Experimental Measurement of Maximum Torque Capacity of Long Bones

Strömberg, Lennart; Dalén, Nils

doi:10.3109/17453677608991987

Cited by 46 publications

(21 citation statements)

References 9 publications

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“…Spiral fractures are the commonest type, so torsional testing was selected to evaluate the stability of the fixation. Mechanical testing of pairs of long bones allows individual variance to be excluded and long bones on the right and left sides have been reported as having similar mechanical properties [22], which we confirmed in our study. There was no difference in the osteoporotic state or mechanical properties of the paired bones.…”

Section: Discussionsupporting

confidence: 79%

The use of a resorbable augmentation device to secure plating of osteoporotic bones

Mainil‐Varlet

Cordey

Landolt

et al. 1997

International Orthopaedics

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Section: Discussionsupporting

confidence: 79%

The use of a resorbable augmentation device to secure plating of osteoporotic bones

Mainil‐Varlet

Cordey

Landolt

et al. 1997

International Orthopaedics

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“…Testing was performed at a twist rate of 88/s. 50 Right-sided femurs were twisted with external rotation while left-sided specimens were twisted with internal rotation. Twist direction should have no effect on the results as torsional strength and stiffness are independent of twist direction.…”

Section: Physical Torsional Strength Measurementmentioning

confidence: 99%

Torsional strength estimates of femoral diaphyses with endosteal lytic lesions: Dual‐energy x‐ray absorptiometry study

Robertson

Beck

Chan

et al. 2007

Journal Orthopaedic Research

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Pathologic fracture is a significant problem for individuals with metastatic bone disease. Current guidelines for prophylactic internal fixation are neither reliable nor easily applied. The purpose of this study was to validate dual-energy X-ray absorptiometry (DXA) as an accurate method for estimating torsional bone strength of diaphyseal bone with endosteal lytic lesions. Endosteal lesions of varying sizes were simulated in the diaphyses of 12 adult cadaveric femurs. Unaltered contralateral femurs served as matched controls. Machined lesions ranged from 3 to 6.5 cm in length, 1 to 3 cm in width, 15 to 48 cm 2 in elliptical area, with 10% to 100% removal of the cortical thickness. Morphology and density data obtained from DXA images were used to estimate torsional strength. All femora were mechanically tested to failure in torsion. Physically measured torsional strength was not significantly correlated to lesion elliptical area (r ¼ 0.542, p > 0.05) or percentage cortical thickness removed (r ¼ 0.257, p > 0.05). Measured torsional strength was significantly correlated to DXA-based torsional strength estimates (r ¼ 0.855, p < 0.01). Lesion size alone did not correlate with the strength of bones with simulated endosteal lytic lesions. In contrast, calculations based on DXA (morphology, density) did correlate with torsional strength. This is the first step in the development of a DXA-based tool for objectively estimating bone strength in the presence of endosteal lytic lesions. ß

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“…Within a single species, differences in mechanical properties have been reported between t h e right and left paired bones (Puhl e t al. 1972, White et al 1974, Stromberg & Dalen 1976b. During the course of studies on the healing of experimental fractures (Paavolainen et al, t o be published) the need became evident for a reliable method with which to follow the increase in mechanical strength in healing bone.…”

mentioning

confidence: 99%

Studies on Mechanical Strength of Bone:I. Torsional Strength of Normal Rabbit Tibio-Fibular Bone

Paavolainen

1978

Acta Orthopaedica Scandinavica

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Experimental Measurement of Maximum Torque Capacity of Long Bones

Cited by 46 publications

References 9 publications

The use of a resorbable augmentation device to secure plating of osteoporotic bones

The use of a resorbable augmentation device to secure plating of osteoporotic bones

Torsional strength estimates of femoral diaphyses with endosteal lytic lesions: Dual‐energy x‐ray absorptiometry study

Studies on Mechanical Strength of Bone:I. Torsional Strength of Normal Rabbit Tibio-Fibular Bone

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