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[The prevalence of reduced acetabular anteversion in asymptomatic patients: a retrospective analysis]
F Hildebrand1, H-O Shin, L Flötotto
1Unfallchirurgische Klinik, Medizinische Hochschule Hannover. Hildebrand.Frank@mh-hannover.de
Background:
In patients with unilateral femoroacetabular impingement (FAI), bony characteristics predisposing to FAI (e.g., acetabular retroversion) are also commonly observed in the contralateral asymptomatic hip. This study investigated the prevalence of these characteristics in an asymptomatic population and the influence of pelvic inclination and tilt on acetabular anteversion.
Patients And Methods:
In this study, patients with unspecific abdominal pain in whom CT including the hip was performed to aid diagnosis were included. Exclusion criteria were previous fractures of the acetabulum or the femur and surgical pretreatment of the hip. AV, CE angle, CCD angle and the distance between the anterior and posterior acetabular rims were determined.
Results:
11.5 % of the 400 included hip joints had a central AV of < 15°. A central retroversion was not found. Female patients had a significantly higher AV compared to males (p < 0.05). Pelvic tilt and inclination had a significant influence on the AV.
Conclusion:
Correct assessment of AV is dependent on a correct pelvic radiograph. 16.5 % of the hips of asymptomatic patients had at least one bony characteristic predisposing to FAI.
