The best view to demonstrate Bennett's fracture of the thumb:
- A- AP thumb
- B- Oblique for hand
- C- AP ,oblique thumb***
- D- PA thumb
- E- All are wrong.
The best view to demonstrate Bennett's fracture of the thumb is: C. AP and oblique thumb views
Here's why:
- Bennett's fracture:
This is a specific intra-articular fracture involving the base of the first metacarpal bone (thumb metacarpal), where it joins the carpal bone (trapezium).
- AP (anteroposterior) view:
This view provides a good overall picture of the thumb bones and joint, but it may not adequately visualize the intra-articular fragment in Bennett's fracture.
- Oblique view:
This view, specifically a true AP view with hyperpronation of the forearm, allows for better visualization of the joint space and potential displacement of the fracture fragment.
- PA (posteroanterior) view:
This view offers less information about the intra-articular aspect of the joint compared to the AP and oblique views.
- All are wrong:
This option is incorrect as both AP and oblique views are necessary for complete visualization of Bennett's fracture.
Therefore, combining AP and oblique views provides the most comprehensive information for diagnosing and assessing Bennett's fracture. They complement each other by showing different aspects of the joint and fracture.
Here are some additional details:
- Stress radiographs, where the thumbs are pressed together on an AP view, can also be helpful in revealing subtle subluxation of the fracture fragment.
- Other imaging modalities like CT scans may be used in complex cases for further detail.
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