scholarly journals Can the frontal tibiofemoral alignment be assessed on anteroposterior knee radiographs?

2016 ◽  
Vol 17 (4) ◽  
pp. 339-343
Author(s):  
M. Sgroi ◽  
M. Faschingbauer ◽  
H. Reichel ◽  
T. Kappe
Keyword(s):  
Tibiofemoral Alignment

scholarly journals Femoral Component Alignment Boundaries for Tibia First Gap Balancing using Digital Tensioning Tool

10.29007/9p46 ◽  
2020 ◽  
Author(s):  
Edgar Wakelin ◽  
Sami Shalhoub ◽  
Jeffrey Lawrence ◽  
John Keggi ◽  
Jeffrey DeClaire ◽  
...  
Keyword(s):  
Los Angeles ◽  
Femoral Component ◽  
Patient Outcomes ◽  
Component Alignment ◽  
Small Deviations ◽  
Gap Balancing ◽  
Axial Alignment ◽  
Outcome Scores ◽  
Total Knee ◽  
Tibiofemoral Alignment

Achieving a balanced knee is a critical aspect of Total Knee Arthroplasty (TKA). Coronal and axial boundaries for femoral component placement to achieve balance however, are not well defined. Our aim is to investigate the effect of femoral component and long leg coronal and axial alignment on patient outcomes when using a tibia-first gap balancing technique.All surgeries were performed using the OMNIBotics robot-assisted TKA platform and BalanceBot device. A total of 197 patients were prospectively enrolled into this study and received TKA surgery using the OMNIBotics platform and completed 1-year KOOS outcome scores. Femoral component and tibiofemoral alignment were categorized as inliers or outliers in the coronal and axial planes. Knee Injury and Osteoarthritis Outcome Score (KOOS), and University of California at Los Angeles Activity Scale (UCLA) was collected at 1-year post-op.No significant differences were found between the KOOS subscores or UCLA outcome and femoral coronal or tibiofemoral coronal and axial alignment. Significant differences were found between the KOOS pain and sports sub-scores and femoral axial alignment (∆ = 5.4, p = 0.007, ∆ = 8.3, p = 0.03 respectively), in which outlier femoral rotation reported higher scores.Component alignment limits for improved survival and patient outcomes are a source of ongoing debate. The data presented here indicates that when utilizing a tibia-first gap balancing technique, small deviations outside of traditional ±3°alignment boundaries did not negatively affect KOOS or UCLA outcomes, indicating balance may have a stronger link to patient outcome than alignment.

Mediolateral force distribution at the knee joint shifts across activities and is driven by tibiofemoral alignment

2017 ◽  
Vol 99-B (6) ◽  
pp. 779-787 ◽  
Author(s):  
I. Kutzner ◽  
A. Bender ◽  
J. Dymke ◽  
G. Duda ◽  
P. von Roth ◽  
...  
Keyword(s):  
Knee Joint ◽  
Force Distribution ◽  
Tibiofemoral Alignment

scholarly journals Frontal plane tibio-femoral alignment and its association with knee pain among patients with early osteoarthritis of the knee in a population presenting to a tertiary hospital in South India

2017 ◽  
Vol 4 (1) ◽  
pp. 79 ◽  
Author(s):  
M. Koteshwar Rao ◽  
P. Lakshmi Narayana Reddy
Keyword(s):  
Knee Pain ◽  
Statistical Significance ◽  
Frontal Plane ◽  
Positive Correlation ◽  
Vas Score ◽  
Weak Positive Correlation ◽  
Q Angle ◽  
Tibiofemoral Alignment ◽  
The Mean ◽  
Early Oa

