Frontal plane alignment: An imageless method to predict the mechanical femoral–tibial angle (mFTA) based on functional determination of joint centres and axes

Kornaropoulos, Evgenios; Taylor, William R.; Duda, Georg N.; Ehrig, Rainald; Matziolis, Georg; Müller, Michael; Wassilew, Georgi I.; Asbach, Patrick; Perka, Carsten; Heller, Markus O.

doi:10.1016/j.gaitpost.2009.10.006

Cited by 15 publications

(8 citation statements)

References 29 publications

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“…Moreover, despite possible inter-observer variability in marker placement, a high degree of reliability has been demonstrated in both segment lengths and in the quality of joint identification (using the SCoRE residual [23,24]). Furthermore, this functional approach can also offer access to accurate postural information (lower limb alignment), agreeing better with radiological findings than regression techniques [21].…”

Section: Discussionmentioning

confidence: 86%

“…1), which has been described previously [21], consisted of a minimum of four reflective markers attached to the skin of each segment (pelvis, thigh, shank and foot) of the lower limb using double sided tape. Additional markers were placed on specific bone landmarks (via palpation); for the pelvis, the right anterior superior iliac spine (RASIS), left anterior superior iliac spine (LASIS), right posterior superior iliac spine (RPSIS) and left posterior superior iliac spine (LPSIS); for the knee at the medial and lateral epicondyles; and for the ankle on the medial and lateral malleoli.…”

Section: Marker Protocolmentioning

confidence: 99%

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Repeatability and reproducibility of OSSCA, a functional approach for assessing the kinematics of the lower limb

et al. 2010

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Section: Discussionmentioning

confidence: 86%

Section: Marker Protocolmentioning

confidence: 99%

Repeatability and reproducibility of OSSCA, a functional approach for assessing the kinematics of the lower limb

et al. 2010

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“…Despite all care taken in marker placement on subjects and in ensuring model scaling errors were minimized, a 4° bias between marker‐based and radiographic static alignment measures occurred (Table ). In our high‐BMI subjects this result was likely due to disparities in hip‐joint center location, an important factor for accurately determining alignment . Bias in marker‐based dynamic alignment measures can be variable .…”

Section: Discussionmentioning

confidence: 90%

Musculoskeletal loading in the symptomatic and asymptomatic knees of middle‐aged osteoarthritis patients

Sritharan

Lin

Richardson

et al. 2016

Journal Orthopaedic Research

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This study quantified the contributions by muscles, gravity, and inertia to the tibiofemoral compartment forces in the symptomatic (SYM) and asymptomatic (ASYM) limbs of varus mal-aligned medial knee osteoarthritis (OA) patients, and compared the results with healthy controls (CON). Muscle forces and tibiofemoral compartment loads were calculated using gait data from 39 OA patients and 15 controls aged 49 ± 7 years. Patients exhibited lower knee flexion angle, higher hip abduction, and knee adduction angles, lower internal knee flexion torque but higher external knee adduction moment. Muscle forces were highest in CON except hamstrings, which was highest in SYM. ASYM muscle forces were lowest for biceps femoris short head and gastrocnemius but otherwise intermediate between SYM and CON. In all subjects, vasti, hamstrings, gastrocnemius, soleus, gluteus medius, gluteus maximus, and gravity were the largest contributors to medial compartment force (MCF). Inertial contributions were negligible. Highest MCF was found in SYM throughout stance. Small increases in contributions from hamstrings, gluteus maximus, gastrocnemius, and gravity at the first peak; soleus and rectus femoris at the second peak; and soleus, gluteus maximus, gluteus medius, and gravity during mid-stance summed to produce significantly higher total MCF. Compared to CON, the ASYM limb exhibited similar peak MCF but higher mid-stance MCF. In patients, diminished non-knee-spanning muscle forces did not produce correspondingly diminished MCF contributions due to the influence of mal-alignment. Our findings emphasize consideration of muscle function, lower-limb alignment, and mid-stance loads in developing interventions for OA, and inclusion of the asymptomatic limb in clinical assessments. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:321-330, 2017.

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“…Limb alignment in the coronal plane was calculated using the marker data, saving the potential radiation dose associated with x-rays [20]. Other authors have previously demonstrated good correlation between limb alignment measured using radiographic and marker-based techniques [22], [23].…”

Section: Methodsmentioning

confidence: 99%

Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

Metcalfe¹,

Stewart²,

Postans³

et al. 2017

Gait & Posture

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HighlightsJoint loading and function was assessed bilaterally in unilateral knee OA.Gait data can be summarised using a functional classification approach.Gait abnormailities in knee OA and following arthroplasty are relatively symmetrical.Joint loading and function frequently remains abnormal following arthroplasty.Pre-operative function (the Cardiff Classifier) can predict post-operative function.

show abstract

Frontal plane alignment: An imageless method to predict the mechanical femoral–tibial angle (mFTA) based on functional determination of joint centres and axes

Cited by 15 publications

References 29 publications

Repeatability and reproducibility of OSSCA, a functional approach for assessing the kinematics of the lower limb

Repeatability and reproducibility of OSSCA, a functional approach for assessing the kinematics of the lower limb

Musculoskeletal loading in the symptomatic and asymptomatic knees of middle‐aged osteoarthritis patients

Abnormal loading and functional deficits are present in both limbs before and after unilateral knee arthroplasty

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