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Digitale Medien

Warping of cross sections in the torsion of long bones with internal fracture fixation plates (1987)

Beaupré, G. S. ; Carter, D. R.

Hoboken, NJ [u.a.] : Wiley-Blackwell

Journal of Orthopaedic Research 5 (1987), S. 296-299

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ISSN: 0736-0266

Schlagwort(e): Torsion ; Warping ; Internal fixation ; Bone plating ; Stress shielding ; Life and Medical Sciences

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Medizin

Notizen: Torsion of noncircular beams results in warping of each cross section. When noncircular cross sections are constrained to remain plane, the resulting shear stress distribution is different from what Saint Venant torsion (with warping) would predict. This has practical implications to the stress analysis of plated long bones subjected to torsional loadings. Analyses in which warping is not allowed predict incorrect stress fields in the plate and bone and overpredict the amount of stress shielding associated with fracture plate fixation.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jor.1100050216

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Digitale Medien

Effects of ingrowth, geometry, and material on stress transfer under porous-coated hip surface replacements (1988)

Fyhrie, D. P. ; Carter, D. R. ; Schurman, D. J.

Hoboken, NJ [u.a.] : Wiley-Blackwell

Journal of Orthopaedic Research 6 (1988), S. 425-433

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ISSN: 0736-0266

Schlagwort(e): Surface replacement ; Prosthesis design ; Finite elements ; Stress shielding ; Porous ingrowth ; Life and Medical Sciences

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Medizin

Notizen: Three different interface geometries for porous ingrowth surface replacements of the hip were examined using two-dimensional linear and non-linear contact finite element analyses. The results indicate that incorporation of a nearly flat prosthesis interface between the surface replacement and the underlying cancellous bone may reduce stress shielding and improve stress transfer from the component. For all designs analyzed, the bone stress shielding was insensitive to component material stiffness when the elastic modulus was 〉30 MPa. The use of titanium instead of cobalt-chrome (Co-Cr) as the prosthesis material therefore had a negligible effect on stress shielding.

Zusätzliches Material: 9 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jor.1100060314

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