Test Bench Development for Femur Stability Assessment

Abstract

This paper shows the design and development of a test bench for humanfemurs. The main uses of this test bench will run from artificial femurs comparisonwith real femurs, to join stability assessment after bone a fracture repair. Amongthis uses is specially designed for condylar fractures testing. The test bench isdeveloped from a self-made existing tensile/compression testing machine. Thedesign procedure is supported by a literature review about the bone mechanicalbehavior and composition generally and the knee joint performance and repairparticularly. On the basis of this review, the machine was designed to simulate theadduction and abduction movements of the joint. The magnitudes to be measuredare: the compression force, the bone displacement (vertical) and the knee joint rotation

Keywords

• Test bench
• Femur fracture
• Condylar fracture

Test Bench Development for Femur Stability Assessment

Abstract

This paper shows the design and development of a test bench for human femurs. The main uses of this test bench will run from artificial femurs comparison with real femurs, to join stability assessment after bone a fracture repair. Among this uses is specially designed for condylar fractures testing. The test bench is developed from a self-made existing tensile/compression testing machine. The design procedure is supported by a literature review about the bone mechanical behavior and composition generally and the knee joint performance and repair particularly. On the basis of this review, the machine was designed to simulate the adduction and abduction movements of the joint. The magnitudes to be measured are: the compression force, the bone displacement (vertical) and the knee joint rotation.

Keywords

• -

References

1. References References
2. Alho A, Husby T, Hoiseth A. Bone mineral content and mechanical strength. An ex-vivo study on human mechanical strength. An ex-vivo study on human mechanical strength. An ex-vivo study on human femora at autopsy. Clin Orthop Rel Res femora at autopsy. Clin Orthop Rel Res femora at autopsy. Clin Orthop Rel Res 1988;227:292–297. 1988;227:292–297. 1988;227:292–297.
3. Engineering, 129 (4), pp. 487-493.
4. Engineering, 129 (4), pp. 487-493.
5. Colton, C., Gebhard, F., Kregor, P., and Oliver, C., 2011. AO Surgery Reference: Distal Femur. AO Foundation, accessed 20 January 2011,www.aofoundation.org.
6. Cristofolini, L., Viceconti, M., Cappello, A., Toni, A., 1996. Mechanical validation of whole bone composite femur models. Journal of Biomechanics, 29 (4), pp. 525-535.
7. Heiner, A.D., Brown, T.D., 2001. Structural properties of a new design of composite replicate femurs and tibias. Journal of Biomechanics, 34 (6), pp. 773-781.
8. Jonnavithula, S., Warren, M.P., Fox, R.P., Lazaro, MI., 1993. Bone density is compromised in amenorrheic women despite return of menses: a 2-year study. Obstet Gynecol. 81(5 ( Pt 1)):669-74.

9. Kolmert, L., Wulff, K., 1982. Epidemiology and treatment of distal femoral. Acta Orthop Scand. 1982 Dec;53(6):957-62.
10. McKellop, H., Ebramzadeh, E., Niederer, P.G., Sarmiento, A., 1991. Comparison of the stability of press-fit hip prosthesis femoral stems using a synthetic model femur. J. Orthop. Res. 9, 297–305.
11. O'Connor, L.M., Davidson, J.A., Davies, B.M., Matthews, M.G. and Smirthwaite, P, 2008. Comparative endurance testing of the Biomet Matthews Nail and the Dynamic Compression Screw, in simulated condylar and supracondylar femoral fractures.
12. Pacific Research Laboratories, 2007. 4th generation composite bones have improved fracture and fatigue properties. Informational handout.
13. Prygoski, M.P., Sanchez-Caballero, S., Schmid, S.R., Lozier, A.J. and Selles, M.A. High Speed Fracture Fixation: Assessing Resulting Fixation Stability and Fastener Withdrawal Strength, 2013. Journal of Biomechanical Engineering, 135 (9), art. no. 091008
14. Martín Águila, A., Ruiz Caballero, D.J., Brito Ojeda, D.E. and Jiménez Díaz, D.J., 2010. Prótesis de rodilla. Biomecánica.
15. traumatología y cirugía ortopédica Jornadas canarias
16. de Sardinha, V.M., Lima, L.L., Belangero, W.D., Zavaglia, C.A, Bavaresco, V.P., Gomes, J.R., 2013. Tribological characterization of polyvinyl alcohol hydrogel as substitute of articular cartilage, Wear, Volume 301, Issues 1–2, April–May 2013, Pages 218-225, ISSN 0043-1648,
17. http://dx.doi.org/10.1016/j.wear.2012.11.054.
18. Stankewitz CJ, Chapman J, Muthusamy R, et al. Relationship of mechanical factors to the strength of proximal femur fractures fixed with cancellous screws. J Orthop Trauma 1996;10:248–257
19. Viano, D. C., and Stalnaker, R. L., 1980. Mechanisms of Femoral Fracture. J. Biomech., 13, pp. 701–715