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Scaphoid nonunions. Pitfalls and pearls.
1Department of Orthopaedic Surgery and Sports Medicine, University of Washington, Seattle, Washington, USA.
Hand Clinics
|January 5, 2002
Summary
Treating scaphoid nonunions has improved with advanced imaging and surgical techniques. Vascularized bone grafts and precise screw fixation are key for successful outcomes and restoring function.
Area of Science:
- Orthopedic surgery
- Hand surgery
- Radiology
Background:
- Scaphoid nonunions present challenges in fracture healing.
- Accurate assessment of bone loss and deformity is crucial for treatment planning.
Purpose of the Study:
- To outline current, improved treatment strategies for scaphoid nonunions.
- To emphasize the role of advanced imaging and surgical techniques.
Main Methods:
- Computed tomography (CT) scans for assessing waist fractures.
- Magnetic resonance imaging (MRI) for detecting avascular necrosis (AVN).
- Surgical techniques including reduction, bone grafting (vascularized preferred for AVN), and cannulated screw fixation.
Main Results:
- CT provides accurate assessment of collapse and bone loss in waist fractures.
- MRI effectively identifies avascular necrosis in the proximal pole.
- Vascularized bone grafts are recommended for AVN.
- Specific surgical approaches (volar for humpback, dorsal for proximal pole) optimize correction.
- Cannulated screw fixation, targeting the scaphoid center, ensures stability and promotes healing.
Conclusions:
- Modern techniques significantly improve scaphoid nonunion treatment outcomes.
- Accurate imaging, appropriate graft selection, and stable fixation are essential.
- Successful treatment leads to restored range of motion, grip strength, and pain relief.