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The Sigmoid Notch View for Distal Radius Fractures
Robin N Kamal1, Fraser Leversedge2, David S Ruch2
1Department of Orthopaedic Surgery, Stanford University, Redwood City, CA.
The Journal of Hand Surgery
|April 23, 2018
Summary
The sigmoid notch view reliably shows the distal radius articular surface alignment with the sigmoid stripe. This imaging technique aids surgeons in assessing articular surface integrity and guiding surgical hardware placement.
Area of Science:
- Orthopedic surgery
- Radiology
- Anatomy
Background:
- The sigmoid notch of the distal radius is crucial for wrist joint function.
- Accurate assessment of the sigmoid notch's articular surface is vital for surgical outcomes.
Purpose of the Study:
- To define the sigmoid notch view of the distal radius.
- To test the relationship between the subchondral bone's sigmoid stripe and the sigmoid notch's articular surface.
Main Methods:
- Anatomic and fluoroscopic analysis of 44 wrist specimens.
- Measurement of articular depth and classification of sigmoid notch shapes.
- Quantification of fluoroscopic depth using a radiopaque marker and a tangential sigmoid notch view.
Main Results:
- The articular surface marker was consistently superimposed or ulnar to the sigmoid stripe.
- Specific relationships were observed between the marker and the sigmoid stripe in different sigmoid notch types (flat, ski slope, C, S).
Conclusions:
- The sigmoid notch view demonstrates a consistent relationship between the articular surface and the sigmoid stripe.
- This view is a reliable tool for evaluating articular surface integrity and guiding surgical procedures, including hardware placement.
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