Frontal plane corrective ability of a new unloader orthosis for medial compartment of the knee

2013 ◽  
Vol 37 (6) ◽  
pp. 481-488 ◽  
Author(s):  
Mokhtar Arazpour ◽  
Monireh Ahmadi Bani ◽  
Stephen William Hutchins ◽  
Richard Keith Jones ◽  
Monireh Habibi Babadi
Keyword(s):  
Knee Osteoarthritis ◽  
Frontal Plane ◽  
Medial Compartment ◽  
Osteoarthritis Of The Knee ◽  
Single Subject ◽  
Valgus Knee ◽  
Knee Model ◽  
Volunteer Subject ◽  
Knee Orthosis

Background: Patients with medial compartment osteoarthritis of the knee suffer from pain and stiffness. However, current unloader braces are not being used for extended periods by knee osteoarthritis patients due to interface problems, so compliance is an issue. The aim of this study was to design a new bespoke orthosis that could be comfortable to wear while also providing the required correction to reduce medial compartment loading. Case Description and Methods: A new knee orthosis design was initially tested for its frontal plane correction of knee varus using a surrogate knee model. It was then assessed by a volunteer subject with grade 2 medial compartment knee osteoarthritis using a static standing radiograph. Findings and Outcomes: When fitted to the surrogate knee model, the brace corrected the knee from 10° of varus to neutral alignment in the frontal plane. When worn in situ during static stance on the affected leg of the volunteer patient, it corrected the knee by 6° to a less varus position. Conclusion: The orthosis provided frontal plane correction of the knee during static standing. It could therefore prove to be suitable for use by knee osteoarthritis patients. Clinical relevance This new custom unloader knee orthosis produced a more valgus knee alignment by adjusting the pneumatic components attached to the thigh and leg shells. During static stance, it corrected frontal plane varus knee rotation by 6° in a single subject with knee osteoarthritis.

scholarly journals Control of frontal plane knee laxity during gait in patients with medial compartment knee osteoarthritis

2004 ◽  
Vol 12 (9) ◽  
pp. 745-751 ◽  
Author(s):  
Michael D. Lewek ◽  
Katherine S. Rudolph ◽  
Lynn Snyder-Mackler
Keyword(s):  
Knee Osteoarthritis ◽  
Frontal Plane ◽  
Knee Laxity ◽  
Medial Compartment

scholarly journals Freedom in Osteoarthritis of the Knee

2022 ◽  
Vol 12 (2) ◽  
pp. 839
Author(s):  
Wangdo Kim ◽  
Emir A. Vela
Keyword(s):  
Knee Osteoarthritis ◽  
Psychosocial Aspects ◽  
Degree Of Freedom ◽  
Medial Compartment ◽  
Osteoarthritis Of The Knee ◽  
Special Configuration ◽  
Alternative Approach ◽  
Whole Person ◽  
Knee Abduction ◽  
Surrogate Measure

The first peak of the external knee abduction moment (KAM) is often used as a surrogate measure of the medial compartment loading and has been correlated with pain and progression of knee osteoarthritis (OA). As a result, reducing the KAM is often the target of conservative interventions. OA should be considered as a “Whole Person” disease, including ecological psychosocial aspects. Scientists have developed gait alteration strategies to reduce the KAM. They attempted to force into a new position any particular part without reference to the pattern of the whole. We propose an alternative approach: in the vicinity of a special configuration of the knee, some or all of the components of the knee become overloaded. This study has shown that when six lines $1′,$2′,$3′,$4′,$5′,$6′ are so situated that forces acting along them equilibrate when applied to one degree of freedom, 1° F knee, a certain determinant vanishes. We wish to define the six lines as the knee complex in involution by virtue of some constraint upon the knee.

Combined Effects of a Valgus Knee Brace and Lateral Wedge Insole on Walking in Patients with Medial Compartment Knee Osteoarthritis

2018 ◽  
Vol 30 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Fatemeh Mirzaei ◽  
Mokhtar Arazpour ◽  
Roshanak Baghei Roodsari ◽  
Mahmood Bahramizadeh ◽  
Mohammad Ali Mardani
Keyword(s):  
Knee Osteoarthritis ◽  
Medial Compartment ◽  
Valgus Knee ◽  
Combined Effects ◽  
Knee Brace

A Meta-Analysis of Knee Orthosis Uptake in Reducing Pain in Patients with Knee Osteoarthritis

2020 ◽  
Author(s):  
Atika Febri Anggriani ◽  
◽  
Agus Kristiyanto ◽  
Setyo Sri Rahardjo ◽  
◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Knee Osteoarthritis ◽  
Controlled Trial ◽  
Meta Analysis ◽  
Knee Adduction Moment ◽  
Valgus Knee ◽  
Randomized Controlled ◽  
Central Java ◽  
Keywords Osteoarthritis ◽  
Knee Orthosis

