Hip Impingement

Question 1

What is hip impingement?

Answer 1

Abnormality of fem head and acetabulum contact
2 types:
Cam-Type FAI
Pincer-Type FAI

Question 2

What is Cam-Type FAI?

Answer 2

Caused by irregular Ossetia prominence of the femoral head/ head neck junction
Anterosuperior aspect of fem head/neck junction
Prominent in young active males
X-ray -90 degrees flexion, 20 degrees abduction

Question 3

What is Pincer-Type FAI?

Answer 3

Result of excess acetabular coverage of fem head
Coverage: global (coax profoundly) or focal anteriorly (acetabular retroversion)
Friction between both surfaces - impacting on the labrum
Lat centre edge angle greater than 40 degrees

Question 4

What are the symptoms of FAI?

Answer 4

Difficulty and pain sitting cross legged
Difficulties putting on socks or shoes
Long periods of sitting difficult 
Slight or more severe limp
Pain walking long distance - pain less is not instant after rest
Significant pain after sport
Buttock/ low back pain