Bone Repair Essay

Bone Repair Process

The process initiated by the body when a bone breaks, mirroring initial bone formation but with an amplified response.

Dilation/Constriction

A vascular response where veins constrict and arteries dilate to promote fluid buildup and inflammation at the wound site.

Inflammation

A crucial phase characterized by redness, heat, pain, and immobilization that facilitates healing.

Redness

An increase in capillary production to supply nutrients to the wound.

Heat

Creates an inhospitable environment for pathogens.

Pain

Pinched nerve endings cause pain, which helps prevent further injury by discouraging movement.

Immobilization

Acts as nature's cast, further preventing injury.

Mediators of healing

These substances stay at the wound site longer to facilitate repair.

Fibrin

A protein net that traps pathogens at the wound site.

Heparin

An anticoagulant that prevents clotting from spreading beyond the wound site.

Macrophages

Cells that provide defense against pathogens during the bone repair process.

Osteoblasts

Cells responsible for bone growth by secreting hydroxyapatite.

Hematoma Formation

The process where a blood clot forms at the fracture site, providing a framework for healing.

Calcitonin

A hormone that deposits excess calcium onto the bone when levels in the bloodstream are too high.

PTH (Parathyroid Hormone)

A hormone that takes calcium from the bone and deposits it into the bloodstream.

Immobilization

Nature's cast during inflammation that helps prevent further injury to the area.

Neutrophil

The first cells to arrive at a wound site during the bone repair process.

Basophil

Provide defense against pathogens.

Osteocytes

Signal and direct the activities of other cells.

Chondrocytes

• come in and secrete cartilage within the hematoma

• Fibroblasts secrete collagen fibers onto this newly laid cartilage.

• Osteoblasts follow, secreting hydroxyapatite onto the collagen to form the trabeculae

• more hydroxyapatite = compact bone

• osteoclasts remodel and reshape the bone

• healed bone is stronger after a break.