Screw home motion after total knee replacement.

Abstract:

:The objective of this study was to evaluate the effect of muscle force and the posterior cruciate ligament on screw home motion in patients with total knee replacement in a posterior cruciate ligament retaining prosthesis (10 knees) and a posterior cruciate ligament substituting prosthesis (10 knees). Screw home motion was examined with only active extension and with two types of externally loaded active extension (2 kg and body weight). Screw home motion was measured with a 6 degrees of freedom electrogoniometer (instrumented spatial linkage). Retaining the posterior cruciate ligament maintained screw home motion, with and without external load to muscles, whereas substituting the posterior cruciate ligament maintained screw home motion only under the full external load of body weight. This was not seen with a 2-kg external load. As for the normal knee, it appears that screw home motion of a prosthetic knee is influenced, not only by the presence of ligamentous structures, but also by the activity of the muscles. The activity of the muscles may have a much greater effect on screw home motion with currently used prosthetic designs than does the presence of ligamentous structures.

journal_name

Clin Orthop Relat Res

authors

Ishii Y,Terajima K,Koga Y,Bechtold JE

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

181-7

issue

358

eissn

0009-921X

issn

1528-1132

pub_type

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