ABSTRACT Background: Osteoarthritis (OA) of knee joint is a degenerative disease that results in decreased function and pain. Orthotic devices can reduce knee adduction moment, pain, and improve function in knee OA. The purpose of this study was to examine knee orthosis uptake in reducing pain in patients with knee osteoarthritis. Subjects and Method: A meta-analysis and systematic review was conducted by search published articles from PubMed, Science Direct, Google Sscholar, Mendeley, and Clinical key databases. Keywords used “knee orthosis” OR “KO” AND “valgus knee brace” AND “brace” AND “knee support” AND “valgus knee support” AND “osteoarthritis” AND “patellofemoral osteoarthritis” AND “knee pain” AND “effect knee orthosis for osteoarthritis” AND “randomized controlled trial”. The inclusion criteria were full text and using randomized controlled trial study design. The articles were selected by PRISMA flow chart and the quantitative data were analyzed by Revman 5.3. Results: 6 studies reported that knee orthosis uptake reduces pain in patients with knee osteoarthritis (Mean Difference= -0.53; 95% CI= -1.39 to 0.33; p= 0.230) with heterogeneity I2= 95%. Conclusion: Knee orthosis uptake reduces pain in patients with knee osteoarthritis. Keywords: osteoarthritis, pain, knee orthosis, knee valgus brace Correspondence: Atika Febri Anggriani. Masters Program in Public Health, Universitas Sebelas Maret. Jl. Ir. Sutami 36A, Surakarta 57126, Central Java. Email: [email protected]. Mobile: 085728794960. DOI: https://doi.org/10.26911/the7thicph.05.44

The influence of a bespoke unloader knee brace on gait in medial compartment osteoarthritis: A pilot study

2014 ◽  
Vol 38 (5) ◽  
pp. 379-386 ◽  
Author(s):  
Mokhtar Arazpour ◽  
Stephen W Hutchins ◽  
Monireh A Bani ◽  
Sarah Curran ◽  
Andrey Aksenov
Keyword(s):  
Knee Osteoarthritis ◽  
Range Of Motion ◽  
Sagittal Plane ◽  
Step Length ◽  
Medial Compartment ◽  
Knee Adduction Moment ◽  
Medial Knee ◽  
Medial Compartment Osteoarthritis ◽  
Medial Knee Osteoarthritis ◽  
Knee Orthosis

Background:Patients suffering from mild-to-moderate medial compartment knee osteoarthritis may be treated with an unloader knee orthosis. However, compliance has been shown to be an issue with such devices.Objectives:The aim of this study was to identify the effects of a new design of knee unloader orthosis on specific gait parameters in patients with mild-to-moderate medial knee osteoarthritis.Methods:The gait of seven patients was assessed in two conditions: without an orthosis and when wearing a new design of unloader knee orthosis. Gait analysis was performed to determine alterations to the adduction moment, speed of walking, step length, cadence and knee sagittal plane range of motion during ambulation for the two test conditions.Results:The knee adduction moment was significantly reduced ( p = 0.001), and the speed of walking significantly increased ( p < 0.001) when wearing the orthosis. However, a reduction in knee range of motion ( p = 0.002) and an increase in step length ( p < 0.001) were observed with the orthosis donned. Cadence was not significantly altered ( p = 0.504).Conclusion:The use of a new design of unloader knee orthosis as a conservative treatment approach for patients with mild-to-moderate medial compartment osteoarthritis appears warranted.Clinical relevanceVarious conservative modalities have been used to reduce pain and improve function in medial compartment osteoarthritis. A new design of an unloader knee orthosis has been developed and is shown to have immediate benefits in patients with mild medial knee osteoarthritis.

Comparison of the efficacy of laterally wedged insoles and bespoke unloader knee orthoses in treating medial compartment knee osteoarthritis

2012 ◽  
Vol 37 (1) ◽  
pp. 50-57 ◽  
Author(s):  
Mokhtar Arazpour ◽  
Monireh Ahmadi Bani ◽  
Maryam Maleki ◽  
Farhad Tabatabai Ghomshe ◽  
Reza Vahab Kashani ◽  
...  
Keyword(s):  
Knee Osteoarthritis ◽  
Range Of Motion ◽  
Visual Analog Scale Score ◽  
Step Length ◽  
Medial Compartment ◽  
Analog Scale ◽  
Knee Oa ◽  
Gait Parameters ◽  
Quasi Experimental ◽  
Knee Orthosis

Background: Patients suffering from medial compartment knee osteoarthritis (OA) may be treated with unloader knee orthoses or laterally wedged insoles. Objectives: The aim of this study was to identify and compare the effects of them on the gait parameters and pain in these patients. Study Design: Quasi-experimental. Methods: Volunteer subjects with medial compartment knee OA ( n = 24, mean age 59.29 ± 2.23 years) were randomly assigned to two separate groups and evaluated when wearing an unloader knee orthosis or insoles incorporating a 6° lateral wedge. Testing was performed at baseline and after six weeks of each orthosis use. A visual analog scale score was used to assess pain and gait analysis was utilized to determine gait parameters. Results: Both orthoses improved all parameters compared to the baseline condition ( p = 0.000). However, no significant differences in pain ( p = 0.649), adduction moment ( p = 0.205), speed of walking ( p = 0. 056) or step length ( p = 0.687) were demonstrated between them. The knee range of motion ( p = 0.000) were significantly different between the two interventions. Conclusion: Both orthoses reduced knee pain. Maximum knee range of motion was increased by both interventions although it was 3 degrees less when wearing the knee orthosis. Clinical relevance Both orthoses reduce pain and improve gait anomalies in medial compartment knee OA. Our results suggest a laterally wedged insole can be an alternative conservative approach to unloader knee orthosis for treating symptoms of medial compartment knee OA.

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