Femoroacetabular impingement

Jaron P. Sullivan, Jacqueline Munch, Eilish O’ Sullivan, Bryan T. Kelly

Research output: Chapter in Book/Report/Conference proceedingChapter


Femoroacetabular impingement (FAI) results from abnormal contact between the acetabulum and the femur. Femoral-sided impingement, also known as cam impingement, damages the labrum and intra-articular cartilage as the aspherical femoral head reaches terminal range of motion. Pincer impingement occurs due to acetabular over coverage, which may be focal or global, and damages the labrum as the excess rim impacts against the femoral neck. Both cam and pincer impingementlimit hip range of motion and cause repetitive edge loading. This results in progressive labral injury, chondral injury, and hip degeneration that is irreversible [1].

Original languageEnglish (US)
Title of host publicationDiagnosis and Management of Hip Disease
Subtitle of host publicationBiological Bases of Clinical Care
PublisherSpringer International Publishing
Number of pages19
ISBN (Electronic)9783319199054
ISBN (Print)9783319199047
StatePublished - Jan 1 2015

ASJC Scopus subject areas

  • Medicine(all)


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