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Hip center edge angle and alpha angle correlate with gait variables in femoroacetabular impingement morphology (919.11)
Author(s) -
Farkas Gary,
Haro Marc,
Lee Simon,
Espinoza Orias Alejandro,
Nho Shane
Publication year - 2014
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.28.1_supplement.919.11
Subject(s) - femoroacetabular impingement , gait , medicine , kinematics , radiography , orthodontics , range of motion , physical therapy , surgery , physics , classical mechanics
Gait deviations have been observed in symptomatic femoroacetabular impingement (FAI) and other disorders of hip morphology 1‐2 . However the nature of the relationship between hip morphology and gait is still unclear. We hypothesize that when FAI is diagnosed via the alpha or center edge angles, significant associations with kinematic and kinetic gait variables will be present. This IRB approved study recruited 20 preoperative patients scheduled for FAI hip arthroscopy. Subjects with back or lower extremity pathologies were excluded. Gait testing was performed using published methods 3 . Radiographs measured by a single observer were compared to range of motion and peak external moments (%body weight x height) about the surgical side hip and knee. Significant correlations were found between the center edge angle and minimum knee flexion angle (R=0.460, p=0.041) as well as peak external knee extension moment (R=0.547, p=0.013). Alpha angle significantly correlated with peak external hip extension moment (R=0.447, p=0.048). A moderate correlation was found between the alpha angle and minimum hip flexion angle (R=0.414, p=0.069) and the center edge angle and peak external hip flexion moment (R=‐0.399, p=0.081).The relationships seen with this preliminary data are encouraging and support the association between hip morphological abnormalities and gait variables. 1. Hunt MA, Gunether JR, Gilbart MK. Kinematic and kinetic differences during walking in patients with and without symptomatic femoroacetabular impingement. Clin Biom. 2013: 28(5): 519‐523. 2. Rylander JH, Shu B, Favre J, et al. Functional testing provides unique insights into the pathomechanics of femoroacetabular impingement and an objective basis for evaluating treatment outcome. J Ortho Research . 2013: 31(9): 1461‐1468. 3. Andriacchi TP, Natarajan RN, Hurwitz DE. Musculoskeletal dynamic locomotion and clinical applications. Mow VC, Huiskes R. Basic Ortho. Biom and MechanoBiology . 3 Ed. PA: Lippincott; 2005. 91‐121. Grant Funding Source : Sponsored by the American Association of Anatomists/Anatomy and Rush University Medical Center