1. The Influence of Active Shear or Compressive Motion on Fracture-Healing* by SANG-HYUN PARK, KIM O'CONNOR, HARRY MCKELLOP, and AUGUSTO SARMIENTO J Bone Joint Surg Am Volume 80(6):868-78 June 1, 1998 ©1998 by The Journal of Bone and Joint Surgery, Inc.

2. Fig. 1 Drawings showing the orientation of the fracture and the fixator from anterior to posterior. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

3. Figs. 2-A and 2-B: Graphs depicting the changes in the in vivo motion of the fracture fragments over time. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

4. Fig. 2-B Oblique fractures fixed with a locked external fixator (Group 3, four animals) or a sliding oblique external fixator (Group 4, four animals). SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

5. Fig. 3 Graph illustrating the torsional properties (maximum torque, stiffness, angular displacement at failure, and energy required for failure) of the healing tibial fractures in the different treatment groups at two and four weeks. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 4-A and 4-B: Photomicrographs showing peripheral callus adjacent to the medial cortex of rabbit tibiae after two weeks of healing of transverse fractures (undecalcified sections stained with toluidine blue O; original magnification, x 54; bar = 0.5 mi... SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

7. Fig. 4-B The callus surrounding a fracture that was treated with an axial telescoping fixator is bridged with fibrous tissue. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

8. Fig. 5 Photomicrograph showing peripheral callus adjacent to the lateral cortex of the tibia of a rabbit that was treated with an oblique sliding fixator for two weeks. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

9. Figs. 6-A and 6-B: Photomicrographs showing peripheral callus adjacent to the medial cortex of rabbit tibiae after four weeks of healing (undecalcified sections stained with toluidine blue O; original magnification, x 21; bar = one millimeter). SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.

10. Fig. 6-B The callus surrounding an oblique fracture that was treated with a sliding fixator is bridged with a large mass of relatively thin osseous trabeculae containing residual spicules of cartilage. SANG-HYUN PARK et al. J Bone Joint Surg Am 1998;80:868-78 ©1998 by The Journal of Bone and Joint Surgery, Inc.