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Probabilistic finite element analysis of the uncemented hip replacement-effect of femur characteristics and implant design geometry

By Carolina Dopico González, Andrew M.R. New and Martin Browne

Abstract

In the present study, a probabilistic finite element tool was assessed using an uncemented total hip replacement model. Fully bonded and frictional interfaces were investigated for combinations of three proximal femurs and two implant designs, the Proxima short stem and the IPS hip stem prostheses. The Monte Carlo method was used with two performance indicators: the percentage of bone volume that exceeded specified strain limits and the maximum nodal micromotion. The six degrees of freedom of bone-implant relative position, magnitude of the hip contact force (L), and spatial direction of L were the random variables. The distal portion of the proximal femurs was completely constrained, and some of the main muscle forces acting in the hip were applied. The coefficients of the linear approximation between the random variables and the output were used as the sensitivity values. In all cases, bone-implant position related parameters were the most sensitive parameters. The results varied depending on the femur, the implant design and the interface conditions. Values of maximum nodal micromotion agreed with results from previous studies, confirming the robustness of the implemented computational tool. It was demonstrated that results from a single model study should not be generalised to the entire population of femurs, and that bone variability is an important factor that should be investigated in such analyses

Year: 2010
OAI identifier: oai:eprints.soton.ac.uk:143233
Provided by: e-Prints Soton

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  1. (2003). Probabilistic analysis of a cemented hip implant, doi
  2. (2004). Comparison of the elastic and yield properties of human femoral trabecular and cortical bone tissue. doi
  3. (2001). Hip contact forces and gait patterns from routine activities. doi
  4. (2005). Preclinical testing of femoral hip components: an experimental investigation with four prostheses. doi
  5. (1999). Reliability theory for load bearing biomedical implants. doi
  6. (1991). Micromotion of cemented and uncemented femoral components.
  7. (1992). The effect of femoral stem geometry on interface motion in uncemented porous-coated total hip prostheses. Comparison of straight-stem and curved-stem designs.
  8. (1991). Evaluation of orthogonal mechanical properties and density of human trabecular bone from the major metaphyseal regions with materials testing and computed tomography. doi
  9. Femoral strength is better predicted by finite element models than QCT and DXA. doi
  10. (2005). Changes in strain distribution of loaded proximal femora caused by different types of cementless femoral stems. doi
  11. (2009). Computational tool for the probabilistic finite element analysis of an uncemented total hip replacement considering variability in bone-implant version angle. doi
  12. (2009). Probabilistic analysis of an uncemented total hip replacement. doi
  13. Claes, L.,1998. Influence of muscle forces on femoral strain distribution. doi
  14. (2007). Finite element-based probabilistic analysis tool for orthopaedic applications. doi
  15. (1979). Does persistent fetal femoral anteversion contribute to osteoarthritis?: a oreliminary report. Clinical Orthopedics Related Research Nov–Dec, doi
  16. (2001). Influence of femoral anteversion on proximal femoral loading: measurement and simulation in four patients. doi
  17. (1988). Femoral anteversion and restricted range of motion in total hip prostheses. doi
  18. (2004). Stair climbing is more critical than walking in pre-clinical assessment of primary stability in cementless THA in vitro. doi
  19. (2001). Biomechanics of trabecular bone. doi
  20. (1994). Predicting the compressive mechanical behavior of bone. doi
  21. (2001). Improved prediction of proximal femoral fracture load using nonlinear finite element models. doi
  22. (2001). Prediction of fracture location in the proximal femur using finite element models. doi
  23. (1999). Yield strain behavior of trabecular bone. doi
  24. (2007). Incorporating uncertainty in mechanical properties for finite element-based evaluation of bone mechanics. doi
  25. (1991). Fracture prediction for the proximal femur using finite element models: part I—linear analysis. doi
  26. (1991). Fracture prediction for the proximal femur using finite element models: part II—nonlinear analysis. doi
  27. (2005). Stress distributions within the proximal femur in gait and falls: implications for osteoporotic fracture. doi
  28. (2008). Validation of musculoskeletal gait simulation for use in investigation of total hip replacement, doi
  29. (2007). The Application of Probabilistic Methods for the Assessment of Hip Implant Performance.
  30. (2001). Dependence of yield strain of human trabecular bone on anatomic site. doi
  31. (2001). Probabilistic risk analysis of a cemented hip implant. doi
  32. (2006). The effect of threedimensional shape optimization on the probabilistic response of a cemented femoral hip prosthesis. doi
  33. (2004). Influence of component positions on dislocation. Computed tomographic evaluations in a consecutive series of total hip arthroplasty. doi
  34. (2006). Probabilistic analysis of the influence of the bonding degree of the stem-cement interface in the performance of cemented hip prostheses. doi
  35. (2007). Determination of suitable sample sizes for multi-patient based finite element studies. doi
  36. (2006). Tetrahedral versus hexaedral finite elements in numerical modelling of the proximal femur. doi
  37. (1982). Anteversion of the acetabulum in patients with idiopathic increased anteversion of the femoral neck. doi
  38. (2007). Application of a Maximum Principal Strain Failure Criterion in Subject-Specific Finite Element Models of Bones, doi
  39. (2007). Influence of changes in stem positioning on femoral loading after THR using a shortstemmed hip implant. doi
  40. (2009). Please cite this article as: Dopico-Gonza ´lez, C., et al., Probabilistic finite element analysis of the uncemented hip replacement—effect of femur characteristics and implant design geometry. doi
  41. (1984). Design sensitivity analysis: a new method for implant design and comparison with parametric finite element analysis. doi
  42. (1998). Material properties assignment to finite element models of bone structures: a new method. doi

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