Femoro-Acetabular Impingement (Subscribe)  

Femoroacetabular impingement may occur in patients with so-called acetabular retroversion, which is seen as the crossover sign on standard radiographs. We noticed when a crossover sign was present the ischial spine commonly projected into the pelvic cavity on an anteroposterior pelvic radiograph. To confirm this finding, we reviewed the anteroposterior...

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Conclusions These data suggest retroversion involves the acetabulum at all levels and includes the entire pelvic segment containing the acetabulum and the ischial spine.
Clinical Relevance These data are relevant for surgeons in providing targets for normal positioning of the acetabulum during periacetabular osteotomies and acetabular recontouring procedures.
Multilevel measurement of acetabular version using...

Operative Treatment for Pincer Type Femoroacetabular Impingement:A Case Report Acta Med. Okayama, 2010 Vol 64, No 2, 149-154 Endo et al full text

x-ray illustration of a case of FAI Pincer type. contributed by Dr Frank Gaillard on May 19, 2008

Surgical dislocation of the hip is rarely undertaken. The potential danger to the vascularity of the femoral head has been emphasised, but there is little information as to how this danger can be avoided. We describe a technique for operative dislocation of the hip, based on detailed anatomical studies of...

The etiology of osteoarthritis of the hip has long been considered secondary (eg, to congenital or developmental deformities) or primary (presuming some underlying abnormality of articular cartilage). Recent information supports a hypothesis that so-called primary osteoarthritis is also secondary to subtle developmental abnormalities and the mechanism in these cases is...

Anterior femoroacetabular impingement results from abnormal abutment of the anterolateral femoral head-neck junction with the anterior acetabular-labral complex resulting in pain and progressive hip dysfunction. This under-recognized problem could be the manifestation of acetabular or proximal femoral deformity, and when left untreated leads to the development of osteoarthritis of the...