Measurements of constraint of total knee replacement

Hani Haider, P. S. Walker

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Measurement of the constraint of total knee components in a test machine provides an objective method of describing the laxity and stability characteristics of the implant itself, independent of the knee joint into which it would be implanted. A special fixture was designed and fitted to a Bionix multi-channel loading machine. The test consisted of applying a compressive load, applying a cyclic AP force or internal-external torque, and measuring all of the displacements and rotations. Three different commonly-used TKR's showed widely different constraint characteristics. In the cyclic AP test, along with the cyclic AP displacement, displacements and rotations occurred in the other directions. This indicated that all degrees of freedom should be free to move, otherwise anomalous results would be obtained. The paper concludes with recommendations for standardized constraint tests.

Original languageEnglish (US)
Pages (from-to)341-348
Number of pages8
JournalJournal of Biomechanics
Volume38
Issue number2
DOIs
StatePublished - Feb 1 2005

Fingerprint

Knee prostheses
Knee Replacement Arthroplasties
Torque
Knee Joint
Knee
Direction compound

Keywords

  • TKR constraint
  • TKR kinematics
  • TKR laxity
  • TKR stability
  • TKR testing
  • Total knee replacement (TKR)

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

Measurements of constraint of total knee replacement. / Haider, Hani; Walker, P. S.

In: Journal of Biomechanics, Vol. 38, No. 2, 01.02.2005, p. 341-348.

Research output: Contribution to journalArticle

Haider, Hani ; Walker, P. S. / Measurements of constraint of total knee replacement. In: Journal of Biomechanics. 2005 ; Vol. 38, No. 2. pp. 341-348.
@article{cf9a61f348b449efb604c2ed3e9fb40e,
title = "Measurements of constraint of total knee replacement",
abstract = "Measurement of the constraint of total knee components in a test machine provides an objective method of describing the laxity and stability characteristics of the implant itself, independent of the knee joint into which it would be implanted. A special fixture was designed and fitted to a Bionix multi-channel loading machine. The test consisted of applying a compressive load, applying a cyclic AP force or internal-external torque, and measuring all of the displacements and rotations. Three different commonly-used TKR's showed widely different constraint characteristics. In the cyclic AP test, along with the cyclic AP displacement, displacements and rotations occurred in the other directions. This indicated that all degrees of freedom should be free to move, otherwise anomalous results would be obtained. The paper concludes with recommendations for standardized constraint tests.",
keywords = "TKR constraint, TKR kinematics, TKR laxity, TKR stability, TKR testing, Total knee replacement (TKR)",
author = "Hani Haider and Walker, {P. S.}",
year = "2005",
month = "2",
day = "1",
doi = "10.1016/j.jbiomech.2004.02.014",
language = "English (US)",
volume = "38",
pages = "341--348",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "2",

}

TY - JOUR

T1 - Measurements of constraint of total knee replacement

AU - Haider, Hani

AU - Walker, P. S.

PY - 2005/2/1

Y1 - 2005/2/1

N2 - Measurement of the constraint of total knee components in a test machine provides an objective method of describing the laxity and stability characteristics of the implant itself, independent of the knee joint into which it would be implanted. A special fixture was designed and fitted to a Bionix multi-channel loading machine. The test consisted of applying a compressive load, applying a cyclic AP force or internal-external torque, and measuring all of the displacements and rotations. Three different commonly-used TKR's showed widely different constraint characteristics. In the cyclic AP test, along with the cyclic AP displacement, displacements and rotations occurred in the other directions. This indicated that all degrees of freedom should be free to move, otherwise anomalous results would be obtained. The paper concludes with recommendations for standardized constraint tests.

AB - Measurement of the constraint of total knee components in a test machine provides an objective method of describing the laxity and stability characteristics of the implant itself, independent of the knee joint into which it would be implanted. A special fixture was designed and fitted to a Bionix multi-channel loading machine. The test consisted of applying a compressive load, applying a cyclic AP force or internal-external torque, and measuring all of the displacements and rotations. Three different commonly-used TKR's showed widely different constraint characteristics. In the cyclic AP test, along with the cyclic AP displacement, displacements and rotations occurred in the other directions. This indicated that all degrees of freedom should be free to move, otherwise anomalous results would be obtained. The paper concludes with recommendations for standardized constraint tests.

KW - TKR constraint

KW - TKR kinematics

KW - TKR laxity

KW - TKR stability

KW - TKR testing

KW - Total knee replacement (TKR)

UR - http://www.scopus.com/inward/record.url?scp=10444280073&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10444280073&partnerID=8YFLogxK

U2 - 10.1016/j.jbiomech.2004.02.014

DO - 10.1016/j.jbiomech.2004.02.014

M3 - Article

C2 - 15598462

AN - SCOPUS:10444280073

VL - 38

SP - 341

EP - 348

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 2

ER -