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

Updated: Feb 2026 48 Views
Orthopedic MCQs: Pinpoint Your Expertise Around the Pin

Key Medical Takeaway

Discover the latest medical recommendations for Orthopedic MCQS online Basic 018. Pin tract infection is a common orthopedic complication arising from external fixators or intramedullary nails. It involves infection of soft tissues and bone around the pin insertion site, presenting with redness, swelling, and discharge. Prompt treatment is essential to prevent complications like osteomyelitis and implant failure, ensuring proper patient recovery.

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Orthopedic MCQS online Basic 018

QUESTION 1
CLINICAL SITUATION
A 23-year-old man sustained a moderately comminuted femoral shaft fracture and simple oblique humeral shaft fracture in a motor vehicle collision. The humerus underwent open reduction and internal fixation with compression plating, whereas the femur was treated with an intramedullary device.
What factor is most associated with an increased likelihood of primary bone healing?




1
Increased fracture comminution
2
Relative fixation
3
Decreased fracture motion
4
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 ![img](/media/upload/02103a30-4b2a-464b-bdee-fa6037aa194a.jpg) ![img](/media/upload/c32c0c6c-07da-49db-b712-ec51f53d65e8.png) ![img](/media/upload/5fcf6fb4-70c5-480d-9235-43eb8dca80cc.png) ![img](/media/upload/d7e99070-9390-44f2-b428-355929bb39eb.png)
5
mesenchymal cells laying fibrous tissue and inflammatory cells.
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Dr. Mohammed Hutaif
Written & Medically Reviewed by
Dr. Mohammed Hutaif
Consultant Orthopedic & Spine Surgeon
Keywords
Prof. Mohammed Hutaif Orthopedic Surgeon Yemen question of clinical year old man around the pin return to its
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