Relationship of radiographic criteria to clinical findings in patients with femoroacetabular impingement

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.

Bibliographic Details

Main Authors:	Solooki,S, Samanian,M, Emami,MJ, Vosoughi,AR
Format:	Digital revista
Language:	English
Published:	Medpharm Publications 2013
Online Access:	http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1681-150X2013000200006
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