The Journey of Bone Healing After a Fracture

The video explains the process of bone healing after a fracture, which involves several stages: hematoma formation, inflammation, soft callus formation, hard callus formation, and remodeling. Each stage plays a crucial role in the healing process. The video also distinguishes between primary and secondary bone healing, highlighting the importance of stability in the healing process. Primary healing involves rigid fixation and direct bone formation, while secondary healing involves cartilage formation and is less stable. The final stage, remodeling, strengthens the bone over time.

What is the initial stage of bone healing after a fracture?

• Soft Callus

• Hematoma

• Inflammation

• Remodeling

Which cells are involved in the inflammation stage of bone healing?

• Fibroblasts

• Chondrocytes

• Macrophages and mesenchymal stem cells

• Osteoblasts

Which stage of bone healing involves the formation of a fibrin blood clot?

• Hard Callus

• Hematoma

• Soft Callus

• Remodeling

What is the relationship between immobilization and callus formation?

• More immobilization leads to more callus

• Less immobilization leads to less callus

• Flexible immobilization leads to less callus

• Stiffer immobilization leads to less callus

What is secondary bone healing characterized by?

• Intramembranous healing

• Rigid fixation

• Cartilage formation

• Absolute stability

What type of healing occurs when the bone is fixed with plates?

• Cartilage ossification

• Secondary bone healing

• Endochondral ossification

• Primary bone healing

What type of collagen is associated with primary bone healing?

• Type 4 collagen

• Type 3 collagen

• Type 1 collagen

• Type 2 collagen

During the hard callus stage, what change occurs in collagen?

• Type 3 to Type 4

• Type 4 to Type 3

• Type 1 to Type 2

• Type 2 to Type 1

What is the final stage of bone healing?

• Remodeling

• Soft Callus

• Inflammation

• Hard Callus

What law influences the remodeling of bone?

• Newton's Law

• Wolff's Law

• Boyle's Law

• Ohm's Law