Femur Design Parameters and Contact Stresses at UHMWPE Hip Joint Cup

Abstract:

The contact stress that occurs in the ultra-high molecular weight polyethylene (UHMWPE) hip joint cup has been shown to be correlated with the implant wear rate. The wear of the hip joint is considered as one of the main factors that affect the long term performance of the implant. The contact stress that occurs in the UHMWPE hip joint cup is affected by the implant dimensions and materials. In this study, four different femur materials and geometries were used to investigate the effects of femur design parameters on the resultant contact stress on the UHMWPE cup. The results of the finite element (FE) simulation show that the contact stresses at the UHMWPE cup decreases dramatically with increasing the femur diameter. Also the results indicated that the contact stresses on the UHMWPE cup decrease significantly when using functionally graded (FG) femur with low modulus of elasticity. The presence of metal backing results in a slight reduction in the UHMWPE cup contact stresses especially for small femurs. Finally, the presence of a gap between the UHMWPE cup and the femur results in a remarkable increase in the cup stress especially for a small femur. The hip joint femur dimensions and materials are thought to play an important role in the transition of load in the implant and should be taken into consideration during the design of the hip joint.

• Periodical: Key Engineering Materials (Volume 478)
• Pages: 93-102
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.478.93
• Online since: April 2011
• Authors: H. Fouad, S.M. Darwish
• Keywords: CoCrMo, Cup Dimensions, Fe, Femur, FGM, SS, Ti, UHMWPE

References

[1] S.H. Teoh,W. H . Chan and R. Thampuran: Journal of Biomechanics Vol. 35 (2002), p.323.

[2] S. Vesa and S. Ming: Wear Vol. 268 (2010), p.617.

[3] A. Unsworth, S. C. Scholes, S.L. Smith A.P.D. Elfick and H.A. Ash : Tribology and Interface Engineering Series Vol. 38 (2000), p.195.

[4] L.V. Wilches, J. A. Uribe and A. Toro: Wear Vol. 265 (2008), p.143.

[5] T. Ilchmann, M. Reimold and W. Müller-Schauenburg: A simple access to geometrical concepts. Medical Engineering & Physics Vol. 30 (2008), p.373.

[6] B. Lowry, D. David, R. Scott Corpe, N. Satya, C. Michael and T. Irina: The Journal of Arthroplasty Vol. 23 (2008), p.56.

[7] S. Affatato , G. Bersaglia , M. Rocchi , P. Taddei , C. Fagnano and A. Toni: Biomaterials Vol. 26 (2005), p.3259.

DOI: 10.1016/j.biomaterials.2004.07.070

[8] W. Qingliang, L. Jinlong and G. Shirong: Journal of Bionic Engineering Vol. 6 (2009), p.378.

[9] F. Jevan, A. Martin, B. Sonny, A. Seth Greenwald, H. David, P. Brad, R. Michael and P. Lisa: Biomaterials Vol. 30 (2009), p.5572.

[10] H. Fouad: Materials & Design Vol. 31 (2010), p.1117.

[11] A-HI. Mourad, H. Fouad and E. Rabeh: Materials & Design Vol. 30 (2009), p.4112.

[12] H. Fouad, A-HI. Mourad and D. C. Barton: Polymer Testing Vol. 24 (2005), p.549.

[13] H. Fouad, A-HI. Mourad and D.C. Barton: Plast Rubber Compos Vol. 37 (2008), p.346.

[14] S. Griza, A.N. Cê, E.P. Silva, F. Bertoni, A. Reguly and T.R. Strohaecker: Engineering Failure Analysis Vol. 16 (2009), p. (2036).

DOI: 10.1016/j.engfailanal.2009.01.004

[15] C.W. Ray, J.J. Joshua, A. Barrington and E.R. Harry: The Journal of Arthroplasty Vol. 20 (2005), p.914.

[16] S.C. Frank, E.D.C. Paul, A.K. Ashay, F.L. Jen, H.F. Victor, A.S. Steven and D.Z. Joseph: The Journal of Arthroplasty Vol. 13 (1998), p.867.

[17] R.K. Korhonen, A. Koistinen , Y.T. Konttinen , S.S. Santavirta and R. Lappalainen: BioMedical Engineering Online Vol. 4 (2005), p.32.

[18] E. Rixrath, S. Wendling-Mansuy, X. Flecher, P. Chabrand and N. Argenson: Journal of Biomechanics Vol. 41 (2008), p.1137.

DOI: 10.1016/j.jbiomech.2007.12.009

[19] T. Bertram, H. Anton, K. Johan, K. Veronika, F. Gunnar, V. Nico and D. Ron: Journal of Biomechanics Vol. 41 (2008), p.100.

[20] P.S.M. Barbour , D.C. Barton and J. Fisher: Wear Vol. 181-183 (1995), p.250.

[21] J. Hai-bo: Journal of Bionic Engineering Vol. 4 (2007), p.123.

[22] B. David and G. Tarun: Materials & Design Vol. 29 (2008), p.45.

[23] S.D. Marianne, W. Luc, D. Siegfried and S. Kai-Uwe: Medical Engineering & Physics Vol. 30 (2008), p.1186.

[24] L. Kang, A.L. Galvin, Z.M. Jin and J. Fisher: Proceedings of the Institution of Mechanical Engineers, Part H (Journal of Engineering in Medicine) Vol. 220- H1 (2006), p.33.

[25] G.B. John, K.D. Thomas, A.W. Paul and C.C. Ian: The Journal of Arthroplasty Vol. 23 (2008), p.1090.

[26] P.D.E. Alistair, M.H. Richard, M.P. Ian and U. Anthony: The Journal of Arthroplasty Vol. 13 (1998), p.291.

[27] S.M. Darwish and A.M. Al-Samhan: J. of Materials Science and Engineering Technology Vol. 40 (2009), p.218.

[28] K.M. Orhun, R.B. Charles, O'C. Daniel, S.P. Rebecca, M.E. Daniel, J. Murali and H.H. William: The Journal of Arthroplasty Vol. 16 (2001), p.24.

[29] H. Fouad: Materials and Design Vol. 31 (2010), p.1117.

[30] A. Wang, A. Essner and R. Klein: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine Vol. 215(H2) (2001), p.133.

[31] J.D. Currey: The Journal of Experimental Biology Vol. 202 (1999), p.2495.