Bi-cruciate stabilized total knee arthroplasty can reduce the risk of knee instability associated with posterior tibial slope
- 22.09.2017
- Knee
Erschienen in:
- Verfasst von
- Masaru Hada
- Hideki Mizu-uchi
- Ken Okazaki
- Takao Kaneko
- Koji Murakami
- Yuan Ma
- Satoshi Hamai
- Yasuharu Nakashima
- Erschienen in
- Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 6/2018
Abstract
Purpose
The purpose of this study was to evaluate the relationship between posterior tibial slope and knee kinematics in bi-cruciate stabilized (BCS) total knee arthroplasty (TKA), which has not been previously reported.
Methods
This computer simulation study evaluated Journey 2 BCS components (Smith & Nephew, Inc., Memphis, TN, USA) implanted in a female patient to simulate weight-bearing stair climbing. Knee kinematics, patellofemoral contact forces, and quadriceps forces during stair climbing (from 86° to 6° of flexion) were computed in the simulation. Six different posterior tibial slope angles (0°–10°) were simulated to evaluate the effect of posterior tibial slope on knee kinematics and forces.
Results
At 65° of knee flexion, no anterior sliding of the tibial component occurred if the posterior tibial slope was less than 10°. Anterior contact between the anterior aspect of the tibial post- and the femoral component was observed if the posterior tibial slope was 6° or more. An increase of 10° in posterior tibial slope (relative to 0°) led to a 4.8% decrease in maximum patellofemoral contact force and a 1.2% decrease in maximum quadriceps force.
Conclusion
BCS TKA has a wide acceptable range of posterior tibial slope for avoiding knee instability if the posterior tibial slope is less than 10°. Surgeons should prioritize avoiding adverse effects over trying to achieve positive effects such as decreasing patellofemoral contact force and quadriceps force by increasing posterior tibial slope. Our study helps surgeons determine the optimal posterior tibial slope during surgery with BCS TKA; posterior tibial slope should not exceed 10° in routine clinical practice.
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- Titel
- Bi-cruciate stabilized total knee arthroplasty can reduce the risk of knee instability associated with posterior tibial slope
- Verfasst von
-
Masaru Hada
Hideki Mizu-uchi
Ken Okazaki
Takao Kaneko
Koji Murakami
Yuan Ma
Satoshi Hamai
Yasuharu Nakashima
- Publikationsdatum
- 22.09.2017
- Verlag
- Springer Berlin Heidelberg
- Erschienen in
-
Knee Surgery, Sports Traumatology, Arthroscopy / Ausgabe 6/2018
Print ISSN: 0942-2056
Elektronische ISSN: 1433-7347 - DOI
- https://doi.org/10.1007/s00167-017-4718-0
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