Modeling of Titanium Alloy Implant for Fractured Distal Femur

In the present work, reverse engineering (RE) approach has been used to create a 3D model of a fractured femur bone using the computed tomography (CT) scan data. Thereafter, counter fit fixation plates of Titanium alloy (Ti6Al4V) have been designed and analyzed considering physiological static loading conditions. From the analysis, it has been inferred that the stresses and deformation developed are quite low. It implies that these designed customized fixation plates are able to provide stable fixation resulting in improved fracture union.




References:
[1] OTS Canadian, “Nonunion following intramedullary nailing of the femur with and without reaming. Results of a multicenter randomized clinical trial,” The Journal of Bone and Joint Surgery American Volume, vol. 85, pp. 2093-2096, 2003.
[2] M. J. Beltran, J. L. Gary and C. A. Collinge, “Management of distal femur fractures with modern plates and nails: state of the art,” Journal of Orthopaedic Trauma, vol. 29, pp. 165-172, 2015.
[3] A. K. Gangavalli, C. O. Nwachuku, “Management of distal femur fractures in adults: an overview of options,” Orthopedic Clinics, vol. 47, pp. 85-96, 2016.
[4] R. Reina, F. E. Vilella, N. Ramírez, R. Valenzuela, G. Nieves and C. A. Foy, “Knee pain and leg-length discrepancy after retrograde femoral nailing,” American Journal Of Orthopedics, vol. 36, pp. 325, 2007.
[5] M. Malik, P. Harwood, P. Diggle and S. Khan, “Factors affecting rates of infection and nonunion in intramedullary nailing,” The Journal of bone and joint surgery British volume, vol. 86, pp. 556-560, 2004.
[6] T. J. Lujan, C .E. Henderson, S. M. Madey, D. C. Fitzpatrick, J. L. Marsh and M. Bottlang, “Locked plating of distal femur fractures leads to inconsistent and asymmetric callus formation,” Journal of Orthopaedic Trauma, vol. 24, pp. 156-162, 2010.
[7] W. M. Ricci, P. N. Streubel, S. Morshed, C. A. Collinge, S. E. Nork and M. J. Gardner, “Risk factors for failure of locked plate fixation of distal femur fractures: an analysis of 335 cases,” Journal of Orthopaedic Trauma, vol. 28, pp. 83-89, 2014.
[8] A. Gefen, “Optimizing the biomechanical compatibility of orthopedic screws for bone fracture fixation,” Medical Engineering & Physics, vol. 24, pp. 337-347, 2002.
[9] Y. P. Lin, C. T. Wang and K. R. Dai, “Reverse engineering in CAD model reconstruction of customized artificial joint,” Medical Engineering & Physics, vol. 27, pp. 189-193, 2005.
[10] N. Narra, J. Valášek, M. Hannula, P. Marcián, G. K. Sándor, J. Hyttinen and J. Wolff, “Finite element analysis of customized reconstruction plates for mandibular continuity defect therapy,” Journal of Biomechanics, vol. 47, pp. 264-268, 2015.
[11] D. S. Shin, K. Lee and D. Kim, “Biomechanical study of lumbar spine with dynamic stabilization device using finite element method,” Computer-Aided Design, vol. 39, pp. 559-567, 2007.