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The Impact of Hip Implant Alignment on Muscle and Joint Loading during Dynamic Activities

Dr. Peter Laz, Dr. Kevin Shelburne & Dr. Paul Rullkoetter

Component alignment is an important consideration in total hip arthroplasty. The impact of changes in alignment on muscle forces and joint contact forces during dynamic tasks are not well understood, and have the potential to influence surgical decision making. The objectives of this study were to assess the impact of femoral head/stem and cup component placement on hip muscle and joint contact forces during tasks of daily living and to identify which alignment parameters have the greatest impact on joint loading.