2011 Influence of prosthesis design and implantation technique on implant stresses after cementless revision THR

Description: Femoral offset influences the forces at the hip and the implant stresses after revision THR. For extended bone defects, these forces may cause considerable bending moments within the implant, possibly leading to implant failure. This study investigates the influences of femoral anteversion and offset on stresses in the Wagner SL revision stem implant under varying extents of bone defect conditions.
Conclusion Although increased stresses were observed within the stem with larger offset and increased anteversion, these findings indicate that restoration of offset, key to restoring joint function, is unlikely to result in excessive implant stresses under routine activities if appropriate fixation can be achieved.
Influence of prosthesis design and implantation technique on implant stresses after cementless revision THR Heller MO, Mehta M, Taylor WR, Kim DY, Speirs A, Duda GN, Perka C Journal of Orthopaedic Surgery and Research 2011, 6:20 (full text)