What is the first stage of bone repair after a fracture?

What is the first stage of bone repair after a fracture?

• A. Formation of bony callus
• B. Formation of fibrocartilaginous callus
• C. Formation of a hematoma at the break
• D. Remodeling and addition

Answer: (C)

The first stage of bone repair after a fracture is characterized by the formation of a hematoma at the site of the break. When a bone fractures, the immediate response involves bleeding from the damaged blood vessels, which results in the accumulation of blood and tissue fluid around the fracture site, creating a hematoma. This hematoma serves several critical roles in the healing process: it provides a foundation for healing, it helps protect the fracture site, and it facilitates the recruitment of cells necessary for subsequent stages of repair. The presence of the hematoma creates an environment rich in signaling molecules and nutrients, which attracts inflammatory cells to the area. These cells are essential in cleaning up debris and initiating the healing cascade. After the hematoma forms, the healing process progresses to the formation of a fibrocartilaginous callus, followed by the formation of a bony callus and eventual remodeling. Understanding the sequence of events in bone healing, starting with the hematoma formation, is crucial for recognizing how fractures heal and the subsequent stages that follow.

The first stage of bone repair after a fracture is characterized by the formation of a hematoma at the site of the break. When a bone fractures, the immediate response involves bleeding from the damaged blood vessels, which results in the accumulation of blood and tissue fluid around the fracture site, creating a hematoma. This hematoma serves several critical roles in the healing process: it provides a foundation for healing, it helps protect the fracture site, and it facilitates the recruitment of cells necessary for subsequent stages of repair.

The presence of the hematoma creates an environment rich in signaling molecules and nutrients, which attracts inflammatory cells to the area. These cells are essential in cleaning up debris and initiating the healing cascade. After the hematoma forms, the healing process progresses to the formation of a fibrocartilaginous callus, followed by the formation of a bony callus and eventual remodeling. Understanding the sequence of events in bone healing, starting with the hematoma formation, is crucial for recognizing how fractures heal and the subsequent stages that follow.