Final answer:
The final stage in the healing of a bone fracture is remodeling, where the bony callus is remodeled by osteoclasts and osteoblasts.
Step-by-step explanation:
The final stage in the healing of a bone fracture is remodeling. After the formation of a bony callus, the bony callus is then remodeled by osteoclasts and osteoblasts. Excess material on the exterior of the bone and within the medullary cavity is removed, and compact bone is added to create bone tissue similar to the original, unbroken bone.