1. Instructional Course Lectures, The American Academy of Orthopaedic Surgeons - Common Complications of Total Knee Arthroplasty*† by DAVID C. AYERS, DOUGLAS A. DENNIS, NORMAN A. JOHANSON, and VINCENT D. PELLEGRINI J Bone Joint Surg Am Volume 79(2):278-311 February 1, 1997 ©1997 by The Journal of Bone and Joint Surgery, Inc.

2. Fig. 1 The top diagram demonstrates the asymmetrical thickness of the facets of the normal patella. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

3. Fig. 2 Diagram demonstrating internal rotation of the femoral component, which moves the trochlear groove medially in relation to the patella. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

4. Fig. 3 Diagram demonstrating the correct alignment of the tibia (left) and lateralization of the tibial tubercle due to internal rotation of the tibial component on the proximal part of the tibia (right). DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

5. Figs. 4-A and 4-B: Diagrams demonstrating the peripatellar vascular supply. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

6. Fig. 4-B The intraosseous vascular system. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

7. Figs. 5-A and 5-B: Lateral radiographs of a knee that was treated with a metal-backed patellar component. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

8. Fig. 5-B: Subsequent radiograph demonstrating a peg-plate fracture. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

9. Figs. 6-A, 6-B, and 6-C: Patellar clunk syndrome. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

10. Fig. 6-B Diagram demonstrating how the fibrous nodule clunks out of the intercondylar notch with extension of the knee. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

11. Fig. 6-C Intraoperative photograph demonstrating the suprapatellar fibrous nodule. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

12. Fig. 7 Anteroposterior and lateral radiographs of a supracondylar fracture in a patient who had osteopenic bone. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

13. Figs. 8-A through 8-D: Anteroposterior and lateral radiographs of an impacted supracondylar fracture proximal to a total knee replacement in a patient who had rheumatoid arthritis. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

14. Figs. 8-A and 8-B: Before treatment. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

15. Fig. 8-C After closed treatment, which led to an excellent result. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

16. Fig. 8-D After closed treatment, which led to an excellent result. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

17. Figs. 9-A through 9-D: Anteroposterior and lateral radiographs of a sixty-eight-year-old patient who sustained a displaced supracondylar fracture of the distal part of the femur two years after a total knee replacement. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

18. Figs. 9-A and 9-B: Before treatment. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

19. Fig. 9-C Six months after operative stabilization with a locked supracondylar nail. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

20. Fig. 9-D Six months after operative stabilization with a locked supracondylar nail. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

21. Fig. 10-A Anteroposterior and lateral radiographs made six months after open reduction and internal fixation of a supracondylar fracture of the distal part of the femur with use of a condylar buttress-plate. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.

22. Fig. 10-B Anteroposterior and lateral radiographs made six months after open reduction and internal fixation of a supracondylar fracture of the distal part of the femur with use of a condylar buttress-plate. DAVID C. AYERS et al. J Bone Joint Surg Am 1997;79:278- 311 ©1997 by The Journal of Bone and Joint Surgery, Inc.