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28 Cards in this Set

  • Front
  • Back
Open Reduction
Fracture repair that requires surgery
Closed reduction
Fracture repair that does not require surgery
Partial (incomplete)
fracture that does not extend through the full transverse width of a bone.
break involving the entire width of the bone
Closed (simple)
Bone not through skin
Open (compound)
Bone is through skin
Bone Splinters
Esp. in young; bone splinters at one end (side) only
A fracture in which the bone has been twisted apart and the line of break is helical.
Break at rt. angle to long acis of bone
One bone driven into another
Break at distal end of fibula
Distal end of radius breaks and is displaced backwards
Bones not aligned after break
Bones remain in alignment after break
Partial fracture, esp. from pounding while running hard surface, 1/4 occur at distal end of fibula
From neoplasm = new tissue from tumor or bone infection; bone is thus very weak
rupshired blood vessel
Fracture Repair
1. Formation of fracture hematoma
2. Fibrocartilaginous callus formation
3. Bony callus formation
4. Bone remodeling
Fracture hematoma
Clot that forms after 6 to 8 hours after break
Fibrocartilagenous Callus Formation
capillaries filtervnew blood into fracture hematoma helps organize into growing conn. tissue (procallus)
Fibroblast, osteogenic cells, and red marrow invade the procallus
Fibroblast form collagen fiber which help connect broken bones togther
Phagocytes continue to remove debris
Osteogenic cells form chondroblasts which forms fibrocartilage.
Bony Callus Formation
Osteogenitor cells give rise to Osteoblasts which start to make spongy bone trabeculae.
Trabeculae join with living and dead bone fragments
Fibrocartilage is turned into spongy bone
Bone Remodeling
Dead fragments of bone are resorbed by osteoclasts
Compact bone replaces spongy bone
A thickened area on the surface of the bone may remain after repair
Stimulates growth
Increases bone mass
What are the effects of exercise (2)?
loss of calcium and mineral from extracellular matrix
From decreases in estrogen - stimulates osteoblasts - more estrogen in females thus results in less bone mass
Decrease in protein metabolism
Brittle bones
Brittle bones
Less protein in diet, etc. means less collagen = less hardening = _____.