Healing of specialised tissue (fracture healing)

Healing of specialised tissue (fracture healing)


HEALING IN SPECIALIZED TISSUES

Fracture healing-

  • Healing of fracture by callus formation depends on-
  1. Traumatic/ pathological
  2. Complete/ incomplete
  3. Simple/ compound 

Healing of any fracture takes place by-

  1. Primary union of fracture
  2.  Secondary union (more common)- it is described under 3 heading-

a) Procallus formation- it is as follows

  1. Hematoma formation
  2. Local inflammatory response- fragments of necrosed bone are scavenged by macrophages & osteoclasts
  3. Ingrowth of granulation tissue- soft tissue callus formed
  4. Callus composed of woven bone & cartilage

b) Osseous callus formation-

  • Callus formation takes place- 4 to 12 weeks

c) Remodelling

  • Osteoblast & osteoclast removes necrotic content, which results in remodelling of the united bone end into compact bone.

Exam Important

  • Healing of any fracture takes place by-
  1. Primary union of fracture
  2.  Secondary union (more common)- it is described under 3 heading-

a) Procallus formation- it is as follows

  1. Hematoma formation
  2. Local inflammatory response- fragments of necrosed bone are scavenged by macrophages & osteoclasts
  3. Ingrowth of granulation tissue- soft tissue callus formed
  4. Callus composed of woven bone & cartilage

b) Osseous callus formation-

  • Callus formation takes place- 4 to 12 weeks

c) Remodelling

  • Osteoblast & osteoclast removes necrotic content, which results in remodelling of the united bone end into compact bone.

 

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