This is an experimental biomechanical research, in which the strain patterns after implantation of two different femoral stems (cemented vs. cementless version) with different sizes and neck lengths were investigated. Further custom-made cementless stems with different sizes were investigated. Measurements were done in a single-leg stance phase representing the hip joint and abductor muscle forces. Large sized implants induced greater stress shielding than the small stems. The standard cementless stem achieved greater physiological pattern of strain in the proximal femur than did the custom-made stem. The results from the anatomical cemented stems and those from the cementless stems were compared with the strain measurements of the intact femurs. Cementless stems induced strains in the trochanteric region and near the distal end of the stem higher than those of cemented stems.
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This is an experimental biomechanical research, in which the strain patterns after implantation of two different femoral stems (cemented vs. cementless version) with different sizes and neck lengths were investigated. Further custom-made cementless stems with different sizes were investigated. Measurements were done in a single-leg stance phase representing the hip joint and abductor muscle forces. Large sized implants induced greater stress shielding than the small stems. The standard cementles...
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