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SA Orthopaedic Journal

On-line version ISSN 2309-8309
Print version ISSN 1681-150X


SOLOOKI, S; SAMANIAN, M; EMAMI, MJ  and  VOSOUGHI, AR. Relationship of radiographic criteria to clinical findings in patients with femoroacetabular impingement. SA orthop. j. [online]. 2013, vol.12, n.2, pp.38-41. ISSN 2309-8309.

BACKGROUND: Femoroacetabular impingement (FAI) leads to pain, limited joint motion and eventually osteoarthritis. The aim was to determine the usefulness of different radiographic criteria to diagnose FAI. METHODS: A total of 250 healthy-appearing participants were selected randomly for screening of hip pain and specific impingement tests. They were categorised in three groups: Group 0 included asymptomatic participants without positive impingement tests; Group 1 participants were either asymptomatic with positive impingement tests or symptomatic with negative tests; participants with painful hip and positive impingement tests formed Group 2. Radiographic criteria including cross-over sign, posterior wall sign, coxa profunda, acetabular protrusion, pistol grip deformity, centre-edge angle, extrusion index, offset ratio, alpha angle, herniation pits and osteoarthritic changes were utilised in anteroposterior and cross-table lateral radiograph assessment of all cases. Radiographic criteria were compared in different groups. RESULTS: Only centre-edge angle (mean 35.3 ± 5.9, p=0.05), herniation pits (p=0.04) and osteoarthritic changes (p=0.05) showed a statistically significant difference in patients with FAI in comparison to other groups. CONCLUSION: As herniation pits and osteoarthritis signs are secondary findings of femoroacetabular impingement and the centre-edge angle value is not very sensitive, radiographic criteria are not diagnostic of FAI.

Keywords : femoroacetabular impingement; hip; acetabulum.

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