Reconstruction of Paprosky type IIIB acetabular bone defects using a cup-on-cup technique: A surgical technique and case series

Figure 1 The surgical technique. A: A tantalum metal (TM) revision shell was removed from the peripheral titanium ring; B: The TM-cup augment was used to reconstruct defects during operation and the bone above the TM-cup augment was reamed to catch the final cup; C: A Pinnacle acetabular cup was implanted.

Figure 2 A 29-year-old man with posttraumatic acetabular defect and recurrent infection. A: Pre-operative radiograph; B: Postoperative radiograph showing reconstruction using our cup-on-cup technique; C: At the 36-mo follow-up, the implants were stable.