@article{01GY9YMK6YWA93FQRZHC02BZJM,
  abstract     = {{Aims The goal was to evaluate tibiofemoral knee joint kinematics during stair descent, by simulat-ing the full stair descent motion in vitro. The knee joint kinematics were evaluated for two types of knee implants: bi-cruciate retaining and bi-cruciate stabilized. It was hypothesized that the bi-cruciate retaining implant better approximates native kinematics.Methods The in vitro study included 20 specimens which were tested during a full stair descent with physiological muscle forces in a dynamic knee rig. Laxity envelopes were measured by apply-ing external loading conditions in varus/valgus and internal/external direction.Results The laxity results show that both implants are capable of mimicking the native internal/ external-laxity during the controlled lowering phase. The kinematic results show that the bi-cruciate retaining implant tends to approximate the native condition better compared to bi-cruciate stabilized implant. This is valid for the internal/external rotation and the anteropos-terior translation during all phases of the stair descent, and for the compression-distraction of the knee joint during swing and controlled lowering phase.Conclusion The results show a better approximation of the native kinematics by the bi-cruciate retain-ing knee implant compared to the bi-cruciate stabilized knee implant for internal/external rotation and anteroposterior translation. Whether this will result in better patient outcomes remains to be investigated.}},
  author       = {{Chevalier, Amélie and Vermue, Hannes and Pringels, Lauren and Herregodts, Stijn and Duquesne, Kate and Victor, Jan and Loccufier, Mia}},
  issn         = {{2046-3758}},
  journal      = {{BONE & JOINT RESEARCH}},
  keywords     = {{Orthopedics and Sports Medicine,Surgery,Bi-cruciate retaining implants,Knee laxity,Total knee arthroplasty,Stair descent}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{285--293}},
  publisher    = {{British Editorial Society of Bone & Joint Surgery}},
  title        = {{Knee kinematics during staircase descent : native, after bi-cruciate retaining and bi-cruciate stabilized total knee arthroplasty}},
  url          = {{http://doi.org/10.1302/2046-3758.124.bjr-2022-0298.r2}},
  volume       = {{12}},
  year         = {{2023}},
}

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