Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees
Instability remains one of the most common indications for revision after total knee arthroplasty. To gain a better understanding of how an implant will perform in vivo and support surgeons in selecting the most appropriate implant design for an individual patient, it is crucial to evaluate the impl...
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MDPI AG
2025-01-01
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| Series: | Bioengineering |
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| author | Saskia A. Brendle Sven Krueger Joachim Grifka Peter E. Müller William M. Mihalko Berna Richter Thomas M. Grupp |
| author_facet | Saskia A. Brendle Sven Krueger Joachim Grifka Peter E. Müller William M. Mihalko Berna Richter Thomas M. Grupp |
| author_sort | Saskia A. Brendle |
| collection | DOAJ |
| description | Instability remains one of the most common indications for revision after total knee arthroplasty. To gain a better understanding of how an implant will perform in vivo and support surgeons in selecting the most appropriate implant design for an individual patient, it is crucial to evaluate the implant constraint within clinically relevant ligament and boundary conditions. Therefore, this study investigated the constraint of three different implant designs (symmetrical implants with and without a post-cam mechanism and an asymmetrical medial-stabilized implant) under anterior–posterior shear forces and internal–external rotation moments at different flexion angles in human cadaveric knees using a six-degrees-of-freedom joint motion simulator. Both symmetrical designs showed no significant differences between the anterior–posterior range of motion of the medial and lateral condyles. In contrast, the medial-stabilized implant exhibited less anterior–posterior translation medially than laterally, without constraining the medial condyle to a fixed position. Furthermore, the post-cam implant design showed a significantly more posterior position of the femoral condyles in flexion compared to the other designs. The results show that despite the differences in ligament situations and individual implant positioning, specific characteristics of each implant design can be identified, reflecting the different geometries of the implant components. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Bioengineering |
| spelling | doaj-art-cdd58dacb2874dda9c581c5553d799232025-01-24T13:23:13ZengMDPI AGBioengineering2306-53542025-01-011218710.3390/bioengineering12010087Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric KneesSaskia A. Brendle0Sven Krueger1Joachim Grifka2Peter E. Müller3William M. Mihalko4Berna Richter5Thomas M. Grupp6Research & Development, Aesculap AG, 78532 Tuttlingen, GermanyResearch & Development, Aesculap AG, 78532 Tuttlingen, GermanyDepartment of Orthopaedics, Asklepios Klinikum, 93077 Bad Abbach, GermanyDepartment of Orthopaedic and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Campus Grosshadern, LMU Munich, 81377 Munich, GermanyCampbell Clinic Department of Orthopaedic Surgery & Biomedical Engineering, University of Tennessee Health Science Center, Memphis, TN 38104, USAResearch & Development, Aesculap AG, 78532 Tuttlingen, GermanyResearch & Development, Aesculap AG, 78532 Tuttlingen, GermanyInstability remains one of the most common indications for revision after total knee arthroplasty. To gain a better understanding of how an implant will perform in vivo and support surgeons in selecting the most appropriate implant design for an individual patient, it is crucial to evaluate the implant constraint within clinically relevant ligament and boundary conditions. Therefore, this study investigated the constraint of three different implant designs (symmetrical implants with and without a post-cam mechanism and an asymmetrical medial-stabilized implant) under anterior–posterior shear forces and internal–external rotation moments at different flexion angles in human cadaveric knees using a six-degrees-of-freedom joint motion simulator. Both symmetrical designs showed no significant differences between the anterior–posterior range of motion of the medial and lateral condyles. In contrast, the medial-stabilized implant exhibited less anterior–posterior translation medially than laterally, without constraining the medial condyle to a fixed position. Furthermore, the post-cam implant design showed a significantly more posterior position of the femoral condyles in flexion compared to the other designs. The results show that despite the differences in ligament situations and individual implant positioning, specific characteristics of each implant design can be identified, reflecting the different geometries of the implant components.https://www.mdpi.com/2306-5354/12/1/87kneebiomechanicscadaveric studyanterior–posterior stabilityTKA design |
| spellingShingle | Saskia A. Brendle Sven Krueger Joachim Grifka Peter E. Müller William M. Mihalko Berna Richter Thomas M. Grupp Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees Bioengineering knee biomechanics cadaveric study anterior–posterior stability TKA design |
| title | Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees |
| title_full | Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees |
| title_fullStr | Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees |
| title_full_unstemmed | Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees |
| title_short | Constraint of Different Knee Implant Designs Under Anterior–Posterior Shear Forces and Internal–External Rotation Moments in Human Cadaveric Knees |
| title_sort | constraint of different knee implant designs under anterior posterior shear forces and internal external rotation moments in human cadaveric knees |
| topic | knee biomechanics cadaveric study anterior–posterior stability TKA design |
| url | https://www.mdpi.com/2306-5354/12/1/87 |
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