1. Abundant heterotopic bone formation following use of rhBMP-2 in the treatment of acetabular bone defects during revision hip arthroplasty 
Alexander Arzeno, MD, Tim Wang, MD, James I. Huddleston, MD 
Arthroplasty Today 
Volume 4, Issue 2, Pages (June 2018)
DOI: /j.artd
Copyright © 2018 The Authors Terms and Conditions

2. Figure 1
Preoperative pelvic radiographs. Anteroposterior (AP) (a), inlet (b), outlet (c), obturator oblique (d), and iliac oblique (e) images.
Arthroplasty Today 2018 4, DOI: ( /j.artd )
Copyright © 2018 The Authors Terms and Conditions

3. Figure 2
Postoperative radiograph taken immediately after the first staged surgery.
Arthroplasty Today 2018 4, DOI: ( /j.artd )
Copyright © 2018 The Authors Terms and Conditions

4. Figure 3
Two months after explant and bone grafting postoperative radiographs of the pelvis (a), hip AP (b), and lateral (c).
Arthroplasty Today 2018 4, DOI: ( /j.artd )
Copyright © 2018 The Authors Terms and Conditions

5. Figure 4
Radiographs taken after the second stage of the procedure. Immediately postoperative (a), 8 months postoperative AP pelvis (b), AP hip (c), and lateral hip (d).
Arthroplasty Today 2018 4, DOI: ( /j.artd )
Copyright © 2018 The Authors Terms and Conditions

6. Figure 5 BMP gene transcription pathway.
Arthroplasty Today 2018 4, DOI: ( /j.artd )
Copyright © 2018 The Authors Terms and Conditions