1. Role of Cages in Revision Arthroplasty of the Acetabulum by Tatu J. Mäkinen, Paul Kuzyk, Oleg A. Safir, David Backstein, and Allan E. Gross J Bone Joint Surg Am Volume 98(3):233-242 February 3, 2016 ©2016 by The Journal of Bone and Joint Surgery, Inc.

2. Schematic drawing of the Gross classification system for acetabular defects (Types I through V) and different types of allografts used in reconstructing the defects. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

3. Figs. 2-A, 2-B, and 2-C Photographs of an acetabular roof ring and cages. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

4. Figs. 3-A through 3-D Photographs showing cage implantation. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

5. Figs. 4-A and 4-B A patient with a failed total hip replacement. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 5-A and 5-B A patient with a migrated acetabular component and an associated massive acetabular bone deficiency. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

7. Figs. 6-A, 6-B, and 6-C Schematic drawing of the implantation of a cup-cage construct. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.

8. Figs. 7-A and 7-B A patient who had a loose acetabular component with intrapelvic migration and was found to have pelvic discontinuity during revision surgery. Tatu J. Mäkinen et al. J Bone Joint Surg Am 2016;98:233- 242 ©2016 by The Journal of Bone and Joint Surgery, Inc.