What is the term for the replacement of the callus with spongy bone during healing?

The process referred to in the question is known as remodeling. During the healing of a fracture, the body initially forms a callus, which is a temporary bridge made of cartilage and fibrous tissue at the fracture site. As the healing progresses, this callus is gradually replaced by spongy (or trabecular) bone through a process called remodeling. Remodeling is essential because it strengthens the healing bone and restores its normal structure by converting the woven bone initially formed during healing into a more organized lamellar bone structure.

This process is critical in bone repair, ensuring that the bone regains its strength and function. It involves the activity of specialized cells called osteoblasts, which form new bone, and osteoclasts, which resorb old bone. Through this balance of new formation and resorption, the skeletal system adapts to loads and stresses placed upon it.

The other terms listed do not relate specifically to this process. Callus formation refers to the initial stage of fracture healing, while dislocation refers to a joint injury where bones are forced out of their normal positions. Avulsion describes an injury where a tendon or ligament pulls away a piece of bone but is not related to the healing process of a fracture.