Femoroacetabular impingement: A classic case of cam-type impingement in a 21-year-old soldier

The Etiology of Cam-type Femoroacetabular Impingement: A Cadaveric Study.

BACKGROUND There is a dearth of literature examining the causes of cam-type femoroacetabular impingement (FAI) and when such morphology appears. The purpose of the current study was to analyze how the ossific portion of the proximal femur develops over time with respect to standard cam-type FAI parameters. METHODS A collection of 193 femurs from cadavers aged 4 to 21 years were evaluated. The...

Osseous impingement occurs early in flexion in cam-type femoroacetabular impingement: a 4D CT model.

AIMS The aim of this study was to examine the real time in vivo kinematics of the hip in patients with cam-type femoroacetabular impingement (FAI). PATIENTS AND METHODS A total of 50 patients (83 hips) underwent 4D dynamic CT scanning of the hip, producing real time osseous models of the pelvis and femur being moved through flexion, adduction, and internal rotation. The location and size of t...

Femoroacetabular Impingement: A Newly Opened Window

Statistical shape modeling of cam femoroacetabular impingement.

Statistical shape modeling (SSM) was used to quantify 3D variation and morphologic differences between femurs with and without cam femoroacetabular impingement (FAI). 3D surfaces were generated from CT scans of femurs from 41 controls and 30 cam FAI patients. SSM correspondence particles were optimally positioned on each surface using a gradient descent energy function. Mean shapes for groups w...

Pincer-Type Femoroacetabular Impingement

Pincer-type femoroacetabular impingement is an acetabular/pelvic-sided disorder. Although acetabular overcoverage is a common theme for this disorder, there are distinct pincer subtypes with variable pathomorphologies that must be considered when contemplating the ideal approach and treatment for these disorders. In addition, emerging evidence suggests that extra-articular pelvic structures, su...