Statically equivalent load and support conditions produce different hip joint contact pressures and periacetabular strains

Bay, Brian K.; Hamel, Andrew J.; Olson, Steve A.; Sharkey, Neil A.

doi:10.1016/s0021-9290(96)00120-0

Cited by 57 publications

(35 citation statements)

References 18 publications

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“…Other aspects of intertrochanteric fracture patterns, such as the integrity of the lateral cortex and reverse obliquity of the fracture line, also contribute to fracture instability. 7,8,18,30 However, in the absence of these features, stability of 31-A2 fractures is difficult to define, causing these fractures to be commonly analyzed as one group. 20-23 Jacobs et al, 25 in a laboratory study, showed that weight-bearing strain is shared between implant and bone.…”

Section: Discussionmentioning

confidence: 99%

“…The loading conditions used in this study were designed to simulate only the single leg stance phase of gate, simulating the maximal hip loading conditions that occur physiologically. 30 A matched pair test design was employed, so any loading artifacts would be present in equal measure in both treatment groups.…”

Section: Discussionmentioning

confidence: 99%

“…[28][29][30][31] One uniaxial strain gauge (SGD-1.5/120, Omega Engineering, Inc) was mounted on the thinnest anterior aspect of the nail or lateral aspect of the side plate, 1 mm distal to the nail/ blade or plate/screw junction. Positioning of the strain gauge was based on the expected zone of the highest von Mises stress on the implant.…”

Section: Implant Instrumentation With Strain Gaugesmentioning

confidence: 99%

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The Effect of Fracture Pattern Stability on Implant Loading in OTA Type 31-A2 Proximal Femur Fractures

Marmor

Liddle

Pekmezci

et al. 2013

Journal of Orthopaedic Trauma

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Implant Instrumentation With Strain Gaugesmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Fracture Pattern Stability on Implant Loading in OTA Type 31-A2 Proximal Femur Fractures

Marmor

Liddle

Pekmezci

et al. 2013

Journal of Orthopaedic Trauma

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show abstract

“…3). As shown in previous biomechanical studies [5][6][7][8][9], the 158 angle between the shaft of the femur and vertical axis on the coronal plane simulates physiological loading of the proximal femur in the one-legged stance phase of gait.…”

Section: Loading Experimentsmentioning

confidence: 99%

Finite element analysis of the effect of cannulated screw placement and drilling frequency on femoral neck fracture fixation

Mei¹,

Liu²,

Jia³

et al. 2014

Injury

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“…Pressure film is an effective tool for quasi-static loading of the hip joint [1, 3,16,17,22,33]. It was not designed, however, to capture the dynamic behavior of actual lateral impact events, with times to peak force less than 30ms in experiments [8,32] and in simulated falls [20,26].…”

Section: Discussionmentioning

confidence: 99%

Contact pressures in the flexed hip joint during lateral trochanteric loading

Sparks

Beason

Etheridge

et al. 2005

Journal Orthopaedic Research

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Acetabular fractures are an especially problematic outcome of motor vehicle side impacts. While fracture type has been correlated with impact direction and femoral orientation, actual contact pressures in the hip joint have not been quantified for lateral loading conditions. In the present study, we used pressure sensitive film to measure contact areas and pressures in seven hip joints from four cadavers under quasi-static lateral loading through the greater trochanter. The aim was to quantify the interactions of the femoral head with the acetabulum associated with variations in femoral orientation. Three angles of hip flexion (80°, 90°, 100") and hip abduction (-loo, 0", 10') were tested, producing nine test orientations for each joint. We observed that contact areas, pressures, and forces varied significantly with femoral orientation for the adducted hip. The principal locations of load transmission were in the anterior and posterior regions of the acetabulum. For the abducted femur, contact pressures were concentrated anteriorly, and with increased adduction, anterior contact pressures diminished while posterior and superior pressures increased. The movement of pressure sites was consistent with mechanisms of acetabular fractures described by Letournel and Judet and provides new data for validation of finite element models of the pelvis in side impact.

show abstract

Statically equivalent load and support conditions produce different hip joint contact pressures and periacetabular strains

Cited by 57 publications

References 18 publications

The Effect of Fracture Pattern Stability on Implant Loading in OTA Type 31-A2 Proximal Femur Fractures

The Effect of Fracture Pattern Stability on Implant Loading in OTA Type 31-A2 Proximal Femur Fractures

Finite element analysis of the effect of cannulated screw placement and drilling frequency on femoral neck fracture fixation

Contact pressures in the flexed hip joint during lateral trochanteric loading

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