1. Hip Arthroscopy for Challenging Deformities: Global Pincer Femoroacetabular Impingement 
Dean K. Matsuda, M.D., Nikhil Gupta, B.S., Dylan Hanami, B.S. 
Arthroscopy Techniques 
Volume 3, Issue 2, Pages e197-e204 (April 2014)
DOI: /j.eats
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

2. Fig 1
AP pelvis radiograph of 20-year-old woman showing bilateral severe coxa profunda with extreme global pincer and cam FAI. The more symptomatic right hip has a CEA of 62°.
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

3. Fig 2
Preoperative fluoroscopic template of right hip. The 1 represents the first templating step, and the yellow dot is the set point for the desired CEA (in this case set at 35°). The 2 represents the second step, drawing the anterior rim template (blue line) to the lateral radiographic border of the pubis (blue dot). The 3 represents the third step, drawing the posterior rim template (red line) to the lateral border of the ischium (red dot). The posterior rim template passes through the radiographic center of the femoral head (green dot) and the anterior rim template passes superior and medial to the same landmark.
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

4. Fig 3
Intraoperative AP fluoroscopic image showing metallic burr adjacent to posterior rim at midway point of arthroscopic posterior acetabuloplasty. The black lines encompass the entire region of posterior wall resection, and the red line highlights the remaining posterior wall to be resected to the solid black line, indicating desired postoperative rim reduction. The asymmetric hip distraction should be noted. (Dotted black line, original border of the posterior acetabular wall.)
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

5. Fig 4
Arthroscopic image of right hip during supine arthroscopy. The 70° arthroscope is in the anterolateral portal aimed posteroinferior showing the posterior acetabular rim (AR) during arthroscopic posterior acetabuloplasty using a burr (Flat-top; Smith & Nephew, Andover, MA) in the MMAP to resect excess bone (asterisk) near the direct posterior acetabular rim (9). One should note the protective posterior position of the burr sheath and adjacent muscle belly of the obturator internus, behind which lies the sciatic nerve.
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

6. Fig 5
Arthroscopic image of right hip after arthroscopic subtotal acetabuloplasty. One should note the exposed femoral head (FH), which was originally fully covered by extreme global acetabular overcoverage and enabled access to the central compartment. The asterisk shows preserved capsular tissue that adhered to the labrum. (AR, acetabular rim.)
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

7. Fig 6
Arthroscopic image of right hip after arthroscopic subtotal acetabuloplasty and capsulolabral reconstruction (asterisks). The visible femoral head (FH) and extensively trimmed acetabular rim should be noted. (10, posterior acetabular rim just above equator; 12, direct superior acetabular rim.)
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions

8. Fig 7
Detail of postoperative AP pelvis radiograph showing reshaped acetabulum after arthroscopic subtotal acetabuloplasty with reduction of anterior rim (blue line), posterior rim (red line), and superolateral rim (arrowhead) with CEA measuring 36°. One should note the neutral posterior wall sign passing through the radiographic center of the femoral head, as well as the area of superior femoroplasty (arrow).
Arthroscopy Techniques 2014 3, e197-e204DOI: ( /j.eats )
Copyright © 2014 Arthroscopy Association of North America Terms and Conditions