Page 183 - ASOP Orthopedic Casting Manual

8. What is the primary function of the hematoma formed during the inflammation stage?
A) To serve as a permanent structure for bone repair
B) To stabilize the fracture site and provide a matrix for cell migration
C) To create a hard callus immediately
D) To prevent infection at the fracture site

9. What is the main structural component of the soft callus?
A) Collagen
B) Woven bone
C) Lamellar bone
D) Hydroxyapatite crystals

10. How long can the hard callus stage last, depending on the severity of the injury?
A) 1-2 weeks
B) 6 months to a year
C) Several weeks to months
D) Several years

11. What is the primary function of osteoclasts during the remodeling stage?
A) To lay down new bone tissue
B) To resorb excess bone tissue from the hard callus
C) To produce collagen in the soft callus
D) To stimulate blood vessel growth

12. Which factor can influence the duration of the remodeling phase?
A) The size and complexity of the fracture
B) The patient’s blood pressure
C) The type of padding used in the cast
D) The presence of muscle atrophy

13. What is the primary outcome of the remodeling stage?
A) Formation of a soft callus that bridges the fracture site
B) Development of a hematoma for stability
C) Restoration of the bone to its pre-injury structure and function
D) Deposition of a fibrocartilaginous matrix