High Femoral Anteversion Is Related to Femoral Trochlea Dysplasia
Purpose To investigate the possible relation between femoral anteversion (AV) and trochlear morphology. Methods Among 560 available lower-limb computed tomography (CT) scans, those with previous fracture, arthroplasty, or osteotomy were excluded and 40 cases were randomly selected. The following 4 l...
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Veröffentlicht in: | Arthroscopy 2016-11, Vol.32 (11), p.2295-2299 |
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Zusammenfassung: | Purpose To investigate the possible relation between femoral anteversion (AV) and trochlear morphology. Methods Among 560 available lower-limb computed tomography (CT) scans, those with previous fracture, arthroplasty, or osteotomy were excluded and 40 cases were randomly selected. The following 4 lines were determined from the CT scans: 1 through the center of the femoral head and neck; 1 through the lesser trochanter and the center of the femoral shaft; 1 as a tangent to the dorsal part of the distal femur, just above the gastrocnemius insertion; and 1 as a tangent to the posterior condyles. Between the respective lines, the following parameters of femoral AV were determined: (1) total AV, (2) proximal AV, (3) diaphyseal AV, and (4) distal AV. Trochlea parameters were determined from 2 separate axial CT slices (proximal trochlea and 5 mm farther distally): trochlea height (medial, central, lateral), transverse trochlea shift, trochlea depth, sulcus angle, lateral trochlea slope, and Dejour trochlea type. To prove or disprove our study hypothesis, a correlation analysis was performed between the variables of AV and trochlear morphology. Results The total AV was significantly correlated with the trochlea parameters trochlea depth ( P = .032), sulcus angle ( P = .05), and lateral trochlea slope ( P = .001). The diaphyseal AV was significantly correlated with the sulcus angle ( P = .009). The distal AV showed significant correlations with medial, central, and lateral trochlea height (.005 < P < .032) and with Dejour trochlea type ( P = .043). Conclusions The morphology of the trochlea is significantly related to femoral AV. Increased AV is associated with a flatter, more dysplastic trochlea. This was particularly true for AV located at the distal femur. Level of Evidence Level III, diagnostic study of nonconsecutive patients. |
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ISSN: | 0749-8063 1526-3231 |
DOI: | 10.1016/j.arthro.2016.03.023 |