension. The scaphoid and lunate were attached to a load cell that in turn was attached to an impact plate. Impulsive impacts were applied at increasing energy levels, in 10 J increments, until fracture occurred. Three 458 stacked strain gauge rosettes were affixed along the length of the radius quantifying the bone strains. The mean (SD) fracture energy was 45.5 (16) J. The mean (SD) resultant impact reaction force (IRFr) at failure was 2,142 (1,229) N, resulting in high compressive strains at the distal (2,718 (1,698) me) and proximal radius (3,664 (1,890) me). We successfully reproduced consistent fracture patterns in response to dynamic loads. The fracture energy and forces reported here are lower and the strains are higher than those previously reported and can likely be attributed to the controlled, incremental, dynamic nature of the applied loads. Keywords: radius; impact; fracture; forward fall; injury criteriaThe distal radius is a common fracture site, often resulting from a forward fall. Nevitt and Cummings 1 reported that, of 337 forward falls, 39% resulted in a wrist fracture, with more than 60% requiring some form of surgical intervention. 2,3 This has lead to these injuries being identified as a major health problem, 4 and the World Health Organization has listed fracture prevention among healthcare priorities. 5 Nonetheless, fracture frequency remains high ($164,000 emergency room visits/year from 1991 to 2009 in the US alone 6 ), and researchers have been unable to determine optimal treatment strategies for various patterns and severities of wrist fractures. 7 Although general consensus exists regarding risk factors for distal radius fractures, 8 prevention of these injuries requires a more thorough understanding of the injury mechanisms. The injury mechanism is one of the most important elements of the history, 7 as this information can help discern the degree of damage to the bone and the surrounding soft tissues. Beardley et al. 9 identified the importance of understanding the energy involved in a fracture as it generally determines the degree of comminution, thus affecting the treatment protocol.An accurate understanding of the injury mechanisms (e.g., kinetic energy involved and direction of loading) can be accomplished by improving our knowledge of the input parameters and the bones' response to dynamic loading through valid laboratory studies. 10 Many researchers mechanically loaded human cadaver specimens to determine the maximal strength of the distal radius, 10-22 but methodological inconsistencies have led to variability in results. Researchers studied the response to dynamic impact loads 10,[17][18][19] to better simulate real-worl...

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Injury Potential of Shock Induced Compressive Waves on Human Bone

Bailey

Boruah

Christopher

et al. 2012

Dynamic Behavior of Materials, Volume 1

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Injury Tolerance Criteria for Short-Duration Axial Impulse Loading of the Isolated Tibia

Abstract: These results suggest that the current injury standard may be too conservative for the tibia during high-speed impacts such as in-vehicle land mine blasts and that factors in addition to force should be taken into consideration.

Cited by 21 publications

References 5 publications

Assessment of fracture risk in proximal tibia with tumorous bone defects by a finite element method

Assessment of fracture risk in proximal tibia with tumorous bone defects by a finite element method

Failure characteristics of the isolated distal radius in response to dynamic impact loading

Injury Potential of Shock Induced Compressive Waves on Human Bone

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