1. Analysis of Osteonecrosis Following Pemberton Acetabuloplasty in Developmental Dysplasia of the Hip by Kuan-Wen Wu, Ting-Ming Wang, Shier-Chieg Huang, Ken N. Kuo, and Chi-Wen Chen J Bone Joint Surg Am Volume 92(11):2083-2094 September 1, 2010 ©2010 by The Journal of Bone and Joint Surgery, Inc.

2. Flowchart for patient selection and exclusion criteria. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

3. Diagram indicating the method used to determine the inferior displacement percentage. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

4. Logistic regression curve of the inferior displacement percentage (IDP) and probability of osteonecrosis developing. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

5. Anteroposterior pelvic radiograph of a girl with developmental dysplasia of the left hip, showing a Tönnis grade-III dislocation. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

6. Open reduction and Pemberton osteotomy was performed when the patient was twenty months of age. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

7. Anteroposterior pelvic radiograph made at the time of final follow-up, when the patient was sixteen years and four months of age, showing a congruent hip without osteonecrosis. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

8. Anteroposterior pelvic radiograph of a girl with developmental dysplasia of the left hip, showing a Tönnis grade-II dislocation. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

9. Open reduction and Pemberton osteotomy was performed when the patient was twenty-one months of age. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

10. Osteonecrosis of the left femoral head is seen on this anteroposterior pelvic radiograph made when the patient was three years of age. Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.

11. At ten years and five months following the surgery, the anteroposterior radiograph demonstrated closure of the lateral half of the physis with valgus angulation, classified as Kalamchi type II, which resulted in uncovering of the femoral head as well as a l... Kuan-Wen Wu et al. J Bone Joint Surg Am 2010;92:2083- 2094 ©2010 by The Journal of Bone and Joint Surgery, Inc.