Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio

The objective of this study was to set forth guidelines for designing such an artificial knee joint that can make deep flexion. To this respect, we performed 2D model simulation for deep squatting in which the conventional posterior stabilized knee prosthesis was fitted. In the simulation we introdu...

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Autores principales:	Michihiko Fukunaga, Jin Kawanoya, Shunji Hirokawa
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2011
Materias:	artificial knee joint femoral rollback slip ratio posterior stabilized type 2d model analysis Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/fe30f85b6ca44b4c8ff4e5e0f7bdfefb
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spelling	oai:doaj.org-article:fe30f85b6ca44b4c8ff4e5e0f7bdfefb2021-11-05T09:26:17ZControl of Femoral Rollback of PS Knee Prosthesis through Slip Ratio1881-219810.2474/trol.6.32https://doaj.org/article/fe30f85b6ca44b4c8ff4e5e0f7bdfefb2011-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/6/1/6_1_32/_pdf/-char/enhttps://doaj.org/toc/1881-2198The objective of this study was to set forth guidelines for designing such an artificial knee joint that can make deep flexion. To this respect, we performed 2D model simulation for deep squatting in which the conventional posterior stabilized knee prosthesis was fitted. In the simulation we introduced a newly defined slip ratio in order to describe an over slipping phenomenon; the slipping and the rolling directions were mutually reversing. Then, the results demonstrated that the slip ratio was over 1 at high and deep flexion, indicating that the femoral rollback did not occur even though the post and the cam contacted. The relation also indicated that the conventional post-cam mechanism would not work appropriately at high/deep flexion. To overcome the above, and to promote femoral rollback even at high/deep flexion, we proposed a new design of the post-cam mechanism, which we called as a ball-ditch mechanism.Michihiko FukunagaJin KawanoyaShunji HirokawaJapanese Society of Tribologistsarticleartificial knee jointfemoral rollbackslip ratioposterior stabilized type2d model analysisPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 6, Iss 1, Pp 32-35 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	artificial knee joint femoral rollback slip ratio posterior stabilized type 2d model analysis Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	artificial knee joint femoral rollback slip ratio posterior stabilized type 2d model analysis Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Michihiko Fukunaga Jin Kawanoya Shunji Hirokawa Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
description	The objective of this study was to set forth guidelines for designing such an artificial knee joint that can make deep flexion. To this respect, we performed 2D model simulation for deep squatting in which the conventional posterior stabilized knee prosthesis was fitted. In the simulation we introduced a newly defined slip ratio in order to describe an over slipping phenomenon; the slipping and the rolling directions were mutually reversing. Then, the results demonstrated that the slip ratio was over 1 at high and deep flexion, indicating that the femoral rollback did not occur even though the post and the cam contacted. The relation also indicated that the conventional post-cam mechanism would not work appropriately at high/deep flexion. To overcome the above, and to promote femoral rollback even at high/deep flexion, we proposed a new design of the post-cam mechanism, which we called as a ball-ditch mechanism.
format	article
author	Michihiko Fukunaga Jin Kawanoya Shunji Hirokawa
author_facet	Michihiko Fukunaga Jin Kawanoya Shunji Hirokawa
author_sort	Michihiko Fukunaga
title	Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
title_short	Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
title_full	Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
title_fullStr	Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
title_full_unstemmed	Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio
title_sort	control of femoral rollback of ps knee prosthesis through slip ratio
publisher	Japanese Society of Tribologists
publishDate	2011
url	https://doaj.org/article/fe30f85b6ca44b4c8ff4e5e0f7bdfefb
work_keys_str_mv	AT michihikofukunaga controloffemoralrollbackofpskneeprosthesisthroughslipratio AT jinkawanoya controloffemoralrollbackofpskneeprosthesisthroughslipratio AT shunjihirokawa controloffemoralrollbackofpskneeprosthesisthroughslipratio
_version_	1718444387695853568

Control of Femoral Rollback of PS Knee Prosthesis through Slip Ratio

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