1. Complications Associated with Pedicle Screws* by JOHN E. LONSTEIN, FRANCIS DENIS, JOSEPH H. PERRA, MANUEL R. PINTO, MICHAEL D. SMITH, and ROBERT B. WINTER J Bone Joint Surg Am Volume 81(11):1519-28 November 1, 1999 ©1999 by The Journal of Bone and Joint Surgery, Inc.

2. Fig. 1-A Illustrations showing the technique, developed by one of us (F. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

3. Fig. 1-B Illustrations showing the technique, developed by one of us (F. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

4. Fig. 2 Bar graph showing the number of procedures performed each year from 1984 to 1993. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

5. Fig. 3 Bar graph showing the total number of patients who had each diagnosis as well as the number who had had a previous spinal procedure. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

6. Fig. 4 Bar graph showing the age of the patients, by decade, at the time of the procedure. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

7. Fig. 5 Pie chart showing the number of screws used with each of the different pedicle-screw systems. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

8. Fig. 6 Bar graph showing the number of procedures that were performed with each different number of screws. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.

9. Fig. 7 Bar graph showing the number of screws inserted at each vertebral level, from the ninth thoracic to the second sacral level. JOHN E. LONSTEIN et al. J Bone Joint Surg Am 1999;81:1519-28 ©1999 by The Journal of Bone and Joint Surgery, Inc.