Hip Alpha AngleDEFINITION: Using the axial oblique sequence, a circle is centered over femoral head. The angle is formed by: 1) A line parallel to the femoral neck axis 2) A line from the center of the femoral head to the transition of the femoral head into the femoral neck (neck ...
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 ...
A higher alpha angle has been proposed to correlate with lower hip range of motion, but the association in people with longstanding hip and groin pain is currently unclear. The aims were to: (1) assess the association between range of motion and alpha angle in patients with longstanding hip ...
In the Dunn view, an alpha angle greater than 60 degree is the most common cutoff for CAM FAI deformity, but a wide variety of values have been utilized, including 42–63 degree.4,18 In the same view, the femoral head-neck offset (HNO) and HNO ratio can be calculated to investigate ...
Relationship between offset angle alpha and hip chondral injury in femoroacetabular impingement. Arthroscopy. 2008;24(6):669–75. Article PubMed Google Scholar Kelly BT, Bedi A, Robertson CM, Dela Torre K, Giveans MR, Larson CM. Alterations in internal rotation and alpha angles are associated...
Alpha angle measurements in healthy adult volunteers vary depending on the MRI plane acquisition used. Am J Sports Med. 2017;45(3):620–6. Article PubMed Google Scholar Rakhra KS, Sheikh AM, Allen D, Beaule PE. Comparison of MRI alpha angle measurement planes in femoroacetabular impingement...
11 Two studies evaluated predictors of worsening sonographic findings; an alpha angle < 55 on the initial ultrasonography, instability, central nervous system anomalies, and unilateral Type 2a hips were found to be independent predictors of sonographic worsening [33, 34]. Third, the swaddling ...
The reliability of the alpha angle has been shown for quantifying cam deformities in femoroacetabular impingement syndrome. An intraoperative navigation tool that provides the ability to compare alpha angle measurements side by side on pre- and post-resection fluoroscopic images has recently been ...
Irreducible hip dislocation, moderate dysplasia, moderate subluxation withou complete obliteration of the joint space, preop center-edge angle >10°: Chiari pelvic osteotomy (Ito H, JBJS 2004;86A:1439)..DDH Associated AnomaliesMetatarsus adductus Hyperextended knees / congential knee dislocation Torti...
Results showed that the boys had a consistently higher alpha angle, a lower beta angle, better head coverage, and larger head size through the 6 months. Differences between the right and left hips were only noted in the beta angle. The containment of the hip was found to increase rapidly ...