Application of a Novel Measure of In Vivo Knee Joint Laxity

2016 ◽  
Vol 138 (10) ◽  
Author(s):  
J. C. Küpper ◽  
L. Westover ◽  
R. Frayne ◽  
J. L. Ronsky
Keyword(s):  
Knee Joint ◽  
Normal Subjects ◽  
Joint Laxity ◽  
Subject Position ◽  
Future Design ◽  
Knee Loading ◽  
Knee Joint Laxity ◽  
Kt 1000 ◽  
Ligament Laxity

Current measures of knee joint laxity, such as those found clinically using the KT-2000 arthrometer, are not highly repeatable or reliable by Huber et al. (1997, “Intratester and Intertester Reliability of the KT-1000 Arthrometer in the Assessment of Posterior Laxity of the Knee,” Am. J. Sports Med., 25(4), pp. 479–485). In this study, a noninvasive in vivo magnetic resonance (MR) imaging-based measure of laxity, the knee loading apparatus (KLA) with anterior positioning frame, was evaluated with five normal subjects (repeatability study, n = 3). Effects of hormones and muscle guarding were considered. When compared to the KT-2000, the KLA was found to be more precise (±0.33 mm versus ±1.17 mm) but less reliable (Cronbach's alpha > 0.70 in 0/8 versus 5/8 load levels). Improved control of the initial subject position is recommended for future design iterations. The KLA shows promise as an accurate and reliable tool for measuring in vivo joint and ligament laxity.

Quantification of In Vivo Laxity in the ACL and Individual Knee Joint Structures

2011 ◽  
Author(s):  
Lindsey M. Westover ◽  
Jessica C. Küpper ◽  
Janet L. Ronsky
Keyword(s):  
Knee Joint ◽  
Tissue Injury ◽  
Cruciate Ligament ◽  
Soft Tissue Injury ◽  
Joint Laxity ◽  
Low Grade ◽  
Joint Movement ◽  
Joint Hypermobility Syndrome ◽  
Knee Joint Laxity

In biomechanical terms, passive joint laxity is a measure of joint movement within the constraints of ligaments, capsule, and cartilage [1] when an external force is applied to the joint during a state of muscular relaxation. Excessive knee joint laxity (reduced stiffness) can result from soft tissue injury, such as a ligament tear, or from genetic factors such as benign joint hypermobility syndrome, and can predispose the joint to instability including recurrent dislocations, and low-grade inflammatory arthritis [2]. A novel technique for in vivo measurement of 3D knee joint laxity using magnetic resonance (MR) imaging with a custom knee loading apparatus (KLA) has been developed in our research group [3]. Gross joint laxity is predicted based on joint displacement in response to an applied anterior tibial load. To better understand the link between laxity and instability, and to advance this technique for clinical applications, the laxity of individual joint structures, such as the anterior cruciate ligament (ACL) must be quantified.

IN VIVO MEASUREMENT OF KNEE JOINT LAXITY

1978 ◽  
pp. 179-181
Author(s):  
William G. Clancy ◽  
Rajesh G. Narechania ◽  
Charles G. Roland
Keyword(s):  
Knee Joint ◽  
Joint Laxity ◽  
In Vivo Measurement ◽  
Knee Joint Laxity

Three-dimensional in vivo knee joint laxity under torsional loading

2006 ◽  
Vol 39 ◽  
pp. S497
Author(s):  
A. Hemmerich ◽  
W. van der Merwe ◽  
C.L. Vaughan
Keyword(s):  
Knee Joint ◽  
Three Dimensional ◽  
Joint Laxity ◽  
Torsional Loading ◽  
Knee Joint Laxity

scholarly journals A Novel Measure of In-Vivo Knee Joint Laxity

2007 ◽  
Author(s):  
Jessica C. Küpper ◽  
Janet L. Ronsky ◽  
Richard Frayne ◽  
Ion Robu ◽  
Barbara Loitz-Ramage ◽  
...  
Keyword(s):  
Knee Joint ◽  
Tissue Injury ◽  
Cruciate Ligament ◽  
Soft Tissue Injury ◽  
Joint Hypermobility ◽  
Joint Laxity ◽  
Joint Hypermobility Syndrome ◽  
Joint Injury ◽  
Knee Joint Laxity

