Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control

Hani Haider, Peter Walker, John Desjardins, Gordon Blunn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Simulation of total knee replacement (TKR) is typically achieved by Integrating sliding/rolling motions and loads between the Implant's articulating surfaces during an activity cycle such as walking. Clinically, however, Important variations In implant alignment and duty occur due to variability In patient anatomy/arthritic deformity, compounded by choices or errors in surgical Installation. This study Investigated the effects of the activity cycle severity, frontal plane alignment, relative femoral/tlblal component rotational position, and the tightness of the posterior cruciate ligament (PCL). Seven different (four fixedbearing and three mobile-bearing) cruciate-retaining TKRs with different Inherent constraints were tested on a force-control knee simulator. As well as the ISO standard wave forms for walking, an Enhanced Duty Cycle was used. The resulting anterior-posterior displacements and axial rotations were increased with the Enhanced Duty Cycle. Changing the line of action of the compressive force In the frontal plane (varusvalgus over/under-correction) did not appreciably change the kinematics. Rotating the tibial component shifted the rotational curves In the same direction as the misalignment. The PCL tightness produced the most noticeable effect on kinematics; a tight PCL reduced both displacements and rotations, and a loose PCL did the opposite.

Original languageEnglish (US)
Title of host publicationWear of Articulating Surfaces
Subtitle of host publicationUnderstanding Joint Simulation
PublisherASTM International
Pages3-16
Number of pages14
ISBN (Print)0803134150, 9780803134157
StatePublished - Jan 1 2007
EventSymposium on Wear of Articulating Surfaces: Understanding Joint Simulation - Dallas, TX, United States
Duration: Nov 8 2005Nov 8 2005

Publication series

NameASTM Special Technical Publication
Volume1472 STP
ISSN (Print)0066-0558

Conference

ConferenceSymposium on Wear of Articulating Surfaces: Understanding Joint Simulation
CountryUnited States
CityDallas, TX
Period11/8/0511/8/05

Fingerprint

Knee prostheses
Ligaments
Force control
Kinematics
Bearings (structural)
Simulators

Keywords

  • Knee kinematics
  • Knee simulator
  • Knee surgical technique
  • Mobile bearing knee
  • TKR wear

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Haider, H., Walker, P., Desjardins, J., & Blunn, G. (2007). Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control. In Wear of Articulating Surfaces: Understanding Joint Simulation (pp. 3-16). (ASTM Special Technical Publication; Vol. 1472 STP). ASTM International.

Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control. / Haider, Hani; Walker, Peter; Desjardins, John; Blunn, Gordon.

Wear of Articulating Surfaces: Understanding Joint Simulation. ASTM International, 2007. p. 3-16 (ASTM Special Technical Publication; Vol. 1472 STP).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Haider, H, Walker, P, Desjardins, J & Blunn, G 2007, Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control. in Wear of Articulating Surfaces: Understanding Joint Simulation. ASTM Special Technical Publication, vol. 1472 STP, ASTM International, pp. 3-16, Symposium on Wear of Articulating Surfaces: Understanding Joint Simulation, Dallas, TX, United States, 11/8/05.
Haider H, Walker P, Desjardins J, Blunn G. Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control. In Wear of Articulating Surfaces: Understanding Joint Simulation. ASTM International. 2007. p. 3-16. (ASTM Special Technical Publication).
Haider, Hani ; Walker, Peter ; Desjardins, John ; Blunn, Gordon. / Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control. Wear of Articulating Surfaces: Understanding Joint Simulation. ASTM International, 2007. pp. 3-16 (ASTM Special Technical Publication).
@inproceedings{206ed28f74ac48788a948d1233389188,
title = "Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control",
abstract = "Simulation of total knee replacement (TKR) is typically achieved by Integrating sliding/rolling motions and loads between the Implant's articulating surfaces during an activity cycle such as walking. Clinically, however, Important variations In implant alignment and duty occur due to variability In patient anatomy/arthritic deformity, compounded by choices or errors in surgical Installation. This study Investigated the effects of the activity cycle severity, frontal plane alignment, relative femoral/tlblal component rotational position, and the tightness of the posterior cruciate ligament (PCL). Seven different (four fixedbearing and three mobile-bearing) cruciate-retaining TKRs with different Inherent constraints were tested on a force-control knee simulator. As well as the ISO standard wave forms for walking, an Enhanced Duty Cycle was used. The resulting anterior-posterior displacements and axial rotations were increased with the Enhanced Duty Cycle. Changing the line of action of the compressive force In the frontal plane (varusvalgus over/under-correction) did not appreciably change the kinematics. Rotating the tibial component shifted the rotational curves In the same direction as the misalignment. The PCL tightness produced the most noticeable effect on kinematics; a tight PCL reduced both displacements and rotations, and a loose PCL did the opposite.",
keywords = "Knee kinematics, Knee simulator, Knee surgical technique, Mobile bearing knee, TKR wear",
author = "Hani Haider and Peter Walker and John Desjardins and Gordon Blunn",
year = "2007",
month = "1",
day = "1",
language = "English (US)",
isbn = "0803134150",
series = "ASTM Special Technical Publication",
publisher = "ASTM International",
pages = "3--16",
booktitle = "Wear of Articulating Surfaces",

