The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions

Abstract Articular cartilage in knee joint can be anatomically divided into different regions: medial and lateral condyles of femur; patellar groove of femur; medial and lateral plateaus of tibia covered or uncovered by meniscus. The stress–strain curves of cartilage in uniaxially unconfined compres...

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Autores principales:	Heng Li, Jinming Li, Shengbo Yu, Chengwei Wu, Wei Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a7c2f00682284f47bb2b3516f790e74b
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spelling	oai:doaj.org-article:a7c2f00682284f47bb2b3516f790e74b2021-12-02T13:18:00ZThe mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions10.1038/s41598-021-85716-22045-2322https://doaj.org/article/a7c2f00682284f47bb2b3516f790e74b2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85716-2https://doaj.org/toc/2045-2322Abstract Articular cartilage in knee joint can be anatomically divided into different regions: medial and lateral condyles of femur; patellar groove of femur; medial and lateral plateaus of tibia covered or uncovered by meniscus. The stress–strain curves of cartilage in uniaxially unconfined compression demonstrate strain rate dependency and exhibit distinct topographical variation among these seven regions. The femoral cartilage is stiffer than the tibial cartilage, and the cartilage in femoral groove is stiffest in the knee joint. Compared with the uncovered area, the area covered with meniscus shows the stiffer properties. To investigate the origin of differences in macroscopic mechanical properties, histological analysis of cartilage in seven regions are conducted. The differences are discussed in terms of the cartilage structure, composition content and distribution. Furthermore, the commonly used constitutive models for biological tissues, namely Fung, Ogden and Gent models, are employed to fit the experimental data, and Fung and Ogden models are found to be qualified in representing the stiffening effect of strain rate.Heng LiJinming LiShengbo YuChengwei WuWei ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Heng Li Jinming Li Shengbo Yu Chengwei Wu Wei Zhang The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
description	Abstract Articular cartilage in knee joint can be anatomically divided into different regions: medial and lateral condyles of femur; patellar groove of femur; medial and lateral plateaus of tibia covered or uncovered by meniscus. The stress–strain curves of cartilage in uniaxially unconfined compression demonstrate strain rate dependency and exhibit distinct topographical variation among these seven regions. The femoral cartilage is stiffer than the tibial cartilage, and the cartilage in femoral groove is stiffest in the knee joint. Compared with the uncovered area, the area covered with meniscus shows the stiffer properties. To investigate the origin of differences in macroscopic mechanical properties, histological analysis of cartilage in seven regions are conducted. The differences are discussed in terms of the cartilage structure, composition content and distribution. Furthermore, the commonly used constitutive models for biological tissues, namely Fung, Ogden and Gent models, are employed to fit the experimental data, and Fung and Ogden models are found to be qualified in representing the stiffening effect of strain rate.
format	article
author	Heng Li Jinming Li Shengbo Yu Chengwei Wu Wei Zhang
author_facet	Heng Li Jinming Li Shengbo Yu Chengwei Wu Wei Zhang
author_sort	Heng Li
title	The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
title_short	The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
title_full	The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
title_fullStr	The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
title_full_unstemmed	The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
title_sort	mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a7c2f00682284f47bb2b3516f790e74b
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The mechanical properties of tibiofemoral and patellofemoral articular cartilage in compression depend on anatomical regions

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