Srpski arhiv za celokupno lekarstvo 2014 Volume 142, Issue 3-4, Pages: 178-183
https://doi.org/10.2298/SARH1404178A
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Contribution to the method for determining femoral neck axis
Anđelković Zoran (Department of Orthopedics and Traumatology, General Hospital, Leskovac)
Mladenović Desimir (Clinic of Orthopedics and Traumatology, Clinical Center of Niš, Niš + Faculty of Medicine, Niš)
Vukašinović Zoran (Institute of Orthopedic Surgery “Banjica”, Belgrade + Faculty of Medicine, Belgrade)
Arsić Stojanka (Faculty of Medicine, Niš)
Mitković Milorad (Clinic of Orthopedics and Traumatology, Clinical Center of Niš, Niš + Faculty of Medicine, Niš)
Micić Ivan (Clinic of Orthopedics and Traumatology, Clinical Center of Niš, Niš + Faculty of Medicine, Niš)
Mladenović Marko (Clinic of Orthopedics and Traumatology, Clinical Center of Niš, Niš)
Introduction. Femoral neck axis plotting is of great significance in
measuring parameters that define femoral head-neck junction sphericity in
the group of patients with the femoroacetabular impingement. Literature
methods of femoral neck axis determination have weaknesses associated with
the risk of obtaining inaccurate values of certain parameters. Objective.
Method of plotting of the femoral neck axis by two parallel lines that
belong to the medial quarter of the femoral neck is proposed. Method was
tested on the anatomic specimens and the respective radiograms. Methods. A
total of 31 anatomic specimens of the proximal femur and respective
radiographs were used, on which three axes of the femoral neck were plotted;
accordingly, alpha angle value was determined and tested with corresponding
parametric tests, with the measurement error of less than 5% and the
strength of the applied tests of 80%. Results. Alpha angle values obtained
by plotting femoral neck axis using the literature and methods we have
proposed were not significantly different in our series, and, in more than a
half of the specimens, the two axes overlapped each other. Conclusion. The
advantage of the proposed method does not depend on the position of the
femoral head rotation center in relation to the femoral neck, which favors
proposed method for measuring the angles of femoral head sphericity in
patients with the femoral head translation. Disadvantage of the study is a
small sample size for valid conclusions about the applicability of this
method in clinical practice.
Keywords: hip, femoral neck axis, new method, angle alpha