Phases: inflammation → soft callus (cartilage) → hard callus (woven bone) → remodeling (lamellar). Primary (direct) vs secondary (indirect) healing; absolute vs relative stability concepts. Cell sources: periosteum (key), endosteum, marrow, surrounding soft tissues. Mechanical environment (strain theory) dictates tissue type; too much motion → nonunion. Timelines vary by bone/age/blood supply—tibia slower than femur; smokers/NSAIDs may delay.
Case Presentation A 28-year-old male presented to the emergency department following a road traffic accident with severe pain and deformity of th...
Introduction Scaphoid fractures are the most common fractures of the carpal bones, accounting for approximately 60–70% of all carpal fractu...
What is the primary mechanism of bone healing during the inflammatory phase of fracture healing?
During which phase of secondary fracture healing does the soft callus form?
Which type of fracture healing occurs with absolute stability at the fracture site?
What is the primary biological function of the hematoma formed immediately after a fracture?
Which of the following factors can impair healing during the inflammatory phase?
In secondary fracture healing, what is the primary role of mesenchymal stem cells (MSCs)?
What mechanical environment is most conducive to secondary fracture healing?
Which phase of secondary fracture healing is characterized by the transition from fibrocartilage to woven bone?
What is the primary source of cells for the formation of the periosteal callus during fracture healing?
Which of the following bones would generally heal the slowest after a fracture?
