Types of Callus in Fracture Healing
External (periosteal) vs internal (endosteal) callus; bridging and uniting fragments. Primary (contact) healing has minimal/no callus under rigid stability; secondary healing forms abundant callus under relative stability. Radiographic callus reflects mechanical environment and biology; hypertrophic callus suggests instability. Histology: woven bone → lamellar bone remodeling along stress lines.
Practised by MCQ
10What type of callus forms on the outer surface of bone during fracture healing?
mcqWhich type of callus is primarily responsible for restoring the internal architecture of bone?
mcqWhat type of callus is most abundant during secondary healing under relative stability?
mcqWhat histological feature characterizes the early stage of callus formation?
mcqWhat does a hypertrophic callus suggest about the stability of a fracture?
mcqWhich type of callus forms directly between the fracture fragments?
mcqWhat is the primary difference between primary and secondary fracture healing?
mcqWhich type of callus provides early stabilization at the fracture interface?
mcqDuring which phase of fracture healing does callus formation primarily occur?
mcqWhat radiographic appearance is expected with adequate callus formation during fracture healing?