<p class="abstract"><strong>Background:</strong> <span lang="EN-IN">Frontal plane knee malalignment may increase the progression of knee osteoarthritis (OA) and worsen functional capacity</span><span lang="EN-IN">.</span></p><p class="abstract"><strong>Methods:</strong> <span lang="EN-IN">In our study, the aim was to find the correlation of frontal plane tibiofemoral alignment with knee pain in early OA knee patients. After meeting the inclusion and exclusion criteria, 195 patients with 314 knees (104 females, 91 males) were studied. Clinical and radiological measurements of frontal plane tibiofemoral alignment, using landmark of hip, knee, and ankle, compared with knee pain</span>.<strong></strong></p><p class="abstract"><strong>Results:</strong> <span lang="EN-IN">The accepted Statistical significance was p&lt;0.05. Patients with 130 knees (41%) were normal alignment, and 184 knees (59%) were abnormal alignment. The mean±SD age in our study was 54.6±8.9 years. The mean±SD BMI in our study to be 25.86±1.96. Mean±SD Q-angle in patients with normal and abnormal alignment was 14.76±1.54 and 14.63±1.9 respectively. There is statistically no significant correlation between BMI and VAS score (r=0.054, p=0.344). Means±SD of mLDFA, mMPTA, mTFA, aTFA, and JOA were 88.86±2.73, 84.96±3.00, 5.96±4.01, 4.55±3.67, and 2.37±1.88 respectively. JOA and mTFA had statistically significant weak positive correlation with VAS (knee pain) score, (r=0.281) (p=0.000) and (r=0.236) (p=0.000) respectively. The rest of the angles were not had statistically significant correlation with VAS score. The mTFA had statistically significant weak positive correlation with all the angles. We found that Frontal plane tibiofemoral alignment correlates with knee pain in patients with early OA</span><span lang="EN-IN">. </span></p><p class="abstract"><strong>Conclusions:</strong> <span lang="EN-IN">The mTFA may be considered one important criterion in designing treatment and planning surgery for patients with primary osteoarthritis. The Q angle acts as a good alternative clinical tool in assessing frontal plane alignment. BMI was not correlating with knee pain (VAS score)</span><span lang="EN-IN">.</span></p>

Method to Determine the Effect of the Frontal Plane Tibiofemoral Knee Angle on the Varus-Valgus Moment at the Knee During Stance and Gait

2008 ◽  
Author(s):  
Paul K. Canavan ◽  
Nicholas H. Yang ◽  
Hamid Nayeb-Hashemi
Keyword(s):  
Load Distribution ◽  
Frontal Plane ◽  
Element Model ◽  
Analysis Procedure ◽  
Stress And Strain ◽  
Knee Angle ◽  
Knee Cartilage ◽  
Tibiofemoral Angle ◽  
Tibiofemoral Alignment ◽  
Biomechanical Factors

Osteoarthritis (OA) is a degenerative disease of articular cartilage that affects millions of people [1]. Local biomechanical factors may severely affect initiation and progression of OA due to changes in loading conditions at the cartilage. The frontal plane tibiofemoral alignment effects the varus/valgus moment which could increase the overall loading at the knee. Biomechanical studies have reported that the varus moment is a key determinant in the load distribution at the knee [2, 3] and has been linked to OA progression [4, 5]. A normal knee will have a tibiofemoral angle approximately 7° valgus [6]. Deviation from this angle leads to a knee joint with a varus or valgus condition. In this investigation, a motion analysis procedure was developed to determine the affect of the frontal plane tibiofemoral angle on the force and moment reactions at the knee. The results of these methods could be utilized in a subject specific finite element model to determine the stress and strain at the knee cartilage and to suggest measures to prevent OA.

scholarly journals How tibiofemoral alignment and contact locations affect predictions of medial and lateral tibiofemoral contact forces

2015 ◽  
Vol 48 (4) ◽  
pp. 644-650 ◽  
Author(s):  
Zachary F. Lerner ◽  
Matthew S. DeMers ◽  
Scott L. Delp ◽  
Raymond C. Browning
Keyword(s):  
Contact Forces ◽  
Tibiofemoral Alignment

