Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness

Although simulation models are heavily used in biomechanical research and testing of TKA implants, pre-clinical tools for a holistic estimation of implant performance under dynamic loading conditions are rare. The objective of this study was the development of an efficient pre-clinical test method f...

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Autores principales:	Adrian Sauer, Allan Maas, Svenja Ottawa, Alexander Giurea, Thomas M. Grupp
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dynamic finite element model knee kinematics patellofemoral kinematics pre-clinical testing total knee arthroplasty patellar tendon Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/8ffd8c58002b423e894eb5478e93c709
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spelling	oai:doaj.org-article:8ffd8c58002b423e894eb5478e93c7092021-11-11T15:20:56ZTowards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness10.3390/app1121103222076-3417https://doaj.org/article/8ffd8c58002b423e894eb5478e93c7092021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10322https://doaj.org/toc/2076-3417Although simulation models are heavily used in biomechanical research and testing of TKA implants, pre-clinical tools for a holistic estimation of implant performance under dynamic loading conditions are rare. The objective of this study was the development of an efficient pre-clinical test method for analyzing knee contact mechanics and kinematics based on a dynamic FE model and to evaluate the effects of the proximo-distal patella position and the patellar tendon stiffness on the patellar kinematics. A finite element-based workflow for knee prostheses designs was developed based on standardized in vivo load data, which included the tibial forces and moments. In a new research approach, the tibial forces are used as input for the model, whereas the tibial moments were used to validate the results. For the standardized sit down, stand up, and knee bend load cycles, the calculated tibial moments show only small deviations from the reference values—especially for high flexion angles. For the knee bend cycle, the maximum absolute value of patellar flexion decreases for higher patellar tendon stiffness and more distally placed patellar components. Therefore, patella-related clinical problems caused by patella baja may also arise if the patellar tendon is too weak for high tibiofemoral flexion angles.Adrian SauerAllan MaasSvenja OttawaAlexander GiureaThomas M. GruppMDPI AGarticledynamic finite element modelknee kinematicspatellofemoral kinematicspre-clinical testingtotal knee arthroplastypatellar tendonTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10322, p 10322 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dynamic finite element model knee kinematics patellofemoral kinematics pre-clinical testing total knee arthroplasty patellar tendon Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	dynamic finite element model knee kinematics patellofemoral kinematics pre-clinical testing total knee arthroplasty patellar tendon Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Adrian Sauer Allan Maas Svenja Ottawa Alexander Giurea Thomas M. Grupp Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
description	Although simulation models are heavily used in biomechanical research and testing of TKA implants, pre-clinical tools for a holistic estimation of implant performance under dynamic loading conditions are rare. The objective of this study was the development of an efficient pre-clinical test method for analyzing knee contact mechanics and kinematics based on a dynamic FE model and to evaluate the effects of the proximo-distal patella position and the patellar tendon stiffness on the patellar kinematics. A finite element-based workflow for knee prostheses designs was developed based on standardized in vivo load data, which included the tibial forces and moments. In a new research approach, the tibial forces are used as input for the model, whereas the tibial moments were used to validate the results. For the standardized sit down, stand up, and knee bend load cycles, the calculated tibial moments show only small deviations from the reference values—especially for high flexion angles. For the knee bend cycle, the maximum absolute value of patellar flexion decreases for higher patellar tendon stiffness and more distally placed patellar components. Therefore, patella-related clinical problems caused by patella baja may also arise if the patellar tendon is too weak for high tibiofemoral flexion angles.
format	article
author	Adrian Sauer Allan Maas Svenja Ottawa Alexander Giurea Thomas M. Grupp
author_facet	Adrian Sauer Allan Maas Svenja Ottawa Alexander Giurea Thomas M. Grupp
author_sort	Adrian Sauer
title	Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
title_short	Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
title_full	Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
title_fullStr	Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
title_full_unstemmed	Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness
title_sort	towards a new, pre-clinical, subject-independent test model for kinematic analysis after total knee arthroplasty—influence of the proximo-distal patella position and patellar tendon stiffness
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8ffd8c58002b423e894eb5478e93c709
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Towards a New, Pre-Clinical, Subject-Independent Test Model for Kinematic Analysis after Total Knee Arthroplasty—Influence of the Proximo-Distal Patella Position and Patellar Tendon Stiffness

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