Orthopedic Basic Review | Dr Hutaif Basic Science Revie -...

Increased fracture comminution

Relative fixation

Decreased fracture motion

Bridging construct fixation Discussion: C Bone remodeling includes primary and secondary healing. Primary healing occurs with absolute fixation, minimal or no comminution, and decreased fracture motion; it is accomplished through Haversian remodeling. This process proceeds through osteoclast resorption, osteoblastic layering, lamellar layering, and finally, cement line creation. The Wolff law is defined as bone remodeling in response to mechanical stress. Increased fracture comminution or motion and relative fixation are associated with secondary healing and callus formation. Figures 1 through 3 show radiographs from a 32-year-old man who sustained a closed both-bone forearm fracture. Figures 2 and 3 were taken 6 weeks postoperatively. A histological sample of the fracture site at this point would most likely show    

mesenchymal cells laying fibrous tissue and inflammatory cells.