Center-edge angle = angle of Wiberg = lateral center-edge angle
Anterior center-edge angle = vertical center anterior margin angle (VCA)
Definitions
Acetabular depth: Coverage of femoral head by acetabulum
Measured by center-edge angle of Wiberg
Use both lateral and anterior center-edge angle
Coxa profunda: Descriptor for deep acetabulum
Medial wall of acetabulum medial to ilioischial line
Center-edge angle > 40°
Protrusio acetabulae: Descriptor for deep acetabulum
Medial cortex of femoral head medial to ilioischial line
Acetabular version: Relationship of anterior and posterior rims of acetabulum
Anteversion: Anterior rim is medial to posterior rim
Retroversion: Anterior rim is lateral to posterior rim
Femoral version: Rotation of femoral neck relative to femoral condyles
Anteversion: Femoral neck axis is anterior to axis of femoral condyle
Retroversion: Femoral neck axis is posterior to axis of femoral condyle
Sourcil: Weight-bearing portion of acetabular roof
Demarcated by sclerotic subchondral bone plate
Hilgenreiner line: Horizontal line joining superior margins of triradiate cartilage
IMAGING ANATOMY
Overview
Acetabular Roof Morphology
Acetabular Depth
Acetabular Version
Femoral Head Coverage
Femoral Head Morphology
Femur
Mechanical Axis of Lower Extremity
ANATOMY IMAGING ISSUES
Acetabular Overcoverage
Acetabular Undercoverage
Decreased Femoral Head-Neck Offset
Selected References
Tannast M et al: What are the radiographic reference values for acetabular under- and overcoverage? Clin Orthop Relat Res. ePub, 2014
Nepple JJ et al: Coxa profunda is not a useful radiographic parameter for diagnosing pincer-type femoroacetabular impingement. J Bone Joint Surg Am. 95(5):417-23, 2013
Anderson LA et al: Coxa profunda: is the deep acetabulum overcovered? Clin Orthop Relat Res. 470(12):3375-82, 2012
Werner CM et al: Normal values of Wiberg's lateral center-edge angle and Lequesne's acetabular index--a coxometric update. Skeletal Radiol. 41(10):1273-8, 2012
Delaunay S et al: Radiographic measurements of dysplastic adult hips. Skeletal Radiol. 26(2):75-81, 1997
Notzli HP et al: The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement. J Bone Joint Surg. 84:556-560, 2002
Reynolds D et al: Retroversion of the acetabulum. J Bone Joint Surg. 81-B:281-288, 1999
Tonnis D et al: Diminished femoral antetorsion syndrome: a cause of pain and osteoarthritis. J Ped Orthop. 11:419-431, 1991
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
TERMINOLOGY
Synonyms
Center-edge angle = angle of Wiberg = lateral center-edge angle
Anterior center-edge angle = vertical center anterior margin angle (VCA)
Definitions
Acetabular depth: Coverage of femoral head by acetabulum
Measured by center-edge angle of Wiberg
Use both lateral and anterior center-edge angle
Coxa profunda: Descriptor for deep acetabulum
Medial wall of acetabulum medial to ilioischial line
Center-edge angle > 40°
Protrusio acetabulae: Descriptor for deep acetabulum
Medial cortex of femoral head medial to ilioischial line
Acetabular version: Relationship of anterior and posterior rims of acetabulum
Anteversion: Anterior rim is medial to posterior rim
Retroversion: Anterior rim is lateral to posterior rim
Femoral version: Rotation of femoral neck relative to femoral condyles
Anteversion: Femoral neck axis is anterior to axis of femoral condyle
Retroversion: Femoral neck axis is posterior to axis of femoral condyle
Sourcil: Weight-bearing portion of acetabular roof
Demarcated by sclerotic subchondral bone plate
Hilgenreiner line: Horizontal line joining superior margins of triradiate cartilage
IMAGING ANATOMY
Overview
Acetabular Roof Morphology
Acetabular Depth
Acetabular Version
Femoral Head Coverage
Femoral Head Morphology
Femur
Mechanical Axis of Lower Extremity
ANATOMY IMAGING ISSUES
Acetabular Overcoverage
Acetabular Undercoverage
Decreased Femoral Head-Neck Offset
Selected References
Tannast M et al: What are the radiographic reference values for acetabular under- and overcoverage? Clin Orthop Relat Res. ePub, 2014
Nepple JJ et al: Coxa profunda is not a useful radiographic parameter for diagnosing pincer-type femoroacetabular impingement. J Bone Joint Surg Am. 95(5):417-23, 2013
Anderson LA et al: Coxa profunda: is the deep acetabulum overcovered? Clin Orthop Relat Res. 470(12):3375-82, 2012
Werner CM et al: Normal values of Wiberg's lateral center-edge angle and Lequesne's acetabular index--a coxometric update. Skeletal Radiol. 41(10):1273-8, 2012
Delaunay S et al: Radiographic measurements of dysplastic adult hips. Skeletal Radiol. 26(2):75-81, 1997
Notzli HP et al: The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement. J Bone Joint Surg. 84:556-560, 2002
Reynolds D et al: Retroversion of the acetabulum. J Bone Joint Surg. 81-B:281-288, 1999
Tonnis D et al: Diminished femoral antetorsion syndrome: a cause of pain and osteoarthritis. J Ped Orthop. 11:419-431, 1991
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