}

TY - GEN

T1 - Effects of patient and surgical alignment variables on kinematics in TKR simulation under force-control

AU - Haider, Hani

AU - Walker, Peter

AU - Desjardins, John

AU - Blunn, Gordon

PY - 2007/1/1

Y1 - 2007/1/1

N2 - Simulation of total knee replacement (TKR) is typically achieved by Integrating sliding/rolling motions and loads between the Implant's articulating surfaces during an activity cycle such as walking. Clinically, however, Important variations In implant alignment and duty occur due to variability In patient anatomy/arthritic deformity, compounded by choices or errors in surgical Installation. This study Investigated the effects of the activity cycle severity, frontal plane alignment, relative femoral/tlblal component rotational position, and the tightness of the posterior cruciate ligament (PCL). Seven different (four fixedbearing and three mobile-bearing) cruciate-retaining TKRs with different Inherent constraints were tested on a force-control knee simulator. As well as the ISO standard wave forms for walking, an Enhanced Duty Cycle was used. The resulting anterior-posterior displacements and axial rotations were increased with the Enhanced Duty Cycle. Changing the line of action of the compressive force In the frontal plane (varusvalgus over/under-correction) did not appreciably change the kinematics. Rotating the tibial component shifted the rotational curves In the same direction as the misalignment. The PCL tightness produced the most noticeable effect on kinematics; a tight PCL reduced both displacements and rotations, and a loose PCL did the opposite.

AB - Simulation of total knee replacement (TKR) is typically achieved by Integrating sliding/rolling motions and loads between the Implant's articulating surfaces during an activity cycle such as walking. Clinically, however, Important variations In implant alignment and duty occur due to variability In patient anatomy/arthritic deformity, compounded by choices or errors in surgical Installation. This study Investigated the effects of the activity cycle severity, frontal plane alignment, relative femoral/tlblal component rotational position, and the tightness of the posterior cruciate ligament (PCL). Seven different (four fixedbearing and three mobile-bearing) cruciate-retaining TKRs with different Inherent constraints were tested on a force-control knee simulator. As well as the ISO standard wave forms for walking, an Enhanced Duty Cycle was used. The resulting anterior-posterior displacements and axial rotations were increased with the Enhanced Duty Cycle. Changing the line of action of the compressive force In the frontal plane (varusvalgus over/under-correction) did not appreciably change the kinematics. Rotating the tibial component shifted the rotational curves In the same direction as the misalignment. The PCL tightness produced the most noticeable effect on kinematics; a tight PCL reduced both displacements and rotations, and a loose PCL did the opposite.

KW - Knee kinematics

KW - Knee simulator

KW - Knee surgical technique

KW - Mobile bearing knee

KW - TKR wear

UR - http://www.scopus.com/inward/record.url?scp=51649091455&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=51649091455&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:51649091455

SN - 0803134150

SN - 9780803134157

T3 - ASTM Special Technical Publication

SP - 3

EP - 16

BT - Wear of Articulating Surfaces

PB - ASTM International

ER -