Knee joint laxity can result from soft tissue injury, such as an anterior cruciate ligament (ACL) tear, or genetic factors such as joint hypermobility syndrome (JHS). The degree of a subject’s knee laxity along a continuous spectrum depends on the mechanical properties of the structures, and increased motion that typically follows joint injury. At some threshold along the continuum, instability becomes pathologic and the risk of further joint injury increases.

scholarly journals A novel non-invasive method for measuring knee joint laxity in four dof: In vitro proof-of-concept and validation

2019 ◽  
Vol 82 ◽  
pp. 62-69 ◽  
Author(s):  
D. Pedersen ◽  
V. Vanheule ◽  
R. Wirix-Speetjens ◽  
O. Taylan ◽  
HP. Delport ◽  
...  
Keyword(s):  
Knee Joint ◽  
Joint Laxity ◽  
Proof Of Concept ◽  
Non Invasive ◽  
Knee Joint Laxity ◽  
Invasive Method

The Relationship Between Early-Stage Knee Osteoarthritis and Lower-Extremity Alignment, Joint Laxity, and Subjective Scores of Pain, Stiffness, and Function

2016 ◽  
Vol 25 (3) ◽  
pp. 213-218
Author(s):  
Charlie A. Hicks-Little ◽  
Richard D. Peindl ◽  
Tricia J. Hubbard-Turner ◽  
Mitchell L. Cordova
Keyword(s):  
Knee Joint ◽  
Lower Extremity ◽  
Knee Osteoarthritis ◽  
Outcome Measures ◽  
Early Stage ◽  
Joint Laxity ◽  
Knee Oa ◽  
Lower Extremity Alignment ◽  
Knee Joint Laxity ◽  
And Function

Context:Knee osteoarthritis (OA) is a debilitating disease that affects an estimated 27 million Americans. Changes in lowerextremity alignment and joint laxity have been found to redistribute the medial and/or lateral loads at the joint. However, the effect that changes in anteroposterior knee-joint laxity have on lower-extremity alignment and function in individuals with knee OA remains unclear.Objective:To examine anteroposterior knee-joint laxity, lower-extremity alignment, and subjective pain, stiffness, and function scores in individuals with early-stage knee OA and matched controls and to determine if a relationship exists among these measures.Design:Case control.Setting:Sports-medicine research laboratory.Participants:18 participants with knee OA and 18 healthy matched controls.Intervention:Participants completed the Western Ontario McMaster (WOMAC) osteoarthritis questionnaire and were tested for total anteroposterior knee-joint laxity (A-P) and knee-joint alignment (ALIGN).Main Outcome Measures:WOMAC scores, A-P (mm), and ALIGN (°).Results:A significant multivariate main effect for group (Wilks’ Λ = 0.30, F7,26 = 8.58, P < .0001) was found. Knee-OA participants differed in WOMAC scores (P < .0001) but did not differ from healthy controls on ALIGN (P = .49) or total A-P (P = .66). No significant relationships were identified among main outcome measures.Conclusion:These data demonstrate that participants with early-stage knee OA had worse pain, stiffness, and functional outcome scores than the matched controls; however, ALIGN and A-P were no different. There was no association identified among participants’ subjective scores, ALIGN, or A-P measures in this study.

Clinically Assessed Knee Joint Laxity as a Predictor for Reconstruction after an Anterior Cruciate Ligament Injury

2008 ◽  
Vol 36 (8) ◽  
pp. 1528-1533 ◽  
Author(s):  
Ioannis Kostogiannis ◽  
Eva Ageberg ◽  
Paul Neuman ◽  
Leif E. Dahlberg ◽  
Thomas Fridén ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Anterior Cruciate Ligament Injury ◽  
Cruciate Ligament ◽  
Joint Laxity ◽  
Ligament Injury ◽  
Knee Joint Laxity ◽  
Anterior Cruciate

scholarly journals Changes in serum collagen markers, IGF-I, and Knee joint laxity across the menstrual cycle

2012 ◽  
Vol 30 (9) ◽  
pp. 1405-1412 ◽  
Author(s):  
Sandra J. Shultz ◽  
Laurie Wideman ◽  
Melissa M. Montgomery ◽  
Kathleen N. Beasley ◽  
Bradley C. Nindl
Keyword(s):  
Menstrual Cycle ◽  
Knee Joint ◽  
Joint Laxity ◽  
Knee Joint Laxity ◽  
Igf I ◽  
Serum Collagen ◽  
Collagen Markers
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