Familial influence on tibiofemoral alignment

2009 ◽  
Vol 69 (3) ◽  
pp. 542-545 ◽  
Author(s):  
Abdurrahman Tufan ◽  
Ingrid Meulenbelt ◽  
Jessica Bijsterbosch ◽  
Herman M Kroon ◽  
Sita M A Bierma-Zeinstra ◽  
...  
Keyword(s):  
Familial Aggregation ◽  
Joint Involvement ◽  
Sibling Pairs ◽  
Tibiofemoral Angle ◽  
Knee Oa ◽  
History Of ◽  
Tibiofemoral Alignment ◽  
The Mean ◽  
Heritability Estimates ◽  
The Right

BackgroundTibiofemoral alignment has a role in knee osteoarthritis (OA), but which factors contribute to alignment is unknown.ObjectiveTo investigate familial aggregation of tibiofemoral alignment in participants of the GARP (Genetics ARthrosis and Progression) study.MethodsThe tibiofemoral anatomical angle on semiflexed knee radiographs was measured in sibling pairs (mean age 60 years, 81% women) with primary OA with multiple joint involvement. Radiographic OA was assessed according to the Kellgren–Lawrence (KL) method. Heritability estimates of the tibiofemoral angle were calculated by comparing twice the between-sibling variance with the total variance; adjustments were made for age, gender, body mass index, history of meniscectomy, lower limb fracture and in analyses including all knees, for KL score.Results360 subjects representing 180 families were studied. The mean (SD) tibiofemoral angle of right and left knees in the probands was 182.7 (2.9)° and 182.8 (2.6)°, respectively; similar angles were measured in the siblings. Radiographic knee OA (KL score ≥2) was present in 27% of the knees. Stratified analyses in sib pairs with non-osteoarthritic right or left knees showed adjusted heritability estimates of the tibiofemoral angle of the right and left knees of 0.42 (95% CI 0.02 to 0.82) and 0.56 (95% CI 0.19 to 0.93). In addition, adjusted heritability estimates of the tibiofemoral angle in all right and left knees were calculated, being 0.48 (95% CI 0.18 to 0.78) and 0.50 (95% CI 0.21 to 0.79), respectively.ConclusionThe alignment of the tibiofemoral joint is influenced by familial factors, implying that tibiofemoral malalignment may add to the genetic predisposition for knee OA development. These results need to be confirmed in other study populations.

Frontal Plane Tibiofemoral Alignment is Strongly Related to Compartmental Knee Joint Contact Forces and Muscle Control Strategies During Stair Ascent

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Hunter J. Bennett ◽  
Joshua T. Weinhandl ◽  
Kristina Fleenor ◽  
Songning Zhang
Keyword(s):  
Knee Joint ◽  
Control Strategies ◽  
Frontal Plane ◽  
Contact Forces ◽  
Muscle Forces ◽  
Muscle Control ◽  
Knee Alignment ◽  
Joint Contact ◽  
Tibiofemoral Alignment ◽  
Weight Acceptance

Static frontal plane tibiofemoral alignment is an important factor in dynamic knee alignment and knee adduction moments (KAMs). However, little is known about the relationship between alignment and compartment contact forces or muscle control strategies. The purpose of this study was to estimate medial (MCF) and lateral (LCF) compartment knee joint contact forces and muscle forces during stair ascent using a musculoskeletal model implementing subject-specific knee alignments. Kinematic and kinetic data from 20 healthy individuals with radiographically confirmed varus or valgus knee alignments were simulated using alignment specific models to predict MCFs and LCFs. Muscle forces were determined using static optimization. Independent samples t-tests compared contact and muscle forces between groups during weight acceptance and during pushoff. The varus group exhibited increased weight acceptance peak MCFs, while the valgus group exhibited increased pushoff peak LCFs. The varus group utilized increased vasti muscle forces during weight acceptance and adductor forces during pushoff. The valgus group utilized increased abductor forces during pushoff. The alignment-dependent contact forces provide evidence of the significance of frontal plane knee alignment in healthy individuals, which may be important in considering future knee joint health. The differing muscle control strategies between alignments detail-specific neuromuscular responses to control frontal plane knee loads.

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