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Differences in radiographic findings between scaphoid fracture patterns.
H Inagaki1, R Nakamura, E Horii
1Department of Hand Surgery, Nagoya University School of Medicine, Nagoya 466-8550, Japan. ineyan240@hotmail.com
Summary
Radiography can identify scaphoid fracture patterns, differentiating volar and dorsal types. Combining oblique views with proximal fragment ratio (PFR) improves diagnostic accuracy for these wrist fractures.
Area of Science:
- Orthopedic surgery
- Radiology
- Biomechanics
Background:
- Scaphoid fractures are common wrist injuries.
- Classifying scaphoid fracture patterns (volar vs. dorsal) is crucial for treatment.
- Three-dimensional computed tomography (3D CT) is effective for pattern classification.
Purpose of the Study:
- To evaluate the diagnostic accuracy of conventional radiography in identifying scaphoid fracture patterns.
- To compare the effectiveness of different radiographic views and proximal fragment ratio (PFR) measurements.
Main Methods:
- Ninety-nine patients with scaphoid fractures underwent 3D CT and radiography.
- Analysis of oblique radiographs (45° pronation and supination) and PFR measurements.
- Correlation of radiographic findings with 3D CT classifications.
Main Results:
- Oblique views identified volar type in 76% and dorsal type in 56% of cases.
- Proximal fragment ratio (PFR) showed significant differences between volar (0.59) and dorsal (0.43) types.
- Combined use of oblique views and PFR differentiated patterns in 81% of fractures.
Conclusions:
- Conventional radiography, particularly with combined oblique views and PFR, can effectively differentiate volar and dorsal scaphoid fracture types.
- This approach offers a valuable alternative to 3D CT for scaphoid fracture pattern identification.
- No significant difference in dorsal intercalated segment instability deformity prevalence was noted between fracture types.